Answers
Answer:
D
Explanation:
Option D is the correct Lewis structure of ozone.
Ozone is known to be an allotrope of oxygen which has three atoms of oxygen.
In the Lewis structure of ozone, one pair of oxygen is actually double-bonded while the other is single-bonded. In this structure, two oxygen atoms carry charges. In the drawing the Lewis structure of ozone, we discover that one oxygen atom of the ozone has a -1 charge and while another oxygen atom of the ozone has a +1 charge.
Related Questions
Which items can be classified as matter? Check all that apply.
Answers
Answer:
a globe
snow rain clouds
Calculate the number of moles in 2.4x10^46 molecules of Na ions
explain how you got your answer pls.
Answers
There would be 4 * 10^22 moles of the sodium ions.
What is the number of moles?We have to know that the number of moles of the ions can be obtained by the use of the formula for the Avogadro's number. From the Avogadro's number, we know that one mole of the substance is going to contain about 6.02 * 10^23 molecules of the sodium ions.
As such we have that;
If 1 mole can contain about 6.02 * 10^23 molecules of the sodium ions
x moles would contain 2.4x10^46 molecules of Na ions
x = 1 * 2.4x10^46/ 6.02 * 10^23
x = 4 * 10^22 moles
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Calculate the approximate molecular weight of a protein composed of 701 amino acid residues in a single polypeptide chain. kDa approximate weight:
Answers
One single amino acid weighs 110 D a. Now, this problem is fairly simple. The way we find out, the weight of 701 amino acids is just multiplying. Ah, that number by 110. So all we have to dio is multiply 682 by 110. So our final answer will be 77,110.
What is amino acid?Amino acids are the building blocks of protein. Proteins are long chains of amino acids. Your body has thousands of different proteins that each have important jobs. Each protein has its own sequence of amino acids. The sequence makes the protein take different shapes and have different functions in your body.You can think of amino acids like the letters of the alphabet. When you combine letters in various ways, you make different words. The same goes for amino acids — when you combine them in various ways, you make different proteins.Amino acids are molecules used by all living things to make proteins. Your body needs 20 different amino acids to function correctly. Nine of these amino acids are called essential amino acids. Essential amino acids must be consumed through the food you eat. Essential amino acids can be found in a variety of foods, including beef, eggs and dairy.To learn more about molecules refer to:
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The empirical formula of a chemical substance is c2h3. the molar mass of a molecule of the substance is 54.091 g/mol. what is the molecular formula of the chemical substance? a. c2h4 b. c4h8 c. c4h6 d. c6h9
Answers
The molecular formula of the chemical substance is C2H3 * 2.068 = C4H6 which is option (c)
The empirical formula of a chemical substance gives the lowest whole-number ratio of atoms in a molecule. The molar mass of a substance is the mass of one mole of the substance. To find the molecular formula of a substance, we need to determine the ratio of atoms in the molecule and compare it to the ratio given by the empirical formula.
The molar mass of the substance is 54.091 g/mol, and the empirical formula is C2H3. To find the molecular formula, we can divide the molar mass by the molar mass of the empirical formula.
54.091 g/mol / (2 x 12.011 g/mol + 3 x 1.008 g/mol) = 54.091 g/mol / 26.042 g/mol = 2.068
Since the ratio of atoms in the molecule is 2.068 times that of the empirical formula, the molecular formula is C2H3 * 2.068 = C4H6 which is option (c)
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Answer:
C4H6 (c)
Explanation:
I took the test
Draw the Lewis structure for Ato3 and use it to answer the following questions:
a) Predict the approximate bond order between At and O:__
b) Predict the hybridization of the central atom:__
Answers
The approximate bonding order of At and O can be predicted using the Lewis structure of Ato3
How does Lewis structure rule work?Lewis structure, also known as electron-dot framework, is a physical formula in which dots serve as placeholders for electrons; two dots across two atoms signify a covalent link. Gilbert Newton Lewis, the man behind its 1916 introduction, gave it its name.
What is a Lewis structure read like?The Lewis structure of water, or H2O, is shown here as an example. The atom's core electrons are represented by each symbol, along with the nucleus. A hydrogen atom's nucleus is represented by each "H" in this diagram, and an oxygen atom's nucleus and two core electrons are represented by each "O". The valence electrons in the dots are not in bonds.
