Answer:
No matter how a seed is planted, the root will orient itself towards the pull of gravity in the downward direction. This is known as geotropism.
Describe the physical properties of matter using the graphic organizer below
indicate whether each property can be used to identify a substance, $6.6.864
Mass
Weights
Mass and Weight
Magnetism
Density
Physical properties such as mass, weights , density can be common for one or more substances hence cannot be used for identification while magnetism is unique for each substance ,hence used for identification.
What are physical properties?Any property which describes the state of a physical system is called as a physical property.Changes in physical properties are used to describe changes between the states. They are often related to as observable properties.
Physical property which can be quantified is a physical quantity. These are also classified further with respect to their directionality. Physical properties are differentiated from chemical properties by the way they determine how a substance behaves in a chemical reaction.
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Calcium phosphate, Ca 3(PO 4) 2, is used to treat calcium deficiencies. What is the molar mass of this compound
Ca3(PO4)2 has a molar mass of 310.18 g/mol.
Molar mass: What is it?The sum of the molar masses of a compound's component parts determines its molar mass. The molar masses of calcium, phosphorus, and oxygen must be added up in order to determine the molar mass of Ca3(PO4)2.
The molar mass of calcium is 40.08 g/mol.
The molar mass of phosphorus is 30.97 g/mol.
The molar mass of oxygen is 16.00 g/mol.
There are 3 moles of calcium, 2 moles of phosphorus, and 8 moles of oxygen in the compound Ca3(PO4)2.
As a result, the formula for calculating the compound's molar mass is: 340.08 + 230.97 + 8*16 = 120.24 + 61.94 + 128 = 310.18 g/mol
Consequently, Ca3(PO4)2 has a molar mass of 310.18 g/mol.
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what is a balanced nuclear equation for power generation?
A balanced nuclear equation for power generation by nuclear fission is given below:
²³⁵₉₂U + ¹₀n ---> ⁹²₃₆Kr + ¹⁴¹₅₆Ba + EnergyWhat is nuclear fission?The process of nuclear fission involves the splitting of an atom's nucleus into two or more smaller nuclei. Even by the energetic standards of radioactive decay, the fission process releases a very high quantity of energy and frequently results in gamma photons.
Nuclear fission is applied in nuclear power generation in a nuclear reactor.
The fissionable nuclear material is separated in the nuclear reactor so that a critical mass cannot exist, and the neutron flux and absorption are controlled to stop the fission reactions. The energy released during fission processes in a nuclear reactor used to generate electricity is trapped as thermal energy and used to heat water and create steam. The steam is utilized to turn a turbine, which powers an electricity-generating generator.
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An inland area has little water or plant life.
What would the climate of this place likely be?
The inland area has a Continental climate.
Inland climates are typically more severe. Summers might be quite hot, and winters could be very frigid. Rainfall can be scarce.
In inland area the water bodies take long time to heat up and cool down, so they absorb all the heat during the spring and summer when the sun is at its greatest before slowly losing it throughout the fall and winter when the temperature starts to drop.
On the other hand, it warms up and cools down far more quickly on land, that's why the inland are more cooler.
Inland absorbs and releases heat energy more quickly than water, inland places typically experience higher temperature variations from day to night and from season to season, so that inland is hotter area also.
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Select the proper IUPAC name for the following compound, including the (R) or (S) designation where appropriate. (2R, 3S)-2.3-difluorohexane (2S, 3R)-2, 3-difluorohexane (2R, 3R)-2, 3-difluorohexane (2S, 3S)-2, 3-difluorohexane
The proper IUPAC name for the compound is (2R,3S)-2,3-difluorohexane.
It is determined by following the IUPAC nomenclature rules for organic compounds. The key points for this are:
Parent Chain: The parent chain is a hexane, which is a six-carbon chain.Position of Substituents: A first substituent is a fluoro group that is on the second carbon of the parent chain, and a second substituent is a fluoro group that is on the third carbon of the parent chain. We use the prefix di- to indicate that there are two substituents.Absolute Configuration: The compound is a chiral compound, meaning that it has non-superimposable mirror images. To indicate the absolute configuration, we assign the priority of the substituents based on the atomic number of the atom directly bonded to the carbon atom of the substituent. The prefix (2R,3S) indicates that the substituent on the second carbon is in the R configuration and the substituent on the third carbon is in the S configuration.Final IUPAC Name: The proper IUPAC name of the compound is (2R,3S)-2,3-difluorohexane.Learn more about IUPAC nomenclature here:
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What are the types of elements answer?
