As the pressure on an increases, the volume of a gas declines because the gas atoms are forced closer together.
How do you find pressure?Let's first go through PV = nRT, the ideal gas law. P stands for pressure in atmospheres, V for volume in liters, n for moles of particles, T for temperature in Kelvin, and R for the ideal gas constant in this equation (0.0821 liter atmospheres per moles Kelvin).
How does pressure change during a reaction?What impact does pressure have on the reaction's speed? Pressure raises the concentration of the gases, which raises the pace of reaction. The reaction rate falls in the opposite direction and rises in the direction of less gaseous molecules.
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a compound containing 5.9265% hydrogen and 94.0735% oxygen has a molar mas of 34.01468g/mol. determine the emperical and molecular formula of this compound
A substance with a molar mass of 34.01468g/mol and an empirical formula of Hydrogen and oxygen and a molecular formula of twice has a composition of 5.9265% hydrogen and 94.0735% oxygen.
Thus Molecules are described by the empirical formula, where n = 1, 2, and 3. You can use the empirical formula to ascertain the molecular formula if you are aware of the molar mass of the chemical. Calculate the empirical formula mass first, and then divide the compound molar mass by it to get the empirical formula mass. Compounds are chemical entities comprised of a large number of comparable molecules.
Empirical equation equals Molecular formula
Hydrogen = 5.9265/atm weight: 5.9265/5.8795 = 1 (approximately)
Oxygen = 94.0735/16: 5.8795/5.8795 = 1
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melting of candle wax
Answer:
I don't understand what you mean
Answer:
Physical Change
Explanation:
Melting of Wax Is a Physical Change but Burning of Wax Is a Chemical Change: Melting of wax, by itself, involves a change of state from solid to liquid.
Which of the following best describes the change that takes place immediately after the CH₂OH(1) is introduced into the previously evacuated vessel? (A) A chemical change takes place because covalent bonds are broken. (B) A chemical change takes place because intermolecular attractions are overcome. (C) A physical change takes place because covalent bonds are broken. (D) A physical change takes place because intermolecular attractions are overcome.
When CH2OH is introduced into the previously evacuated vessel , A physical change takes place because intermolecular attractions are overcome. The correct option to this question is D.
Remove (or evacuate) the air between two glass tubes to form a vacuum and reduce heat loss through conduction and convection.
Methanol is known to contain extremely polar oxygens, so it can exhibit hydrogen bonding. It is known that methanol can form very strong hydrogen bonds. Hydrogen bonds are known to form when the positive charge of hydrogen atoms accumulates significantly.
Hydrogen bonding is a unique type of inter-dipole attraction between molecules rather than covalent bonding to hydrogen atoms. This results from the attraction between a hydrogen atom bonded to an extremely electronegative atom such as an O, N, or F atom and an additional extremely electronegative atom.
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plese hurrrrrrrrrrry
Use the terrestrial ecosystem food web to answer this question.
Terrestrial Ecosystem Food Web
Leopards eat baboons and impalas in a terrestrial ecosystem. What prediction can be made if the baboon population begins to decrease because of disease?
Question 5 options:
The leopard population will increase.
The scorpion population will decrease.
The impala population will decrease.
The hawk population will increase.
Answer:
The impala population will decrease.
Explanation:
We learn that leopards eat both baboons and impalas. If one of these two species is reduced in abundance, the leopards will increase consumption of the alternative, in this case impalas. An analogy: If you eat only chicken and beef, and the local store ran out of chicken, you'd choose beef, as everyone else in the same predicament. The leopards see fewer baboons because of the disease, so they'll start hunting more impalas, and the impala population will decrease.
lysine is a compound composed of carbon, hyrgoen, nitgrogen, and oxygen. when 1.50 g of lysine i burned, 2.72 g of carbon dioxide, 1.29 g of water, and 0.287 g of nitrogen gas are produced. what is the empirical formula of lysine? if the molar mass of lysine is 146.19 g/mol. what is the molecular formula?
The empirical formula of lysine is C₆H₁₄N₂.
By calculating the smallest whole number ratio from the mass percentages of a compound's constituent parts, it is possible to calculate its empirical formula.
We must first establish how many moles of each element are included in 1.50 g of lysine in order to determine the empirical formula for lysine. The mole ratios of the elements may then be calculated using these values and will match the ratio of the subscripts in the empirical formula.