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which group is selected as secondary suffix if -OH and -CHO both are present in same compound
Answers
In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula -OH and consists of an oxygen atom covalently bonded to a hydrogen atom. In organic chemistry, alcohols and carboxylic acids contain one or more hydroxyl groups. In organic chemistry, an aldehyde is an organic compound containing a functional group with the structure R-CH=O. The functional group itself is sometimes called an aldehyde, but it can also be classified as a formyl group. Aldehydes are ubiquitous and play an important role in technology and biology. The group priority is -OCH3>OH>COOH>CHO. According to the F. Cahn-Ingold-Prelog system, a priority (1, 2, 3, or 4) is assigned in descending order of atomic number to the atoms directly bonded to the stereocenter the atom with the highest atomic number gets the highest priority.
These pea plants have been in the sunlight since early morning.
What can the pea plants do because they are in sunlight? What does this mean for the number of energy storage molecules in the pea plants?
Answers
Pea plants uses the light energy from sun for photosynthesis and they synthesis chemical energy in leaves.
What is photosynthesis ?Photosynthesis is a biochemical process taking place in green plants to synthesis energy with the aid of light energy. The green pigments chlorophyll absorbs enough light energy for this biochemical reactions.
The photosynthetic reaction is the reaction between water and carbon dioxide producing glucose and oxygen. Thus, this process intakes carbon dioxide that we exhale and release oxygen that aids our respiration.
Pea plants are green plants undergoing photosynthesis. They uses light energy to produce chemical energy. With the presence of sunlight, they can easily carry photosynthetic reaction in leaves.
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Draw the lewis structure for resonance forms of acetamide (CH3CONH2)
Answers
The Lewis structure for acetamide is drawn by connecting the atoms with single bonds and assigning lone pairs of electrons to the non-bonding atoms.
The central carbon atom has four bonds and no lone pairs, while the oxygen atom has two bonds and two lone pairs. The two nitrogen atoms each have three bonds and one lone pair. The hydrogen atoms only have one bond each, as they only have one electron in their outer shell.
For the resonance forms of acetamide, the Lewis structure is drawn by connecting the atoms using double bonds instead of single bonds, while keeping the same number of lone pairs.
This forms a resonance hybrid between the two forms, where the electrons are delocalized. The central carbon atom has two double bonds and no lone pairs, while the oxygen atom has one double bond and two lone pairs. The two nitrogen atoms each have two double bonds and one lone pair. The hydrogen atoms also only have one bond each.
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What is the number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen? 3 H2+ N2 <-----> 2 NH3 a. 24 x 10^23 b. 6 x 10^23 c. 12 x 10^23 d. 18 x 10^23
Answers
The number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen is 12 × 10²³ molecules.
The reaction is given as :
3H₂ + N₂ ⇄ 2NH₃
Mass of the hydrogen = 6 g
moles of the hydrogen = mass / molar mass
= 6 / 2
= 3 mol
3 moles of the H₂ produces 2 moles of the NH₃
moles of the NH₃ = (2 / 3) × 3
= 2 mol
1 mol = 6.022 × 10²³ molecules
molecules of the ammonia, NH₃ = 2 × 6.022 × 10²³ molecules
= 12 × 10²³ molecules
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The atomic mass of the element niobium (Nb) is 92.906 amu. Which measurement is correct?(1 point)
Responses
1 mole of Nb = 92.906 grams
1 mole of Nb = 92.906 grams
1 gram of Nb = 92.906 moles
1 gram of Nb = 92.906 moles
1 gram of Nb = 92.906 atoms
1 gram of Nb = 92.906 atoms
1 mole of Nb = 92.906 atoms
Answers
Niobium has an atomic mass of 92.90638 u. An atomic mass unit serves as the unit of measurement for mass (amu). A mass unit of an atom is 1.66 x 10-24 grammes.
What does the term "atomic" refer to?
Atomic is derived from the Greek word atomos, which means "uncut" or "indivisible," and means "indivisible particle" in Latin. atomic is defined as an adjective that refers to, contains, or is related to atoms.
What does atomic energy entail?
Nuclear energy, also known as atomic energy, is the considerable quantity of energy released in operations that have an impact on atomic nuclei, or dense centres of atoms. It differs from other atomic phenomena' energy, which solely involves an atom's orbital electrons in regular chemical reactions, for example.