The three types of elements are metals, non-metals as well as metalloids, there are placed in a periodic table.
In a periodic table, metals are placed in s-block and d-block. While non-metals as well as metalloids are placed in p-block. Metals are generally lustrous, malleable as well ductile in nature and are usually hard in nature while non-metals lack these properties. Metalloids are the elements whose chemical as well as physical properties lies between both metals and non-metals. Examples of metals are sodium and potassium. Examples of non-metals are carbon and phosphorus while examples of metalloids are silicon and germanium.
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Determine the electron geometry (eg) and molecular geometry (mg) of NCl3.
O eg=tetrahedral, mg=trigonal pyramidal
O eg=linear, mg=trigonal planar
O eg=tetrahedral, mg=tetrahedral
O eg=linear, mg=linear
O eg=trigonal planar, mg=bent
The correct answer is : Nitrogen's molecule bends into a trigonal pyramidal shape due to the presence of one lone pair of electrons
O eg=tetrahedral, mg=trigonal pyramidal
The electron geometry (eg) of NCl3 is determined by the positions of the electrons around the central atom, nitrogen (N). NCl3 has one lone pair of electrons on nitrogen and three bonding pairs of electrons with chlorine atoms, so the electron geometry is tetrahedral. NCl3's molecular geometry (mg) is determined by the atom positions in the molecule. In a trigonal pyramidal shape, NCl3 has one nitrogen atom in the centre and three chlorine atoms surrounding it. Nitrogen's molecule bends into a trigonal pyramidal shape due to the presence of one lone pair of electrons. Electron geometry, also known as electron pair geometry, is the arrangement of electron pairs in a molecule or ion around a central atom. It is determined by the number of electron pairs surrounding the central atom, which includes both bonding pairs and lone electron pairs. The electron geometry can be used to predict the overall shape of a molecule or ion and also helps to understand the polarity of the molecule.
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What is the outcome when the arrangement of atoms changes in a substance?
When the arrangement of atoms changes in a substance, the properties of the substance can change as well. The different arrangements of atoms can lead to different chemical and physical properties.
For example, if the atoms of a substance are rearranged to form a new compound, the new compound will have different chemical properties than the original substance. A new compound may have a different color, odor, reactivity, or melting point than the original substance.
Changing the arrangement of atoms without changing the chemical composition can change the physical properties. For example, a crystalline solid has atoms or molecules arranged in a regular, repeating pattern. This arrangement gives the material unique properties such as density, melting point, and hardness. If the arrangement of atoms and molecules changes, the properties of solids can also change.
In summary, when the arrangement of atoms in a substance changes, the properties of the substance can also change. Different arrangements of atoms have different chemical and physical properties.
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how many grams of KNO3 that should be placed in the airbag to fully react with the Na.
10 Na + 2KNO3 > 1K20 + 5Na2O + 1 N2 (g)
salt brine in known to deteriorate steel piping system. what substance can be used to counteract ther corrosuve effects
Steel piping systems have a history of degrading under salt brine. It is possible to neutralize their corrosive effects by using sodium dichromate.
For melting snow and ice on sidewalks, parking lots, and roads, salt brine is a practical liquid solution. When the salt content of the water reaches a certain proportion, salt brine is produced in tanks that circulate certain volumes of water and rock salt. After that, the solution is pumped into holding tanks in order to be used. In order to address particular temperature ranges of a storm and improve the application's efficacy, other components like calcium or magnesium may be added.
In advance of winter weather, surfaces are pre-treated with salt brine. If Salt Brine is used ahead of a winter storm, it will start to function as soon as the first snowflake falls and assist prevent the accumulation of snow and ice on the pavement.
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N2 + 3H2 → 2NH3
How many moles of hydrogen, H2, are needed to react with 28 moles of nitrogen, N2?
(round the the tenth's place)
Taking into account the reaction stoichiometry, an amount of 84 moles of H₂ are needed to react with 28 moles of nitrogen.
