CHM 1045 Limiting

When octane (C₈H₁₈ ) is burned in air, it chemically reacts with oxygen gas  to produce carbon dioxide  and water. What mass of octane is consumed by the reaction of 8.7g of oxygen gas?

Round your answer to 2 significant digits.

Ammonium phosphate ((NH₄ )₃PO₄) is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid (H₃PO₄) with ammonia. What mass of ammonium phosphate is produced by the reaction of 4.52 g of phosphoric acid?

Round your answer to 3 significant digits.

Solid Al and O₂ gas react to form solid aluminum oxide. Suppose you have 2.0 mol of Al and 11.0 mol of O₂

If half the Al can react, how many moles of aluminum oxide would be produced after half Al was used up. Round to the nearest 0.1 mol.

• 0.5 mol

• Not possible for half Al to react

• 0.8 mol

• 0.7 mol

Nitrogen dioxide gas and liquid water react to form aqueous nitric acid and nitrogen monoxide gas. Suppose you have 1.0 mol of nitrogen dioxide and 11.0 mol water in a reactor. Suppose as much as possible of the nitrogen dioxide reacts. How much will be left? Round your answer to the nearest .

Aqueous hydrobromic acid (HBr) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water. Suppose 52.6 g of hydrobromic acid is mixed with 16. g of sodium hydroxide. Calculate the maximum mass of sodium bromide that could be produced by the chemical reaction. Round your answer to 2 significant digits

• 41. g

• 43. g

• 45. g

• 50.g

Liquid hexane (CH₃(CH₂)₄CH₃) reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water. If 2.56 g of water is produced from the reaction of 6.89 g of hexane and 12.6 g of oxygen gas, calculate the percent yield of water. Round your answer to 3 significant figures.