We may determine how many moles of carbon and hydrogen are contained in 1.50 g of lysine by computing the mass of generated CO₂ and H₂O.
Moles of C = 2.72 g CO₂ x (1 mol CO₂ / 44.01 g CO₂) = 0.062 moles
Moles of H = 1.29 g H₂O x (2 moles H / 18.02 g H₂O) = 0.143 moles
Secondly, by being aware that lysine also generated 0.287 g of N. We can determine how many moles of N there are.
moles of N = 0.287 g N x (1 mole N / 28.02 g N) = 0.0102 moles
By dividing each element by the minimum number of moles, which is 0.0102 moles, we can now determine the ratio of the elements.
C = 0.062 moles / 0.0102 moles = 6
H = 0.12 moles / 0.0102 moles = 14
N = 0.0102 moles / 0.0102 moles = 1
Therefore, the empirical formula of lysine is C₆H₁₄N₂
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iron metal reacts with aqueous silver nitrate to produce aqueous iron(iii) nitrate and silver metal. what type of reaction is represented?
When Iron metal reacts with aqueous silver nitrate to produce aqueous iron(iii) nitrate and silver metal this will be represented as Single replacement reaction. In this the molecules of the chemical get replaced by other molecule.
This can be properly defined as, when One element in a molecule is replaced by another in a chemical reaction known as a single-displacement reaction, sometimes referred to as a single replacement reaction or exchange reaction.
It may be generalized as follows:
A + BC ⟶ AC + B.
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How much CH4 remains after 10.0 g of CH4 reacts completely with 15.0 g of O2 according to the following equation? CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g) (A) 0.00 g (B) 2.50 g (C) 5.00 g (D) 6.25 g 8 Part 2 (0.5 point) Feedback O See Hint Write a balanced nuclear equation to represent the image above that depicts nuclear fission. Assume the nuclelshown represent 2330 splitting into ? Kr and 141Ba. 8 141 92
(A) 0.00 g of CH4 remains after the reaction.
To determine how much CH4 remains after the reaction, we need to use the balanced chemical equation and the concept of stoichiometry.
The balanced chemical equation for the reaction is:
CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)
From the balanced equation, we know that 1 molecule of CH4 reacts with 2 molecules of O2.
We are given that 10.0 g of CH4 and 15.0 g of O2 react. We can use this information to determine the number of moles of CH4 and O2 that react.
1 mole of CH4 weighs 16.04 g and 1 mole of O2 weighs 32.00 g.
10.0 g of CH4 is equal to:
10.0 g / 16.04 g/mol = 0.623 mol CH4
15.0 g of O2 is equal to:
15.0 g / 32.00 g/mol = 0.46875 mol O2
Since the reaction is 2:1 ratio of O2: CH4, so 0.46875 mol O2 is enough for 0.234375 mol of CH4
So, no CH4 remains after the reaction.
Therefore, the answer is (A) 0.00 g of CH4 remains after the reaction.
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In regard to the E2 mechanism, rank the leaving groups in order of increasing reaction rate. R-Cl, R-I, R-F, R-Br
B)what's iupac name of the following compund?
The type of the halide's leaving property determines how quickly an alkyl halide will undergo an E2 reaction. A set of systematic guidelines for using with organic molecules are the IUPAC nomenclature.
The E2 mechanism is what.In one method, the bromine in an SN2 reaction is replaced with a methanethiolate nucleophile. In the alternative (bottom) pathway, the methoxide ion participates inside an elimination reaction as a base instead of a nucleophile.
How does the rate for E2 reactions change when people leave groups?Consequently, the quicker the E2 reaction, the better this leaving group is in E2 interactions as well. Below is a list of the most typical leaving group in nucleophilic replacement and removal reactions: As we previously established, the quicker the E2 elimination, the stronger the base.
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complete the lewis dot (electron-dot) structure for the given neutral atoms.
A Lewis dot structure, also known as an electron dot structure, is a way of representing the valence electrons of an atom in a chemical compound.
It uses dots (also called "electron dots" or "Lewis dots") to represent the valence electrons of an atom. The number of dots around an atom is equivalent to the number of valence electrons in the neutral atom.The Lewis dot structure is written by placing the chemical symbol of the atom at the center and placing dots around it to represent its valence electrons. For example, the Lewis dot structure of carbon (C) would be represented as:C.with four dots around it, representing the four valence electrons of carbon. In a Lewis dot structure, the valence electrons are represented by dots, which are placed around the chemical symbol of the element.