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Answer:
1 mole of Nb = 92.906 grams
Cyanides inhibit lactose permease by A. Competing with lactose for the binding site on permease B. Abolishing the lactose gradient between the inside and outside of the cell C. Abolishing the proton gradient between the inside and outside of the cell D. Blocking conformational changes of the transporter B A
Answers
Cyanides inhibit lactose permease by abolishing the proton gradient between the inside and outside of the cell
By interfering with the proton gradient across the cell membrane, cyanides prevent the lactose permease protein from transporting lactose across the membrane. Protons (H+) are pumped out of the cell by the proton-motive force, which results in a difference in proton concentration between the inside and outside of the cell and creates the proton gradient.
This proton gradient is used by lactose permease to propel lactose transport into the cell. The enzyme cytochrome oxidase, which is found in the mitochondria and is in charge of the last stage of the electron transport chain, binds to the iron atom in the active site. This binding prevents the enzyme from working, which inhibits proton pumping and causes the proton gradient to fall, both of which hinder lactose permease from working.
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write the lewis structure for Ne. draw the particle by placing atoms on the grid and connecting them with bonds. include all lone pairs of electrons and nonbonding electrons
Answers
Lewis dot structure is used to represent the lone pairs of electrons and bonded pair of electrons in an atom or a molecule of an element.
The Lewis dot structure of an atom or molecule shows the valence shell electrons around the symbol of the element. The valence electrons are written in pairs and are written as dots. Neon belongs to the 18th group of the periodic table and thus is a noble gas. It has eight valence electrons. Lewis structures is also known as Lewis dot structures or electron dot structures are diagrams that represent the valence electrons of atoms within a molecule. The Lewis symbols and Lewis structures help visualize the valence electrons of atoms and molecules whether they exist as lone pairs or within bonds.
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A person uses 720 kcal on a long hike. Calculate the energy used for the hike in each of the following energy units. A.) joules B.) kilojoules
Answers
A person uses 720 kcal on a long bike. A. The energy in joules is equal to 3221680 Joules. B. The energy in kilojoules is 3221.689 KJ.
What is energy ?
The term energy is defined as the capacity for doing work. It is exist in different types like potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.
Given the energy used for the bike is 770 kcal.
We know that
1 cal = 4.184 J
The energy in Joules = 770 × 1000 × 4.184
= 3221680 J
The energy in kilojoules = 3221689 / 1000
= 3221.689 KJ
Thus, A. The energy in joules is equal to 3221680 Joules. B. The energy in kilojoules is 3221.689 KJ.
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what is the word equation for CS2(1)+3O2(g)->CO2(g)+2SO2(g)
Answers
Answer:
liquid carbon disulfide and oxygen gas produce carbon dioxide gas and sulfur dioxide gas
Explanation:
If 25.0 ml of a 2.0 m naoh solution is used for the reaction
Answers
To solve this problem is not necessary to have the chemical reaction. Just use the formula of Molarity and solve it for moles.
moles = 0.2 x 0.025=0.005.
Define mole?In the International System of Units, a substance's amount is measured in moles, which are denoted by the sign mol. The quantity of a substance is a measurement of the number of elementary entities of a specific substance present in an object or sample. Exact 6.022140761023 elementary items are required to define a mole.The unit of measurement known as the mole (symbol: mol) refers to the quantity of matter in a system that includes the same number of atoms as there are in 0.012 kilograms of carbon 12.Previously, a mole was defined as the quantity of atoms found in 12 grams of carbon-12, as determined through experimentation.The complete question is:
NaOH (aq) + HCl(aq) H2O + NaCl (aq)
If 25.0 mL of a 0.2 M NaOH solution is used for the reaction
shown above, how many moles of NaOH were involved in the
reaction? _moles.
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The number of moles for the chemical reaction will be equal to 0.005, if 25.0 ml of a 2.0 m NaOH solution are used.
What is mole?The amount of a material is expressed in moles, which are represented by the symbol mol in the International System of Units. A substance's amount is a measurement of how many of its fundamental components are present in an object or sample. To define a mole, precisely 6.022140761023, elementary components are needed.
The term "mole" (symbol: mol) refers to the amount of matter in a system that contains the same number of atoms as there are in 0.012 kilograms of carbon 12. Previously, a mole was determined through experimentation to be the number of atoms present in 12 grammes of carbon-12.
Determine the number of moles:moles = 0.2 x 0.025=0.005.
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The complete question is:
NaOH (aq) + HCl(aq) H2O + NaCl (aq)
If 25.0 mL of a 0.2 M NaOH solution is used for the reaction
shown above, how many moles of NaOH were involved in the
reaction? _moles.
C. If you were to measure out 0.0237 moles of potassium nitrate into a clear, dry cup. How
many grams are in this sample? Show your work in the space below.
