3. Chemical Reactions

A chemical equation can be used to solve stoichiometry problems provided that it:

When 64.0 g of C_2H_2 (acetylene) are completely combusted in oxygen, how many moles of H_2O are produced?

What is the number of moles of oxygen atoms in 4.96 mol of H2O2?

How many grams of alum (KAl(SO4)2·12H2O) can be produced from 20.0 g of aluminum (Al) when the reaction proceeds with 100% yield?

In the combustion of carbon, how many grams of oxygen (O_2) are required to produce 37.15 g of carbon dioxide (CO_2)?C + O_2 → CO_2

In the reaction PCl3 + Cl2 → PCl5, what is the mole ratio of PCl3 to PCl5?

How many grams of calcium carbonate (CaCO_3) are required to completely react with 25.0 mL of 0.750 M hydrochloric acid (HCl)?

In stoichiometry, how do you determine the mole ratio between $N_2$ and $H_2$ in the balanced equation $N_2+3H_2\to 2N_{H_3}$?

Seawater contains approximately 600 mmol of NaCl per liter. How many grams of NaCl are present in 250 mL of seawater?

Given the reaction S + O_2 → SO_2, how many moles of sulfur (S) are required to produce 15.0 mol of sulfur dioxide (SO_2)?

A sample of acetic acid is composed of 2.05 g of carbon and 2.73 g of oxygen. Calculate the mass of carbon in another sample of acetic acid that is composed of 3.27 g of oxygen.

Given the reaction 2 H_2 + O_2 → 2 H_2O, what mass of O_2 (in grams) is required to produce 55.0 grams of H_2O?

How many oxygen atoms are present in 2.74 g of Al_2(SO_4)_3?

What is the first step in performing mass calculations for chemical reactions?

How many grams of sodium metal are needed to generate 4.00 L of hydrogen gas at STP from the reaction with water?