Reaction stoichiometryIn first place, the balanced reaction is:
N₂ + 3 H₂ → 2 NH₃
By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
N₂: 1 moleH₂: 3 molesNH₃: 2 molesMass of N₂ requiredIt can be applied the rule of three: If by reaction stoichiometry 1 mole of N₂ react with 3 moles of H₂, 28 moles of N₂ react with how many moles of H₂?
moles of H₂= (28 moles of N₂×3 moles of H₂)÷1 mole of N₂
moles of H₂= 84 moles
Finally, 84 moles of H₂ reacted.
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What process makes 2 ATP?
Anaerobic respiration results in the production of 2 ATP molecules.
What is anaerobic respiration?Anaerobic respiration is the use of electron acceptors other than molecular oxygen in respiration. Despite the fact that oxygen is not the ultimate electron acceptor, the process employs a respiratory electron transport chain. When there is insufficient oxygen for some species to respire, they still require energy to survive. Due to a lack of oxygen, they respire in the absence of oxygen to create the energy they require, which is known as anaerobic respiration. While most aerobic respiration (with oxygen) occurs in the cell's mitochondria, anaerobic respiration (without oxygen) occurs in the cytoplasm.
Here,
Two ATP molecules are created during anaerobic respiration.
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A chemist is studying the composition of a sample of ocean water. He gently heats the sample to evaporate the water, leaving him with the solid substances that had been dissolved in the sample. Next, he performs a series of procedures to separate the solid substances from each other. Finally, he measures how much of each solid he has obtained. What substance would he probably have the most of
The substance that he will have the most will be sodium chloride.
More than 70% of the surface of the Earth is covered by seawater, the liquid that makes up the oceans and seas. 96.5 percent of seawater is made up of pure water, 2.5 percent salt, and minor amounts of dissolved inorganic and organic compounds, particles, and a few atmospheric gases.
When a chemist analyzes the composition of a sample and heats it to cause the water to evaporate, he is left with the solid substances that had been dissolved in the sample. Sodium chloride is the most significant salt that is created by ocean water. He next goes through a series of steps to separate the solid materials from one another. The highest substance found in ocean water, according to his measurements, is salt, specifically sodium chloride.
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Carefully feel the sides of the flask. Is the crystallization of sodium acetate endothermic or exothermic? How do you know?
Answer:
It is not possible to determine whether the crystallization of sodium acetate is endothermic or exothermic simply by feeling the sides of the flask. To determine the heat of crystallization, you would need to measure the temperature of the solution before and after crystallization and compare the two values.
The heat of crystallization is defined as the heat absorbed or released during the process of crystal formation from a solution or a melt. If heat is absorbed during the process, the reaction is endothermic and the temperature of the solution or melt will decrease. If heat is released, the reaction is exothermic and the temperature will increase.
In the case of sodium acetate, it is an exothermic reaction, meaning that heat is released during crystallization and the temperature of the solution will increase. This is because the process of forming the crystal lattice requires the breaking of hydrogen bonds and other intermolecular forces, which releases energy.
Explanation:
Answer:
exothermic
Explanation:
When you crystallize the solution, sodium acetate forms a new bond from the soluble aqueous state ( Na+ and C2H3O2- ) to the solid state (NaC2H3O2). Forming bonds in chemistry is generally an exothermic reaction.
Potassium Permanganate is used for purifying drinking water, because
A. it is a sterilising agent
B. it dissolves the impurities of water
C. it is a reducing agent
D. it is an oxidising agent
Answer:
D. it is an oxidizing agent
Explanation:
Balance the following equation. Do
H₂+NO → H₂O + N₂
✓
V
V2 + 2NO → 2H2O + N2 The equation is balanced by adding an additional coefficient (2) to the hydrogen (H2) and water (H2O) molecules on the product side.
What is balanced?Balanced is a term used to describe a state of equilibrium or harmony. It implies a situation where all elements are in proportion and none are out of place or dominant. This could describe a healthy diet that provides a balance of proteins, carbohydrates, and fats, or a successful family life where time is shared between work, play, and private activities. Balance is also a key factor in physical and mental health, when all aspects of life are in alignment it allows for a more fulfilling and enjoyable experience.