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The reaction of acetic acid and sodium bicarbonate involves a double replacement that is immediately followed by the
decomposition of an acid. Using your previous work, write the following chemical equations. Include states of matter (s
for solids, aq for aqueous, l for liquids, etc).
a. Double Replacement: _________________________________________________________________
b. Decomposition: ______________________________________________________________________
c.Overall:______________________________________________________________________________
Answer:
Explanation:
a. Double Replacement: CH3COOH(aq) + NaHCO3(aq) --> CH3COONa(aq) + H2O(l) + CO2(g)
b. Decomposition: H2CO3(aq) --> H2O(l) + CO2(g)
c.Overall: CH3COOH(aq) + NaHCO3(aq) --> CH3COONa(aq) + H2O(l) + CO2(g) + CO2(g)
in the treatment with radioactive phosphorus, 35p was found in the pellet of cellular debris at the bottom of the test tube. and in the treatment with radioactive sulfur, 32s was found only in the supernatand and not the debris pellet. how would you interpret this?
The phosphorus had a higher affinity for the cells than the sulfur.
What is phosphorus?Phosphorus is a chemical element that has the symbol P and atomic number 15. It is a nonmetallic, multivalent, and highly reactive element that is an essential component of life. Phosphorus is found in many fertilizers and is an important component of DNA and RNA. In plants, phosphorus helps with energy production, root growth, and seed production. In animals, phosphorus helps with growth and development, muscle contraction and nerve impulse transmission, and cellular communication.
This suggests that the radioactive phosphorus was taken up by the cells and incorporated into their structure, while the radioactive sulfur was not able to be taken up by the cells and remained in the supernatant. Therefore, the phosphorus had a higher affinity for the cells than the sulfur.
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I actually can't figure this out, can someone help me?
You and your friends are at the lake on a particularly sunny day. Use specific heat capacity to explain why the sand on the shores of the lake feels so much hotter than the water in the lake even though the same solar energy is being absorbed by both materials.
Answer:
sand's specific heat capacity is low that water(i.e. 830J/kg°C) Due to it's low specific heat capacity it gets hotter easily. That's whythe sand on the shores of the lake feels so much hotter than the water in the lake even though the same solar energy is being absorbed by both materials.
what makes phospholipids apmhipathic/amphiphilic? the presence of hydrocarbon chains only the presence of phosphate group only the absence of double bonds in the hydrocarbon chain the presence of double bonds in the hydrocarbon chain the presence of both, hydrocarbon chains and phosphate group
Because of their hydrophobic tails & hydrophilic head, phospholipids constitute amphipathic molecules.
Describe the hydrophilic head.A phosphate and a choline molecule (blue) make up the hydrophilic head (orange). This head is joined to a triglyceride (green) that has two fatty acid tails that are hydrophobic (purple). (D) This image reveals the precise atoms that make up each of the phosphatidyl molecule's subdomains.
How come the hydrophilic head is polar?A individual phospholipid molecule comprises two parallel chains of oleic acids that create the lipid "tails" and a phosphate group, which is referred to as the "head," on the other end. The phosphate group's negative charge group makes the head neutral and hydrodynamic, or "water loving," in nature. As a result, the acid heads are drawn to the water.
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Consider the pair of reactions. Draw the organic products, then predict the type of substitution mechanism and compare the expected rates.
The pair of reaction will be solvolysis. Both reaction will occur by SN1 mechanism.
Solvolysis is a chemical reaction in which the solvent, such as water or the alcohol, is one of the reagents and it is present in great excess of that required for the reaction.
For the two reactions, the organic product is the same. Both the reactions will occur by SN1 mechanism since the substrate is a tertiary alkyl halide and the nucleophile is CH3OH as well as the rate of reaction depends on the concentration of the alkyl halide and the independent of the concentration of methanol present.
Therefore, change the volume of the solvent has no effect on the rate of reaction. The two reactions will proceed exactly the same rate since the initial concentration of the alkyl halide is the same for both the reactions.
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SO2 melts at 201 K, whereas SiO2 melts at 1,883 K. Account for the difference in melting points. You must discuss both of the substances in your answer.
SO2 is a compound made up of sulfur and oxygen atoms, while SiO2 is a compound made up of silicon and oxygen atoms. The difference in their melting points can be attributed to their chemical structures and the types of chemical bonds that hold the atoms together.
