Y10T2W6 Mid-Term 2 Revision- Stoichiometry

Y10T2W6 Mid-Term 2 Revision- Stoichiometry

Open Ended

Open Ended

Open Ended

Open Ended

Open Ended

Open Ended

Multiple Choice

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation? P₄O₁₀ + 6 H₂O --> 4 H₃PO₄

• 6:4

• 4:6

• 1:3

• 3:1

Multiple Choice

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.15%

• 1.04%

Multiple Choice

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

• theoretical yield

• mole ratio

• actual yield

• percentage yield

Multiple Choice

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂

How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

• 0.85 g

• 290 g

• 450 g

• 870 g

Multiple Choice

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.15%

• 1.04%

Multiple Choice

Calculate the number of NH₃ molecules in 2.5 moles.

• 6.02 x 10²³

• 4.15 x 10²²

• 1.51 x 10²⁴

• 1.51 x 10²³

Multiple Choice

CH₄ + 2 O₂ → CO₂ + 2 H₂O

How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

• 13.7 mol

• 2.75 mol

• 6.11 mol

• 6.88 mol

Multiple Choice

 SiO₂ + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?

• _{96 g}
• 0.67 g
• 2.67 g
• 48 g

Multiple Choice

2H₂ + O₂ → 2H₂O

How many moles of oxygen are consumed if 8 moles H₂ are used?

• 2

• 4

• 6

• 8

Multiple Choice

Calculate the number of NH₃ molecules in 2.5 moles.

• 6.02 x 10²³

• 4.15 x 10²²

• 1.51 x 10²⁴

• 1.51 x 10²³