This ensures that the number of atoms of each element is equal on both sides of the equation. In other words, the number of atoms of hydrogen (H2) and water (H2O) molecules on the left side of the equation must be equal to the number of atoms of hydrogen (H2) and water (H2O) molecules on the right side of the equation.
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For the reaction H2(g) + Cl2(g) 2HCl(g), Kc = 1.22 1033 at a temperature of 301 K. What is Kp at this temperature? A) 1.22 1033 B) 3.01 1034 C) 4.93 1031 D) 7.43 1035 E) 2.00 1030
The reaction would have a Kp of 3.01 * 10^34. Option B
What is the Kp of the reaction?We know that the equilibrium constant of the reaction is the value that would be able to show us how much of the reactants that have been converted to products when the reaction has attained the point of equilibrium at a given temperature.
As such we would have that;
Kp= Kc (RT)^Δn
Kp = ?
Kc = 1.22 * 10^ 33
R = 0.082
T = 301 K
Then we have that;
Kp = 1.22 * 10^ 33(0.082 * 301)^ 1
Kp = 3.01 * 10^34
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Is 1g equal to 1 mol?
Determine the pHpH at the equivalence point for the titration of a 40.0 mLmL sample of 0.100 MHNO2MHNO2 by 0.200 MKOHMKOH . (The pKapKa of nitrous acid is 3.34.)
The equivalent point's pH is 3.60.
A numerical measure of how acidic or basic aqueous or other liquid solutions are is called pH, and The expression, which is widely used in chemistry, biology, and agronomy, translates the hydrogen ion concentration, which normally ranges between 1 and gram-equivalents per liter, into values between 0 and 14. Since pure water has a pH of 7, or gram-equivalents per liter of hydrogen ions, it is neutral (neither acidic nor alkaline). An alkaline or basic solution has a pH over 7, whereas one with a pH below 7 is described as acidic.
HNO2 = 0.100M
KOH= 0.200M
pKa = 3.34
using a formula
pH = pKa + log (salt/acid)
= 3.34 + log (0.200/0.100)
= 3.34 + log 2
= 3.34 + 0.30
= 3.60
The equivalent point's pH is 3.60.
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Organic compounds form the basis of?
Answer:
1. carbon
Explanation:
carbon atoms bound to one another and other atoms by covalent bonds and found in the cells of living organisms. Hydrogen, oxygen and nitrogen are typical elements which, in addition to carbon, make up organic compounds.
How many electrons are neutral in c14?
Neutral carbon-14 contains six electrons, six protons, eight neutrons.
- The smallest particle that may exist, an atom, is what creates the entire cosmos. It has a core nucleus that houses the neutral species known as neutrons and positively charged species known as protons.
The orbit of the nucleus is being circled by negatively charged species of electrons. The atomic number of an atom is determined by its protons, and the number of protons is always equal to the number of electrons.
The carbon-14 in this instance is an isotope of carbon-12 with a mass number of 14. Atomic number six carbon has a total of six protons and six electrons.
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Write the expression using a single exponent.
–4^7(4^7)
–4^4
–4^11....correct
4^11
–16^11
part 2 of it is
5^9/5^3=5a
a=_____ ........... 6
Part 3 is (6^2)^7
6^5
6^9
6^14...correct
6^49.
The mathematical expressions written using a single exponent are as follows:
4⁴(4⁷) = 4¹¹
5⁹/5³; a = 6
(6²)⁷ = 6¹⁴
What are exponents in a mathematical expression?A number or letter written above and to the right of a mathematical expression known as the base is termed an exponent. It denotes that the base is to be increased in strength.
Consider the following expression: xⁿ
In the given expression above, the base is x, while the exponent or power is n. For expressions having the same base, the exponents are added if the expressions are to multiplied, and subtracted when the expressions are to be divided.
The exponents are multiplied if the exponents are raised to a power.
Considering the given expressions:
4⁴(4⁷) = 4¹¹
5⁹/5³ = 5⁶
Hence, a = 6
(6²)⁷ = 6¹⁴
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1. An organ which receive the waste product carried by the blood.
