Arrange the liquids pentane (CH3CH2CH2CH2CH3), pentanol (CH3CH2CH2CH2CH2OH), and pentanal (CH3CH2CH2CH2CHO) in order of decreasing viscosity, surface tension, and boiling point.
Rank from highest to lowest viscosity, surface tension, and boiling point.
Answer:
Following are decreasing order to this question:
Explanation:
Viscosity and surface tension both are inter-molecular by nature (IMFs)
The pentane becomes non-polar and just not H-bondable, so LDF alone would be likely (London Dispersion Force)
Pentanal, but H-bond => is impossible (Dipole-Dipole)
Pentanol is also an OH group, so H-bond => is probable (Hydrogen Bonding)
Higher air tension and viscosity than higher IMFs (because the atoms of fluids are more drawn). To lower the IMF (and therefore the viscosity/surface stress decreases)
pentanol
pentanal
pentane
What is the correct name for Cr2O3?
A. Chromium trioxide
B. Chromium(III) oxide
C. Dichromium trioxide
D. Chromium(II) trioxide
What is the volume of 0.05 mol of neon gas at 1.45 atm and 275K?
Answer:
sdasdasddsafsadsfds
Explanation:
Define atmosphere and list any three ways in which
the atmosphere is useful for the survival of living
things.
Answer:
Explanation:
Atmosphere - the envolpoe of gasses sourounding the earth or another planet or the air in any particular place. The atmosphere protects us from the suns harmful rays, carrys cloud full of water so it can rain all over the world, and have oxygen, which is nessecary for survival to all living things.
How many
neutrons would
be found in
carbon-15 if it
were to exist?
Show your work.
Answer:
8 neutrons
A is the number of neutrons plus protons in the nucleus. However, we already know that there are 7 protons. Therefore, there must be 8 neutrons in the nucleus to add up to 15. Table 3.
Element Symbol Number of Neutrons
carbon 146C 8
nitrogen 147N 7
157N 8
oxygen 168O 8
Explanation:
Answer please I need help
Answer:
Explanation::::
Choose the more metallic element from each pair.
a . Sr or Sb,
b. As or Bi,
c. Cl or O,
d. S or As
Answer:
c
Explanation:
CI or O
Carla Vista Company has the following information available for September 2020.
Unit selling price of video game consoles $410
Unit variable costs $328
Total fixed costs $36,900
Units sold 600
Compute the unit contribution margin.
Unit contribution margin enter the unit contribution margin
Prepare a CVP income statement that shows both total and per unit amounts.
Compute Carla Vista’ break-even point in units.
Break-even point in units enter Break-even point in units units
Prepare a CVP income statement for the break-even point that shows both total and per unit amounts.
The more metallic element pair is Cl or O. Therefore, option C is correct.
What is metallic element ?Except for hydrogen, which is a nonmetal, the elements are arranged in a triangle with the metals to the left, the nonmetals to the right, and the metalloids to the immediate right of the triangle.
Metal atoms are bound together by metallic bonds to form solids known as metallic solids. Metal solids include things like copper, gold, and zinc, for instance. Since cesium is the last naturally occurring alkali metal, it has the most metallic characteristics.
The non-metal components, like as rock and rubbish, are subsequently removed from the ore during processing. The subsequent melting and combining of various metal components yields metal alloys. A solid metal alloy substance is produced when the freshly combined metal compound has cooled.
Thus, option C is correct.
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MQ : Which parts of the brain had most likely been affected?
Answer:
the cerebrum
Explanation:
answer is A
5.6 g of an organic compound on burning with excess
of oxygen gave 17.6 g of CO2, and 7.2 g of H,O. The
organic compound is :
Answer:organic compound is : C₄H₈
Explanation: The equation of the reaction of the organic compound burning with excess oxygen gives us the general equation as
C xHy + 1/2(x+ y/2 )O₂ → xCO₂ + y/2H₂O
We first find the number of moles of CO₂ and H₂O
Number of moles of CO₂= Mass/ molar mass
= 17.6g/ 44g/mol ( 12+ 16 x2)
=0.4 moles
Number of moles of H₂O= Mass/ molar mass
= 7.2g/ 18g/mol ( 1 X 2+ 16)
=0.4 moles
From the reaction , we can see that
x = 0.4
and [tex]\frac{y}{2}[/tex]= 0.4 such that y= 0.4 x 2= 0.8
Their ratios become
[tex]\frac{x}{y}[/tex] =[tex]\frac{0.4}{0.8}[/tex]= [tex]\frac{4}{8}[/tex]
Therefor the organic compound CxHy = C₄H₈
The student recorded the mass of the cup + sample incorrectly and started with 2.20 g of hydrated compound but used 2.00 g in the calculations. Explain how this error will affect the calculation for the number of moles of water in the hydrate? Will the final answer be artificially high or low? How do you know?
Answer:
low
Explanation:
We were informed in the question that the student had incorrectly recorded the mass of cup + sample as 2.20 g but inadvertently used 2.00 g in the calculations.
This error will cause a slight decrease in the mass of water and ultimately decrease the number of moles of water in the hydrate.
