Worksheet 9.1

Hydrogen sulfide gas, which smells like rotten eggs, burns in air to produce sulfur dioxide and water. How many moles of oxygen gas would be needed to completely burn 8 moles of hydrogen sulfide?

___H₂S_(g) + ___ O_{2 (g)} → ___ SO2_(g) + ___ H₂O_(g)

Propane, C₃H₈, burns in air to form carbon dioxide and water. If 12 moles of carbon dioxide are formed, how many moles of propane were burned?

Ammonia, NH₃, for fertilizer is made by causing hydrogen and nitrogen to react at high temperature and pressure. How many moles of ammonia can be made from 0.15 moles of nitrogen gas?

The poison gas phosgene, COCl₂, reacts with water in the lungs to form hydrochloric acid HCl and carbon dioxide. How many moles of hydrochloric acid would be formed by 0.835 moles of phosgene?

Iron metal and oxygen combine to form the magnetic oxide of iron, Fe₃O₄. How many moles of iron can be converted to magnetite by 8.80 moles of pure oxygen?

The recipe for Coca-Cola Classic is a closely guarded secret. Researchers outside the company believe the flavoring mixture, known as “7X”, contains oils of orange, lemon, nutmeg, cinnamon, and coriander. The original mixture also contained caffeine, vanilla, caramel, lime juice, sugar or artificial sweetener, and citric acid.

Over the years, the recipe has changed. For example, the original recipe contained citric acid but this was combined with phosphoric acid to cut production costs. Corn syrup replaced sugar for the same reason.

C₈H₁₀N₄O₂ + 4 H₃PO₄ + 6 CO₂ + other ingredients → C₆H₅CO₂K + other products

caffeine phosphoric acid potassium benzoate

To produce 1000 cans of Coca-Cola Classic, 40g (0.21 moles) of caffeine are reacted with phosphoric acid and other ingredients. How many moles of phosphoric acid are required?

How many moles of carbon dioxide are required?