Molar mass of KNO3:
Answers
The molar mass of potassium nitrate is 101 g. Thus the mass of 0.0237 moles of potassium nitrate is 2.39 grams.
What is molar mass ?The mass of one mole of a compound is called its molar mass. A compound containing 6.022 × 10²³ atoms is called one mole of the compound.
Mass of potassium = 39 g/mol
mass of nitrogen = 14 g/mol
mass of oxygen = 16 g/mol
mass of 3 O = 48 g
molar mass of KNO₃ = 48 + 39 + 14 = 101 g/mol
The mass of one mole of KNO₃ is 101 g. Then mass of 0.0237 mole is:
0.0237 × 101 = 2.39 g.
Therefore, the mass of 0.0237 moles of potassium nitrate is 2.39 g.
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A gas at 600 torr and 300 K is heated to a final volume of 1000 torr. What is the final temperature of the gas?
Answers
Answer:
500K
Explanation:
We use Charle's law that states that at a constant pressure the volume of a given mass of a gas varies linearly with absolute temperature of the gas.
V ∝ T
V = kT
∴ k is the proportionality constant
v/T = as it a ratio between volume and temperature the value of k would be a constant quantity.
Therefore it can be written as:
v1 / T1 = V2 / T2
Now solving the question:
V1 = 600 torr
T1 = 300 K
V2 = 1000 torr
T2 = ?
600/300 = 1000/T2
T2= (1000 x 300)/600
T2= 500 K
PLS HELP ME ASAP I NEED HELP PLS PLS PLS PLS PLS PLS PLS PLS PLS PLS
Answers
The balanced chemical reaction of sodium and sulfur can best be described as: B. 2Na(s) + S(s) → Na₂S(s)
How can the reaction be represented?To represent the reaction between sodium and sulfur, we would express the elements and their states as shown above. So, 2 atoms of sodium would react with 1 atom of sulphur to yield a compund known as sodium sulphide.
This compound contains two atoms of sodium and 1 atom of sulphur. The physical state is solid. So, the correct option number that expresses this is B.
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what is the percent composition of hcl by numbers of atoms?
Answers
Answer:
H is 2.74%
Cl is 97.24%
Explanation:
HCl molar mass is 36.458
H is 1 so 1/36.458 is .0274 or 2.74 percent
Cl is 35.453 so 35.453/36.458 is .9724 or 97.24 percent
A 0.32 m aqueous solution of an unknown solute has a density of 1.08 g/ml. the molar mass of the solute is 146.8 g/mol. What is the molality of this solution?
Answers
According to molar concentration , the molality of the solution up to second decimal place is 0.31 m.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.molarity = 0.32 mol of solute / 1 L solution.To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg. To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution. To find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water.Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kgThus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kgTo learn more about molar concentration refers to:
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According to molar concentration, the molality of the solution up to second decimal place is 0.31m.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution. Most commonly used unit for molar concentration is moles/liter. The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.
The use of molarity.Understanding a solution's molarity is important since it allows you to determine the actual concentration as well as whether the solution is diluted or concentrated. Measures of solution concentration include molality and molarity.
Determination of molality:Molarity = 0.32 mol of solute / 1 L solution.
To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg.
To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution.
To find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water.
Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg
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a 0.32 m aqueous solution of an unknown solute has a density of 1.08 g/ml. the molar mass of the solute is 146.8 g/mol. what is the molality of this solution? report your answer in mol/kg and round to the second decimal place.
Answers
Answer: 0.31
Explanation:
molarity = 0.32 mol of solute / 1 L solution
find kg of solute: 0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg
find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution
find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water
molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg
According to molar concentration , the molality of the solution upto second decimal place is 0.31 m.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.
molarity = 0.32 mol of solute / 1 L solution.To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg. To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution. To find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water.
Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg.
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A 0.1 m solution is diluted by three orders of magnitude. what is the new concentration?
Answers
So the new concentration of the solution is 0.0001M.
What is magnitude?A magnitude is the measurement or absolute value of a quantity. A magnitude is represented by a positive real number. Put simply, a magnitude is the size of some quantity. For example, the magnitude of an earthquake, measured on the Richter scale, usually varies between 1 and 10 and represents the size of the earthquake. An earthquake with a magnitude of 8 is much more trouble than an earthquake with a magnitude of 3.The magnitude of a number, unlike the magnitude of a physical quantity, is not relative to a scale or set of units: the magnitude of 100 is 100. By contrast, the magnitude of a ruler is 12 in inches but is 30.48 in centimeters. Outside of pure mathematics one has to be careful to specify the units in which the magnitude of some quantity is measured.To learn more about magnitude refer to:
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Next, the chemist measures the volume of the unknown liquid as 1870. cm³ and the mass of the unknown liquid as 1.17 kg.