4. It is a gas that the body needs.
6. It is a combination of hemoglobin and oxygen that enters the body.
7. The respiratory and digestive work as it absorbed
that being
distributed through the body.
10. The system responsible for digestion of food
Down:
2. The ability to maintain a relatively stable internal state that persist despite
changes in the world outside,
3. The respiratory and circulatory work together by exchanging of
5. The signal that circulatory system carries that control the speed of digestion.
8. The system responsible of exchange of gases
9. The system carries nutrients to the entire body cells.
1. Kidney receive the waste product carried by the blood.
2. Homeostasis is the ability to maintain a relatively stable internal state that persist despite changes in the world outside.
3. The respiratory system and circulatory system work together by exchanging of oxygen and carbon dioxide.
4. Oxygen is a gas that the body needs.
5. Chemical signals are carried out by circulatory system that control the speed of digestion.
6. Oxyhemoglobin is a combination of hemoglobin and oxygen that enters in the body.
7. The respiratory system and digestive system work as it absorbed oxygen that being distributed through the body.
8. The respiratory system is responsible for exchange of gases.
9. The circulatory system carries nutrients to the entire body cells.
10. The digestive system is responsible for food digestion.
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2.278 x 10^-4 mol of an unidentified gaseous substance effuses through a tiny hole in 95.70 s. Under identical conditions, 1.738 x 10 ^-4 mol of argon gas takes 81.60 s to effuse. What is the molar mass of the unidentified substance
The unnamed material has a molar mass of 32 grammes per mole, and it exhales 2.278 x 10-4 molecules of an unknown gas through a minute hole in 95.70 seconds.
It takes 81.60 s for 1.738 x 10 -4 mol of argon gas to effuse under the same circumstances. The definition of molar mass is the mass in grammes of a mole of a specific chemical. The term "mole" refers to any material or compound that includes the Na number of atoms, molecules, or ions, where Na is the Avogadros number and Na = 6.023 1023. A molecule's total atomic mass expressed in grammes per mole is known as its molar mass. to figure out a molecule's molar mass
R1/R2 equals (M2/M1)1/2 2.38*10-6/2.1299*10-6 = sqrt(40/M1).
40 M1/M1 = 1.25 M2/M2 = 32 gm/mole
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2H₂(g) + O2(g) → 2H₂O(g)
How many liters of H₂ are required to form 5 moles of H₂O at STP?
Answer:
The answer is 21.5 L
Explanation:
Write the entire chemical equation and label the reactants and products.
C3H8 + 5 O2 → 3 CO2 + 4 H2O
Answer:the equation is already balanced and the reactants are the C3H8+ 5 O2 and the products are 3CO2+ 4H2O
Explanation:
At 161 K, SiH4 boils but SiO2 remains as a solid. Using principles of interparticle forces, explain the difference in boiling points.
The boiling point of a substance is determined by the strength of the interparticle forces between molecules.
What is boiling point?Boiling point is the temperature at which a liquid changes state from liquid to gas, also known as its vaporization point. The boiling point of water at sea level is 100°C (212°F).
In the case of SiH4, the boiling point is higher than that of SiO2 due to the stronger nature of the intermolecular forces. This is because SiH4 is held together by stronger hydrogen bonds, resulting in more energy needed to break apart the molecules. On the other hand, SiO2 is held together by weaker dipole-dipole interactions and London dispersion forces, meaning it requires less energy to break apart the molecules and thus has a lower boiling point.
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calculate the mass of .00566 mol of germanium, show work.
write the reaction equation for the reversible chemical reaction that occurs when the indicator bromcresol
Reactions that are reversible have the ability to move both forward and backward. Reactants change into products in a reversible reaction, but products can also change back into reactants.
In actuality, the opposing reaction as well as the forward reaction will occur simultaneously. In some chemical reactions, the reaction's products might combine to form the reactants' original form. Reversible reactions are what they are referred to as. To illustrate them, use the formula: A + B C + D. Only in one direction can irreversible chemical reactions take place. Reactants can transform into products, while products cannot transform back into reactants. Chemical reactions that can be reversed can happen both ways. The products can change back into the reactants, and the reactants can change back into the products.
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Is this water or oil
Answer:
it is oil.
Explanation:
it is oil because if water was written that would be wried so I think it is oil.