Introduction to Stoichiometry

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Consider the reaction below. 2Al2O3 mc019-1.jpg 4Al + 3O2 How many moles of oxygen are produced if 11.0 mol of Al are produced?

8.25 mol

The balanced equation below shows the products that are formed when pentane (C5H12) is combusted. C5H12 + 8O2 mc029-1.jpg 10CO2 + 6H2O What is the mole ratio of oxygen to pentane?

8:1

The following balanced equation shows the formation of ammonia. N2 + 3H2 mc021-1.jpg 2NH3 How many moles of nitrogen are needed to completely convert 6.34 mol of hydrogen?

2.11 mol

The following balanced equation shows the formation of sulfur dioxide. S + O2 mc023-1.jpg SO2 How many moles of sulfur are needed to produce 15.0 mol of sulfur dioxide?

15.0 mol

Consider the balanced equation below. mc003-1.jpg What is the mole ratio of PCl3 to PCl5?

1:1

Acid rain can be destructive to both the natural environment and human-made structures. The equation below shows a reaction that occurs that may lead to the formation of acid rain. 3NO2 + H2O mc025-1.jpg 2HNO3 + NO How many moles (precise to the nearest 0.01 mol) of nitric acid are produced from 300.00 mol of nitrogen dioxide?

200.00

Consider the reaction below. 2H2 + O2 mc015-1.jpg 2H2O How many moles of water are produced from 13.35 mol of oxygen?

26.70

Consider the reaction below. 2C6H14 + 19O2 mc032-1.jpg 12CO2 + 14H2O How many moles of hexane (C6H14) must burn to form 18.4 mol of carbon dioxide?

3.07 mol

The equation below shows hydrogen reacting with oxygen to produce water. 2H2 + O2 mc028-1.jpg 2H2O If 16 mol of oxygen were reacted with excess hydrogen gas, how many moles of water would be produced?

32 mol

Consider the reaction below. 2Al2O3 mc031-1.jpg 4Al + 3O2 How many moles of oxygen are produced when 26.5 mol of aluminum oxide are decomposed?

39.8 mol

1 3 8 The equation below shows lithium reacting with nitrogen to produce lithium nitride. 6Li + N2 mc007-1.jpg 2Li3N If 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced?

4.0 mol

Consider the balanced equation below. 4NH3 + 3O2 mc004-1.jpg 2N2 + 6H2O What is the mole ratio of NH3 to N2?

4:2

Consider the balanced equation below. 2H2S + 3O2 mc008-1.jpg 2SO2 + 2H2O Which option gives the correct mole ratios?

H2S:SO2 = 2:2 and O2:H2O = 3:2

The balanced chemical equation for the reaction of hydrogen and oxygen is shown below. 2H2 + O2 mc002-1.jpg 2H2O The number of moles of hydrogen that is needed to produce 0.253 mol of water is

equal to 0.253 mol


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