In SO2, the sulfur atom is bonded to two oxygen atoms through covalent bonds. Covalent bonds are formed when atoms share electrons, and they tend to be relatively weak. As a result, the bonds in SO2 are not very strong and do not require a lot of energy to break. This means that SO2 has a relatively low melting point of 201 K.
In contrast, SiO2 is a network-solid, and the Si-O bond is covalent in nature and relatively strong. The network structure of SiO2 means that the atoms are tightly bound to one another in a repeating pattern. To melt SiO2, a large amount of energy is needed to break the strong covalent bonds between the atoms. This results in a high melting point of 1,883 K.
In summary, the difference in melting points of SO2 and SiO2 is due to the different types of chemical bonds and structures present in each compound. SO2 is held together by weaker covalent bonds, while SiO2 is held together by stronger covalent bonds in a network structure.
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The difference in melting points between SO2 and SiO2 can be attributed to their different chemical structures and bonding types.
SO2 is composed of sulfur and oxygen atoms, which form a polar covalent bond. This means that the electrons are shared equally between the atoms, but the electrons are attracted more strongly to one atom than the other, creating a partial positive and partial negative charge.
The polar nature of the SO2 molecule creates relatively weak intermolecular forces, such as dipole-dipole interactions, which results in a relatively low melting point.
SiO2, on the other hand, is composed of silicon and oxygen atoms, which form covalent bonds. The covalent bond in SiO2 is much stronger than the polar covalent bond in SO2, as the electrons are shared equally between the atoms and there is no partial positive or negative charge. As a result, the intermolecular forces in SiO2 are much stronger, such as covalent bonds, which results in a much higher melting point.
Additionally, SiO2 is a network solid, meaning that the atoms are held together by a three-dimensional network of covalent bonds. This network structure makes SiO2 much more difficult to melt than SO2, as it requires a large amount of energy to overcome the covalent bonds holding the atoms together. This is another reason why SiO2 has a higher melting point than SO2.
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argon has a normal boiling point of 87.2 k and a melting point (at 1 atm) of 84.1 k. its critical temperature is 150.8 k, and its critical pressure is 48.3 atm. it has a triple point at 83.7 k and 0.68 atm. sketch the phase diagram for argon. which has the greater density, solid argon or liquid argon?
Solid argon is thick than liquid argon because the emulsion wind has a positive pitch, and the solid phase is stable at advanced pressure.
The critical temperature for a pure substance is the temperature above which the gas cannot come liquid, anyhow of the applied pressure.
For a pure substance, the critical pressure is defined as the pressure above which liquid and gas cannot attend at any temperature. The critical temperature for a pure substance is the temperature above which the gas cannot come liquid, anyhow of the applied pressure.
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How many grams of HNO3 are needed to make 700.0 mL of a 5.0 M solution?
220.035 grams of HNO3 are needed to make 700.0 mL of a 5.0 M solution.
To make 700.0 mL of a 5.0 M solution of HNO3, we need to calculate the number of moles of HNO3 required, then convert that to grams. We can use the formula: Molarity = moles of solute / liters of solution.We know that the molarity is 5.0 M and the volume is 700.0 mL.
To convert mL to L, we divide by 1000. So: 5.0 M = moles of HNO3 / (700.0 mL / 1000)Solving for moles of HNO3: moles of HNO3 = (5.0 M) x (700.0 mL / 1000) = 3.5 moles of HNO3. Then we can use the molar mass of HNO3 to convert moles to grams.
HNO3 molar mass is 63.01 g/mol. So, the number of grams of HNO3 required is: 3.5 moles x 63.01 g/mol = 220.035 g. Therefore, 220.035 grams of HNO3 are needed to make 700.0 mL of a 5.0 M solution.
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The concept molarity is an important method which is used to calculate the concentration of a solution. It is mainly employed to calculate the concentration of a binary solution. Here the grams of HNO₃ is 220.53 g.
What is molarity?The term molarity is defined as the number of moles of the solute present per litre of the solution. It is represented by using the letter 'M' and its unit is mol/L. The term molarity is also known as the molar concentration.
Molarity = Number of moles of the solute / Volume of the solution in litres
700.0 mL = 0.7 L
Number of moles = Molarity × Volume of the solution
5.0 × 0.7 = 3.5
Number of moles = Mass / Molar mass
3.5 = m / 63.01
m = 220.53 g
Thus the mass in grams of HNO₃ is 220.53 g.
