Please help with these two chemistry questions. Image attached.
Answers
Answer:
The answer to your question is below
Explanation:
Question 2.
Answer: The molar mass is found by taking 2 x the molar mass of K, plus 1 x the molar mass of sulfur, plus 4 x the molar mass of oxygen.
Question 3.
molar mass H₂O₂ = (1 x 2) + (16 x 2)
= 2 + 32
= 34.02 g
Use proportions to find the number of moles
34.02 g of H₂O₂ ----------------- 1 mol
4 g ------------------ x
x = (4 x 1)/34.02
x = 4/34.02
x = 0.1175 ≈ 0.118 moles
Answer: 0.118 moles
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Scientific explanations of natural phenomena are based on A. opinion polls of scientists. B. only the observations made by a single scientist. C. only the most recent empirical evidence. D. all the empirical evidence available.
Considering the law of conservation of mass, if 56 g samples of solid iron (Fe) reacts with 24 g of oxygen (O2), how many grams of Iron Oxide (FeO) are obtained?
Please help! Multiple choice question! Which of the following gradients allow oxygen to leave the blood and enter body tissues and carbon dioxide to leave body tissues and enter the blood? A. High concentration of oxygen in the blood; high concentration of carbon dioxide in the body tissues B. Low concentration of oxygen in the blood; high concentration of carbon dioxide in the body tissues C. High concentration of oxygen in the blood; low concentration of carbon dioxide in the body tissues D. Low concentration of oxygen in the blood; low concentration of carbon dioxide in the body tissues
Propane (C3H8) reacts with oxygen gas to produce carbon dioxide & water. How many grams of oxygen are needed to oxidize 12.5g of propane (C3H8)? a) 1.8b) 22.7c) 55.6d) 31.8e) 45.5
Answers
Answer:
True
Explanation:
Resource Conservation and Recovery Act (RCRA). 1976 of United States Environmental Protection Agency(EPA) empowers EPA to control the production, transportation, storage, treatment and disposal of hazardous waste. The RCRA act was amended in 1984 and 1986 to include Waste minimization along with appropriate disposal (not in the landfill site) and tackling of petroleum hazardous waste respectively along with other waste.
Answer:
true is the correct answer.
Explanation:
- The Resource Conservation and Recovery Act controls hazardous waste from its creation to its disposal is true.
- The Resource Conservation and Recovery Act is the nation's premier law directing the control of solid and hazardous waste.
- To control the increasing problems that the nation is facing from the municipal waste and the industrial waste Resource Conservation and Recovery Act was signed.
- Resource Conservation and Recovery Act goals are to eliminate the quantity of waste produced and to protect the human health and the atmosphere from the dangers posed with waste disposal
b. the substances that make up a solution
c. the pH of a solution
d. the boiling point of a compound
Answers
a. the elements that make up the compound
d. the boiling point of a compound
Answer: a. the elements that make up the compound
Explanation:
Chemical formulas are the symbolic representation of the elements contained in a compound along with their relative proportions.
For example: The chemical formula for water is which shows that it is formed by combination of hydrogen and oxygen in the ratio of 2: 1 respectively.
pH of the solution is determined by litmus paper, pH paper or pH meter.
Boiling point is the temperature at which atmospheric pressure becomes equal to the atmospheric pressure.
Answers
Answer:
Molecules in food contain chemical energy that cells use to produce Adenosine triphosphate ATP. Respiration is that the method by that cell get energy within the sort of ATP. Adenosine triphosphate captures energy obtained from the breakdown of food molecules and releases it to fuel alternative cellular processes. ATP, is that the primary carrier of energy in cells. Once energy is required by the cell, it's born-again from storage molecules into ATP.
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Hope this helps!! (If not sorry!)
All mixtures are made up of 2 or more elements or compounds.
All mixtures are made up of solutions
All mixtures are made up of compounds.
All mixtures are made up of elements.
Answers
All mixtures are made up of two or more elements or compounds.
What are compounds?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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Answer:
Answer the first ine made up of 2 or more.....
B. The average energy increases.
C. The average velocity of the particles increases by a factor of sqrt 2 .
D. The average energy remains constant but the velocity of some particles increases
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Final answer:
When the temperature of a gas rises, the average energy of the particles increases. According to the Kinetic Molecular Theory, kinetic energy is proportional to its temperature. However, a rise in temperature doesn't directly double the energy.
Explanation:
The behavior of particles in a gas is very much affected by temperature changes. When the temperature of a gas increases, so too does the energy that the gas's particles have. This is defined by the Kinetic Molecular Theory, which states that the kinetic energy of a gas is proportional to its temperature. Therefore, when the temperature of a gas rises from 23°C to 46°C, the average energy of the particles increases. However, it doesn't double as an increase in temperature is not responsible for directly doubling the energy. Additionally, this increase in energy results in an increase in the velocity of the particles, but not necessarily by a factor of sqrt(2).
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