Calculate the density of the liquid. Round
your answer to 3 significant digits.
Given the data above, is it possible to
identify the liquid?
If it is possible to identify the liquid, do so.
gmL
yes
no
dimethyl sulfoxide
pentane
carbon tetrachloride
glycerol
tetrahydrofuran
X
5.
Answers
Answer:
The density of any given liquid is equivalent to the mass of the liquiddivided by the volume of the liquid.From the given information, we have:The mass of the unknown liquid to be = 972 gThe volume of the unknown liquid to be = 0.610 L = 610 cm³If the formula for calculating Then;The Density of the unknown liquid ≅ 1.593 g/cm³In conclusion, the density of the unknown liquid is 1.593 g/cm³ to 3 significant figures.
Explanation:
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Classify the compounds as acids, bases, or salts.
Acid
HF
NH4Cl
H2C204
H2SO3
Base
Ca(OH)2
NaF
RbOH
Salt
CaCl2
Answers
Answer: Jhon cena licked my
Explanation:
HF, H[tex]_2[/tex]C[tex]_2[/tex]0[tex]_4[/tex] , H[tex]_2[/tex]SO[tex]_3[/tex] are acid. Ca(OH)[tex]_2[/tex], RbOH are base. NH[tex]_4[/tex]Cl, NaF, CaCl[tex]_2[/tex] are salts, among all the given options.
Numerous acids and bases are found in nature on a regular basis, including citric acid in citrus fruits like oranges and lemons, tartaric acid and tamarind, malic acid the apples, lactic acid and milk and dairy products, and hydrochloric acid and gastric fluids. Similar to acids, several bases are present, including lime water. In our daily lives, we utilise several of these acids, like vinegar and acetic acid within the kitchen, lactic acid for washing clothes, baking soda for cooking, washing soda to cleaning, etc. HF, H[tex]_2[/tex]C[tex]_2[/tex]0[tex]_4[/tex] , H[tex]_2[/tex]SO[tex]_3[/tex] are acid. Ca(OH)[tex]_2[/tex], RbOH are base. NH[tex]_4[/tex]Cl, NaF, CaCl[tex]_2[/tex] are salts,
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Predict Considering the patterns you have identified, estimate the likely melting
points of cadmium (Cd), vanadium (V), and cobalt (Co). Enter your estimates in
the figure.
Answers
Give a handwritten explanation and response. Estimate the expected melting temperature of cadmium (Cd), vanadium, and other elements based on the patterns you have found.
What does melting point mean?
The temperature at which a pure substance's solid and liquid states can coexist in equilibrium is known as the melting point. A solid's temperature will rise when heat is added to it until its melting point is reached.
How do melting and boiling points differ?
The melting point
The temperature that a quality of output into a liquid under normal air pressure is known as the melting point. The temperature at which a liquid's vapor pressure equals the pressure around it, turning the liquid into vapor (and vice versa).
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What happened for the model of the atom to change?
Answers
The atomic model changes over time because the atomic model was based on theories and discoveries.
Dalton's Atomic ModelThe simplest atomic model is the Dalton atomic model, which was put forward by John Dalton, a British scientist. According to this atomic model, atoms are solid balls that have no charge. In addition, according to this atomic theory, the atom is the smallest unit that cannot be divided again. Different chemical elements will have different types of atoms.
Unfortunately, Dalton's theory cannot explain how atoms as solid balls can conduct electric current. In fact, electricity is electrons in motion. He could not prove other particles that conduct electric current. Dalton's theory was followed hundreds of years later until it was finally broken by later scientists.
Thompson's Atomic ModelThe second atomic model is the Thompson atomic model. As the name implies, this atomic model was discovered by Joseph John Thompson. Thompson's atomic model is shaped like a raisin bun. That's because the atom is a positively charged solid ball with negative particles (electrons) scattered in it. In addition, the number of positive and negative charges on the atom is the same. This atomic model was proven by Thomson's research using cathode ray tubes.
Unfortunately, Thomson's model of the atom cannot explain the arrangement of positive and negative charges in an atom.