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When heating a solution to boiling on a hot plate, start by ____________ a. preheating the glassware in the oven b. starting and stabilizing the stir function c. manually stirring the solution
Starting and stabilizing the stir function.
What functions may funnels do in the laboratory?Pouring solids into a beaker or other container. To pour liquid, other types of funnels can be utilized. Pouring liquid into a beaker. A powder funnel is a funnel with a broad opening that is used for solids.
Start by beginning and stabilizing the stir function when heating a solution to boiling on a hot plate. To begin, reduce the heat to a medium setting. After approximately ten minutes of not witnessing boiling, increase the heat setting if required. When a certain amount of solute is dissolved in a solvent at constant pressure, the net result of energy absorbed or released as heat by the solution.
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a solution contains 161 mg of na ions per liter. how many miliosmoles are represented in the solution
The total number of millimoles present in the solution containing 161 mg of Na ions are 7.04 millimoles/L.
What are millimoles?A substance's concentration in a quantity equivalent to a thousandth of a mole (a measure of the amount of a substance). as well known as millimole.
You would need to multiply the number of moles of sodium ions (Na+) in the solution by the number of litres of solution in order to get the number of millimoles represented in the solution.
Divide the given milligrames (mg) by the molar mass of sodium ion to convert mg to moles (22.99).
Therefore, 161 mg/L is 161/22.99 = 7.04 10⁻³ moles/L.
You would now need to multiply 7.04 10⁻³ moles/L by 1000 to convert from moles/L to millimoles/L.
Thus, 7.04 10⁻³ moles/L multiplied by 1000 equals 7.04 millimoles/L.
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the ratio of the rate of diffusion of an unknown gas to oxygen is 0.85. what is the molar mass of the unknown gas
Molar mass of oxygen = 32 g/mo is the ratio of the rate of diffusion of an unknown gas to oxygen is 0.85.
What is oxygen explain?Oxygen is a chemical element with an atomic number of 8 (it has eight protons in its nucleus). Oxygen forms a chemical compound (O2) of two atoms which is a colorless gas at normal temperatures and pressures. Four representations chemists use for molecular oxygen.
Do you breathe in O2?We breathe in oxygen and some of this carbon dioxide. When we exhale, we breathe out less oxygen but more carbon dioxide than we inhale. The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat.
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How many moles of Mg are
present in 2.5 x 1025 atoms Mg?
A. 4.15 x 1047 moles
C. 41.5 moles
B. 1.51 x 1049 moles
D. 0.415 mole
One mole of Mg contains 6.022 × 10²³ number of Mg atoms. Hence, number of moles of Mg that contains 2.5 × 10²⁵ atoms is 41.5 moles.
What is one mole?Any substance that contains 6.022 × 10²³ number of atoms is called ne mole of that substance. This number is called Avogadro number. Hence, one mole of every elements contains Avogadro number of atoms.
Magnesium is 12th element in periodic table. It is an alkaline earth metal. The number of atoms in one mole of Mg is equal to Avogadro number. Mass of the element with one mole of amount is called its atomic mass.
Number of moles of Mg that contains 2.5 × 10²⁵ atoms :
= 2.5 × 10²⁵ atoms/6.022 × 10²³ = 41.5 moles.
Therefore, 41.5 moles of Mg contains 2.5 × 10²⁵ atoms.
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the metallic radius of a sodium atom is 186 pm. what is the volume of a sodium atom in cubic meters?
The volume of a sodium atom in cubic meters is 6.434×10[tex]^-6[/tex] cubic meters.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
As the atom is sphere , volume is (r)³=(186)³=6.434×10[tex]^-6[/tex] cubic meters.
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What must be the temperature (K) if the following reaction has ΔG°= -38.5 kJ, ΔH°= -14.6 kJ, and ΔS°= 0.152 kJ/ K?
Fe2O3 (s) + 3CO (g) → 2Fe (s) + 3CO2 (g)
The temperature (T) at which the given reaction has ΔG°=-38.5 kJ, ΔH°=-14.6 kJ, and ΔS°=0.152 kJ/K is 1273.7 K.
What is temperature?Temperature is a physical property of matter that measures the average kinetic energy of the particles in a system. It is measured by thermometers and expressed in units such as degrees Fahrenheit (°F) and degrees Celsius (°C). Temperature is a fundamental factor in determining the nature of the physical and chemical changes that occur in matter.