What i am saying is that the number of moles of water obtained in the calculation will be artificially low.
Which substance is one that cannot be separated or broken down into simpler substances by chemical means? (Element, pure)
table salt (NaCl)
gold wire (Au)
candle wax (CH2O)
water vapor (H2O)
Answer:
gold wire (Au)
Explanation:
A substance that cannot be separated or broken down into simpler substances by chemical means is an element.
Between the given options only gold wire is an element, Au.
A way of knowing that it is an element is noticing that its formula is a single symbol which corresponds to an element found in the periodic table, unlike a combination of said symbols (like NaCl or H₂O).
When Aluminum oxide is heated with iron no reaction takes place?
Answer:
Explanation:
That's correct. Once Aluminum becomes an ion, it is very hard to force it to take back its electrons. Only a few elements can do it. Iron is not one of them.
2. How does an atom become an Ion
Find the total mass in kilograms of a ring that contains a 5.0 x 10 -1 carat diamond and 7.00 grams of gold.
Answer:
49 вот правильный ответ
The foam football Coach Johnson left in his chair will stay there until he
moves it to sit in the chair.
A. Newton’s first law
B. Newton’s second law
C. Newton’s third law
Answer:
B. Newton’s second law
Explanation:
correct me if im wrong
Answer:
Its c newton third law
Explanation:
His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.
Compare land cover and land use, explaining how they are related and describing one way that humans can affect that relationship.
Answer:
Land covers refer to all the manufactured structures and vegetation that covers the land it includes all vegetation including plants, shrubs, trees, and other man-made structures too.
On other hand, Land use is the term that explains the use of the land by the different human activities that are occurred on land that are directly related to the land.
Land cover influences land use by utilizing particular land such as parks, ponds, or other uses according to the land. and humans can cause changes in both when they urbanize the area or land.
20 POINTS! NEED HELP
How many electrons does sulfur have to gain to achieve the Octet Rule?
1. 1 electron
2. 2 electrons
3. 3 electrons
4. 4 electrons
Answer:
Sulfur needs 2 more electrons to achieve octet in its valence shell.
Explanation:
According to the electronic configuration, 2 electrons are required to be gained by the sulfur to achieve the octet rule.
What is electronic configuration?
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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Mass of hydrated copper sulfate in CuSo4.5H2O
Answer: Molar mass of [tex]CuSO_4.5H_2O[/tex] is 249.68 g/mol.
Explanation:
Molar mass is the mass of 1 mole of the molecule. It is calculated by adding masses of all the atoms in the given molecule.
[tex]CuSO_4.5H_2O[/tex] contains one atom of copper , 1 atom of sulphur, 9 atoms of oxygen and 10 atoms of hydrogen
Mass of copper = 63.5 g/mol
Mass of sulphur = 32.06 g/mol
mass of oxygen = 16.00 g/mol
Mass of hydrogen = 1.008 g/mol
Thus mass of [tex]CuSO_4.5H_2O[/tex] = 63.5(1)+32.06(1)+16.00(9)+1.008(10)=249.68 g
Molar mass of [tex]CuSO_4.5H_2O[/tex] is 249.68 g/mol.
What type is hydropower?
Answer:
Hydroelectric energy, also called hydroelectricity or hydropower, is a form of energy that uses the power of flowing water to generate electricity. There are three main types of hydroelectric energy: impoundment, diversion, and pumped storage.
Explanation:
Most of the sulfur used in the United States is chemically synthesized from hydrogen sulfide gas recovered from natural gas wells. In the first step of this synthesis, called Claus process, hydrogen sulfide gas is reacted with dioxygen gas to produce gaseous sulfur dioxide and water. Suppose a chemical engineer studying a new catalyst for the Claus reaction finds that 450 liters per second of dioxygen are consumed when the reaction is run at 264 degrees Celsius and 0.48 atm.
Required:
Calculate the rate at which sulfur dioxide is being produced. Give the answer in kg per second.
Answer:
[tex]0.21\ \text{kg/s}[/tex]
Explanation:
P = Pressure = [tex]0.48\ \text{atm}=0.48\times 101325\ \text{Pa}[/tex]
V = Volume = [tex]450\ \text{L/s}=450\times 10^{-3}\ \text{m}^3/\text{s}[/tex]
R = Gas constant = [tex]8.314\ \text{J/mol K}[/tex]
T = Temperature = [tex](264+273.15)\ \text{K}[/tex]
The reaction is
[tex]2H_2S+3O_2\rightarrow 2SO_2+2H_2O[/tex]
From ideal gas equation we have
[tex]PV=nRT\\\Rightarrow n=\dfrac{PV}{RT}\\\Rightarrow n=\dfrac{0.48\times101325\times 450\times 10^{-3}}{8.314\times (264+273.15)}\\\Rightarrow n=4.9\ \text{mol}[/tex]
Moles of [tex]SO_2[/tex] produced is
[tex]\dfrac{2}{3}\times 4.9=3.267\ \text{moles}[/tex]
Molar mass of [tex]SO_2[/tex] = 64.066 g/mol
Production rate is
[tex]3.267\times 64.066=209.3\ \text{g/s}=0.21\ \text{kg/s}[/tex]
The rate at which sulfur dioxide is being produced [tex]0.21\ \text{kg/s}[/tex].
