Part A) What principle states that the volumes of gases that combine in a chemical reaction are in the ratio of small whole numbers? A) Avogadro’s theory B) Law of constant conditions C) Law of conservation of volume D)Law of conservation of mass E) Law of combining volume Part B) Which of the following is not in the same ratio as the coefficients in a balanced chemical equation? A) Volumes of gaseous reactants and products B) Moles of reactants and products C) Molecules of reactants and products D) Masses of reactants and products E) None of the above Part C) What happens to the pressure of a gas if the number of molecules increases twofold (volume and temperature remains constant) A) The pressure decreases twofold B) The pressure remains constant C) The pressure decreases fourfold D) The pressure increases fourfold E) The pressure increases twofold

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A:

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A: Mass of Zn = 2400 mg × 1g/1000 mg  = 2.40 g Moles of Zn = mass /molar mass   = 2.40 /65.38  = 0.0367…

Q: What are the three types of stoichiometry problems?

A: ANSWERE IS DISCUSSED BELOW :

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A: One mole of aluminium contains Avogadro’s number of atom. That is, 6.02*1023 atoms.

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A: We will calculate mass of ammonia

Q: Calculate the mass of oxygen gas required to

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A: Answer of the question is given below

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".