The temperature (T) that corresponds to the given ΔG°, ΔH°, and ΔS° values can be determined using the equation ΔG° = ΔH° - TΔS°.
Substituting the given values yields:
-38.5 kJ = -14.6 kJ - T(0.152 kJ/K)
Rearranging yields:
T = -38.5 kJ + 14.6 kJ / 0.152 kJ/K = 1273.7 K.
Therefore, the temperature (T) at which the given reaction has ΔG°=-38.5 kJ, ΔH°=-14.6 kJ, and ΔS°=0.152 kJ/K is 1273.7 K.
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if a chemical reaction produces 20.0 grams of product, but by stoichiometry it is supposed to have 25.0 grams of product; what is the percent yield of the reaction? group of answer choices
Although the theoretical yield is 25.0 grams, the actual yield is only 20.0 grams. utilizing the percent yield stoichiometry formula.
What does chemistry's stoichiometry mean?Chemical The quantitative analysis of the reactants and products involved in a chemical process is known as stoichiometry. Stoichiometry is a combination of the Greek words "stoikhein," which means element, and "metron," which means measure.
What are the four different kinds of stoichiometry issues?Stoichiometric challenges can be divided into four groups: conversion from mass to mass. Mole conversion from mass. Conversion from moles to mass stages.
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I don't know how to use that term in this explanation, can someone help me? I'd deeply appreciate it! :)
Explain how lenses in glasses or contacts need to change the light waves that enter the eye for a person who is
Nearsighted
Farsighted
Use the terms convex and concave in your answer.
Answer:
Glasses or contact lenses correct vision because they allow the eye to focus light in the right spot on the retina the spot that produces the clearest image. Because everyone's eyes are different, a pair of glasses that makes one person see wonderfully may look terribly blurry to someone else.
Nearsighted- unable to see things clearly unless they are relatively close to the eyes, owing to the focusing of rays of light by the eye at a point in front of the retina; myopic.
Farsighted- a common vision condition in which you can see distant objects clearly, but objects nearby may be blurry. The degree of your farsightedness influences your focusing ability.
Explanation:
I hope that makes sense
automobiles burn gasoline (c8h18) in order to provide the energy they need to move. when they do, carbon dioxide (co2) is released. what chemical equation is the most accurate model for the reaction?
The chemical equation which can be formulated as the most accurate model for the reaction of burning gasoline which is 2 C8H18(l) + 25 O2(g) → 16 CO2(g) + 18 H2O(g)
A car is designed in such a way where it utilizes fuel as its source of energy. This fuel actually contains all the chemicals where the engine of the car breaks down via combustion to facilitate the process of its functioning. Kinetic energy can be defined as the process of the form of mechanical energy produced as a result of motion. A moving object which individual etc uses kinetic energy to do so.
The fuel (gasoline) which is being supplied into the car's engine makes the car able to move from their place, therefore, we can say that the chemical energy present in the fuel is being converted to kinetic energy that is observable in the car on motion along with the release of heat by the engine.
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The decomposition of HI(g) H I ( g ) is represented by the equation 2HI(g)?H2(g)+I2(g) 2HI (g) ? H2 (g) + I2 (g) The following experiment was devised to determine the equilibrium constant of the reaction. HI(g) HI (g) is introduced into five identical 400-cm3 glass bulbs, and the five bulbs are maintained at 623 K .The amount of I2 produced over time is measured by opening each bulb and titrating the contents with 0.0150 M Na2S2O3(aq) Na2S2O3 ( a q ) . The reaction of I2 I 2 with the titrant is I2+2Na2S2O3?Na2S4O6+2NaIIn which bulb would you expect the composition of gases to be closest to equilibrium? bulb 1 bulb 2 bulb 3 bulb 4 bulb 5
The majority of a hydrocarbon mixture which makes up natural gas is composed of the two saturate light paraffins methane and ethane, which are gaseous in an atmosphere.
What is meant by equilibrium?During a reversible chemical process, chemical equilibrium is the state in which there is no net change in the quantity of reactants or products. As "balancing" is the definition of the word "equilibrium," it follows that what a chemical process represents an equilibrium between the products and reactants involved in the reaction. a situation in which opposing forces are acting in balance or at rest. equitable distribution of all forces, effects, etc.; equal impact. emotional or mental equilibrium; equanimity: She lost it under the burden of the circumstances.
