Unit 6C Stoichiometry QUIZ

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

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-7

Balance the equation __Cl₂ + __KBr → __Br₂ + __KCl How many grams of potassium chloride can be produced from 356 grams potassium bromide?

• 749 g

• 225 g

• 479 g

• 814 g

What is the maximum amount of product that can be produced when 6.00g HCl produces 12.5g MgCl₂ and 5.00g Mg to forms 15.3g MgCl₂.

Mg + 2HCl --> MgCl₂ + H₂

• 6.00 g

• 5.00 g

• 15.3 g

• 12.5 g

11.

LiOH + KCl → LiCl + KOH

b) In the experiment, I produced 6 grams of lithium chloride and I began this reaction with 20 grams of lithium hydroxide. What is my percent yield?

• 16.9%

• 30%

• 1.88%

• 12.3%

2 CO (g) + O₂(g) → 2 CO₂ (g)

In the formation of CO₂ from CO and oxygen, how many Liters of CO₂ are produced by the reaction of 8.00 mols of O₂ with an excess of carbon monoxide?

• 0.178 L

• 358 Liters

• 704 grams

• 0.360 grams

How many grams are in 8 moles of Carbon?

• 96.0 g

• 0.67 g

• 2.67 g

• 48 g

Balance the equation:

__NaClO₃ (s) → __NaCl (s) + __O₂ (g)

2.00 moles of NaClO₃ will produce how many grams of O₂?

• 56 g of O₂

• 96 g of O₂

• 64 g O₂

• 32 g O₂

When reacting Na with Cl₂, we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?

• 100%
• 104%
• 96%
• 1.04

Tags

NGSS.HS-PS1-7

The limiting reactant

• slows the reaction down
• is used up first
• is the reactant that is left over
• controls the speed of the reaction