Stoichiometry Test Review

If the amount of a substance that you have is less than the amount you need, your reactant is ______.

• Excess

• Limiting

• Stoichiometry

• Available

In a reaction I theoretically expect to obtain 32.65 grams of product. After the experiment you actually end up with 28.95 grams of the product. What is your percent yield?

• 109%

• 91.3%

• 88.7%

• 81.7%

How many grams of oxygen would be required for the combustion of 35 grams of methane  (CH₄)?

• 139.65 grams

• 49.87 grams

• 399.0 grams

• 199.5 grams

The decomposition of nitrogen triiodide produced 548 grams of Iodine gas (excess nitrogen gas is the other product). How much nitrogen triiodide did you start with?

• 378.7 grams

• 851.3 grams

• 394.7 grams

• 284.2 grams

The SYNTHESIS of 300 grams of ammonia (NH₃), would require how much nitrogen gas? (requires hydrogen gas as other reactant)

• 89.6 grams

• 411.5 grams

• 1644.2 grams

• 246.7 grams

If I have 83 grams of Iron (III) chloride and 45 grams of copper metal, what would be my limiting reagent? (The product will have a copper (II) ion)

• Iron Metal

• Iron (III) chloride

• Copper metal

• Copper (II) chloride

Determine the amount of Aluminum hydroxide product produced if you mix 45 grams of Aluminum (III) chloride with 29 grams of Lithium hydroxide.

• 19.5 grams

• 214.9 grams

• 43.4 grams

• 21.6 grams

A solution is made by dissolving 0.425 mole of NaCl in enough water to give a final volume of 450.0 mL. What is the molarity of the solution?

• 0.10 M

• 0.80 M

• 0.94 M

• 2.5 M

What is the molarity of a solution containing 35.0 grams of NH3 in 1.50 liters of solution?

• 0.083 M

• 14.2 M

• 0.56 M

• 1.37 M

375 mL of a 0.40 M HBr solution requires what volume of concentrated 4M HBr?

• 3.75 mL

• 1.85 mL

• 5.55 mL

• 1.875 mL