What causes equilibrium in chemistry?Chemical equilibrium is the condition of a system in which the parameters of the system remain constant over time and neither the reactant concentration nor the product concentration changes. The system enters chemical equilibrium when the forward reaction rate and the reverse reaction rate are equal.
The percentages of nitrogen, oxygen, argon, and other gases, respectively, in the Earth's atmosphere are around 78%, 21%, 0.9 percent, and 0.1%. Other gases that make up the remaining 0.1 percent include minute amounts of neon, carbon dioxide, and methane. Substances called gases are those that can exist under one atmosphere of pressure. The 11 gases are oxygen, neon, krypton, radon, xenon, hydrogen, chlorine, and fluorine. These are referred to be pure gases since they are all elements.
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A 1.2 M solution of H2S reacts with a 0.80 M solution of NH2-. What volume of H2S is needed to neutralize 45mL of NH2-?
The volume of H2S needed to neutralize 45mL of NH2- is 0.053 L
What do you mean by neutralization reaction?A neutralization reaction, in which an acid and a base react to form water and salt.
The reaction between H2S and NH2- is a neutralization reaction. The balanced equation for the reaction is:
H2S(aq) + NH2-(aq) → NH4HS(aq)
We know that the concentration of H2S is 1.2 M and the concentration of NH2- is 0.80 M and we are trying to find the volume of H2S needed to neutralize 45mL of NH2-.
The number of moles of H2S can be calculated by using the formula:
moles = molarity x volume
The volume of H2S needed to neutralize 45mL of NH2- is equal to the number of moles of NH2- in 45mL, divided by the concentration of H2S.
moles of NH2- = 0.080 L * 0.80 mol/L = 0.064 mol
volume = moles of NH2- / molarity of H2S
volume = 0.064 mol / 1.2 mol/L = 0.053 L
Therefore, the volume of H2S needed to neutralize 45mL of NH2- is 0.053 L.
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to what reaction does the solubility product constant, ksp, refer? table 16.1 lists ksp values for several ionic solids. for any of these ionic compounds, you should be able to calculate the solubility. what is the solubility of a salt, and what procedures do you follow to calculate the solubility of a salt? how would you calculate the ksp value for a salt given the solubility
The solubility product constant (Ksp) is a measure of the equilibrium of a salt in an aqueous solution.
What is solubility?Solubility is the ability of a substance to dissolve in a given solvent. It is a measure of the maximum amount of a solute that can be dissolved in a solvent.
It is used to determine the solubility of an ionic solid in a given solution. Ksp is the product of the concentrations of the ions in the solution at the equilibrium state.
Table 16.1 lists Ksp values for several ionic solids. The solubility of a salt is the amount of the salt that can be dissolved in a given amount of water or other solvent. To calculate the solubility of a salt, one must first determine the Ksp value for that salt. Then, the amount of the salt that will dissolve in a given amount of solvent can be calculated from the Ksp value.
To calculate the Ksp value for a salt given the solubility, one must first calculate the concentrations of the ions in the solution. This can be done by dividing the solubility of the salt by the total volume of the solution. Once the concentrations of the ions in the solution are known, the Ksp value can be determined by taking the product of these concentrations.
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classify the following as physical or chemical changes. a. moth balls gradually vaporize in a closet. b. hydrofluoric acid attacks glass, and is used to etch calibration marks on glass laboratory utensils. c. a french chef making a sauce with brandy is able to burn off the alcohol from the brandy, leaving just the brandy flavoring. d. chemistry majors sometimes get holes in the cotton jeans they wear to lab because of acid spills.
a.) Physical change ; b.) chemical change. c.) Chemical change d.) chemical change.
What is physical and chemical change?In physical change, there is no change in the chemical composition of the substance and change is only on physical properties. In chemical change, there is the combination of two or more substances that combine to form a new one.
a.) Mothballs gradually vaporize in closet is the -- Physical change
b.) Hydrofluoric acid attacks glass and is used to etch calibrations marks on glass laboratory utensils is the -- chemical change.
c.) French chef making sauce with brandy is able to burn of the alcohol from the brandy leaving just the brandy flavoring is-- Chemical change
d.) Chemistry major sometimes get holes in the cotton jeans they wear to lab, because of the acid spills is the-- chemical change.
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