Which event increases the amount of dissolved oxygen in the ocean water?
A. El Nino
B. La Nina
C. spring tides
D. Neap tides
Answer:
I think it is Ea Nino I may be wrong though dont hold me to it
What specifically causes the vaporization of the lower boiling liquid on the packing in a fractional distillation
Answer:
Fractional distillation works because the various liquids have different points of boiling. When heating the mixture: As they enter a column below their boiling point temperature, vapors condense. Fluid flows from the column
Explanation:
I need help please my teaching is going to go crazy if I didn’t do it
Answer:
No One is going to answer all this because it hard to type it all in her. its easy to search it up
Explanation:
Is this the correct formula for magnesium acetate? Mg(C2H3O)2
Answer:
no
Explanation:
magnesium acetate= Mg(C2H3O2)2
Bond energies can be used to estimate the energy of a reaction. Why is this only an estimate?
A) It's difficult to measure such a smal amount of energy.
B) The bonds in all molecules are the same, but not all molecules have bonds that are easily measured.
C)The same bond in a different molecule has a different energy. For example, O-H in water versus ethanol has different energies.
D) It's difficult to isolate an individual bond.
Answer:
C)The same bond in a different molecule has a different energy. For example, O-H in water versus ethanol has different energies.
Explanation:
This is true going by the the statement about the bond energies and the bonding being different among the various elements. In the example given which is between ethanol and water, the bonds which exist among the elements is stronger in water than in ethanol. That is why, ethanol is easily combustible than water.
Answer:
The same bond in a different molecule has a different energy. For example, O-H in water versus ethanol has different energies.
Explanation:
Match one graph shown at right to each of the gas laws named below.
Charles's law: a, c, d, e (b is incorrect)
Gay-Lussac’s law: a, b, d, e (c is incorrect)
Boyle’s law: b, c, d, e (a is incorrect)
Answer:
DBE
Explanation:
Cause I got it right
The correct options for Charles's law, Gay-Lussac's Law and Boyle's law are D, B and E respectively.
Charles's law states that, under the assumption of constant pressure, the volume of a gas increases or decreases with its temperature. As the temperature increases, the gas molecules move more quickly and occupy more space, increasing the volume of the gas.
Gay-Lussac's law states that, assuming a constant volume, the pressure and temperature of a gas are exactly related. Increasing temperature causes the gas molecules to become more kinetically energetic and collide with the walls of the container more frequently, increasing the pressure.
Boyle's law states that at a given temperature, the pressure and volume of a gas are inversely proportional. The reduced volume forces the gas molecules into a smaller area, increasing the chance of collisions with the container walls and pressure.
Therefore, the correct options for Charles's law, Gay-Lussac's Law and Boyle's law are D, B and E respectively.
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How many molecules are in 17 grams of sodium chloride? Show your work.
Can someone help with this one?
Which molecular compound is composed of the greatest number of atoms?
A. Carbon Dioxide
B. Dinitrogen Monoxide
C. Potassium Phosphide
D. Sodium Chloride
Answer:
Answer:
Potassium Nitride is composed of the greatest number of atoms.
Explanation:
find the number of atoms present in each compound we will write down their molecular formulas and then we will add up the number of atoms present in them.
A: Dinitrogen Monoxide:
Chemical formula of Dinitrogen Monoxide is N₂O. Therefore, it contains two atoms of Nitrogen and one atom of oxygen Hence, in total it contains 3 atoms.
B: Sodium Chloride:
Chemical formula of Sodium Chloride is NaCl. Therefore, it contains one atom of Sodium and one atom of Chlorine Hence, in total it contains 2 atoms.
C: Potassium Nitride:
Chemical formula of Dinitrogen Monoxide is K₃N. Therefore, it contains three atoms of Potassium and one atom of Nitrogen Hence, in total it contains 4 atoms.
D: Carbon Dioxide:
Chemical formula of Carbon Dioxide is CO₂. Therefore, it contains one atom of Carbon and two atoms of Oxygen Hence, in total it contains 3 atoms.
Explanation:
There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.55%. A weighted average uses the percentages of each isotope to scale their contribution to the total mass. Each isotope's contribution is the percentage (in decimal form) multiplied by the mass of the isotope. What is the contribution (in amu) to the weighted average from the X-19 isotope, which has a mass of 19.00 amu
Answer:
2.765amu is the contribution of the X-19 isotope to the weighted average
Explanation:
The average molar mass is defined as the sum of the molar mass of each isotope times its abundance. For the unknown element X that has 2 isotopes the weighted average is defined as:
X = Mass X-19 * Abundance X-19 + MassX-21 * Abundance X-21
The contribution of the X-19 isotope is its mass (19.00 amu) times its abundance (14.55% = 0.1455). That is:
19.00amu * 0.1455 =
2.765amu is the contribution of the X-19 isotope to the weighted average