Rutherford's Model of the AtomRutherford's atomic model put forward by Ernest Rutherford in 1911. In this atomic theory, each atom contains a positively charged atomic nucleus with electrons surrounding it in its trajectory. In addition, this atomic mass is concentrated in the atomic nucleus and most of the atomic volume is empty space, you know. This was proven from the results of an experiment on firing metal by alpha rays, which is also known as the Geiger-Marsden Experiment.
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How many mL of a 2.63 M solution do you need to dilute to 100 mL with a final concentration of 0.48
Answer is= 18.25/ How?
Answers
18.25 mL of a 2.63 M solution you need to dilute to 100 mL with a final solution concentration of 0.48.
The amount of a substance is often measured by how much it weighs – i.e. in g or mg or kg etc. The concentration is the amount divided by the volume it is dissolved in. concentration = amount divided by volume
Another way of representing the amount of a substance is to use the concept of mole. A mole is simply 6.0223 x 1023 molecules (this is “Avogadro’s number”)
Eggs come in dozens (12), molecules come in moles (6 x 1023) The mass of a mole of molecules is the formula weight in grams. This is sometimes called “molar mass” with symbol M. Sometimes it is referred to as molecular weight. Sometimes it is called “relative molecular mass” since the mass of a carbon element is designated to be 12 and other molecules or elements are given masses relative to that.
The molar mass of a small molecule such as an amino acid (eg glycine is NH2CH2COOH and has molecular mass = 75.07 g.mol-1) is much less than the molar mass of a protein (eg haemoglobin has molecular mass ~ 64500 g.mol-1).
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The Coriolis effect is the deflection of moving objects from a straight path due to Earth's rotation. Which of the following is the result of the Coriolis effect?
Answers
The result of the Coriolis effect is the rotation of the earth on its axis. So the correct option is B.
What is the Coriolis effect?The Coriolis effect is a type of force to which the fluids of the earth are exposed. It is the acceleration they receive due to the rotation of the earth, what is generated is a deviation in their trajectory which now causes their trajectory to be curved. This force it is exposed to is called the coriolis force, but it is not a real force since there is nothing pushing on it.
The acceleration to which the fluids are exposed will be perpendicular to the axis of rotation of the earth and to the components of its velocity.
Therefore, we can confirm that the correct option is B. the rotation of the earth on its axis.
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The Coriolis effect is the result of which of the following?
A. winds spinning off the equator
B. the rotation of the earth on its axis
C. the different air movements north and south of the equator
D. the friction that slows down winds near the earth’s surface
A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute.
Answers
A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute. The expression to determine the number of gallons left in the tank after m minutes is 35- m/4.
Considering that a 35-gallon water tank leaks at a rate of a quarter per minute.
Let "m" stand for the duration in minutes.
Gallons remaining in the tank equal the sum of the water that was originally inside and the water that has leaked.
35 gallons of water are still available after subtracting the amount of minutes spent at the rate of leakage.
Water remaining in gallons = 35 gallons - m minutes x 1/4
Water remaining in gallons = 35 - m/4
Your question is incomplete but most probably your full question was
A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute. Write an expression to determine the number of gallons left in the tank after m minutes.
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Classify each statement as true or false. Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help Period 3 elements have The valence electrons of group 5A The highest principal quantumThe valence electrons of group 2A six 2p electrons elements are in the 6s subshell. number of period 2 elements is 2. elements are in an s subshell. Period 4 elements have an completely full outer principal shells. inner electron configuration of [Ar]. number of period 3 elements is 4. Group 8A elements have The highest principal quantum Period 5 elements have an inner electron configuration of [Xe]. True False
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The following are the true statements: Period 3 elements have The valence electrons of group 5A The highest principal quantum The valence electrons of group 2A six 2p electrons elements are in the 6s subshell. number of period 2 elements is 2
Valence electrons are placed in the outer most orbit of the atom and that orbit (shell) is called the valence shell. Let‟s take an example to identify them. Write the configuration of Oxygen 8O : 1s2 , 2s2 , 2p4
Oxygen has 6 electrons in its outer most orbit (2+4) that means it has 6 valence electrons and orbit 2 is called the valence shell. Now place these electrons in orbitals of their respective sub-shell.
Oxygen has 6 valence electrons and it needs 2 more electrons to achieve octet. The number of electrons needed to complete octet is termed as the valency of an element. This value can be obtained by subtracting the number of valence electrons from octet (8). So, the valency of Oxygen is 2. That means Oxygen is ready to share its 2 valence electrons or ready to accept 2 more electrons in order to achieve octet.
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