Gravimetric Stoichiometry Quiz

2 KClO₃ → 2KCl + 3 O₂

How many moles of oxygen are produced when 6.70 moles of KClO₃ decompose completely?

• 6.70 mol

• 20.1 mol

• 10.1 mol

• 4.47 mol

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂

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

• 2.62 x 10³ g

• 291 g

• 450 g

• 872 g

2Na + 2H₂O → 2NaOH+ H₂

How many grams of hydrogen are produced if 120 g of Na are available?

• 2.6 g

• 5.2 g

• 21 g

• 5.3 g

What is the mole ratio in the following reaction:

2CO + O₂ → 2CO₂

• 2:1:2

• 1:1:1

• 1:2:1

• Have no clue what a mole ratios is!!

In a chemical reaction, the mass of reactants ___.

• is less than the mass of products

• is greater than the mass of products

• has no relationship to the mass of products

• is equal to the mass of products

Tags

NGSS.HS-PS1-7

N₂ + 3H₂ → 2NH₃

How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6

• 2

• 3

• 1

2H₂ + O₂ → 2H₂O

How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles

• 8 moles

• 16 moles

• 2 moles

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)

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

• 1.73 x 10³ g of O₂

• 576 g of O₂

• 256 g of O₂

• 384 g of O₂

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe;

What is the Ratio of moles of MgO to moles Fe?

• 3mol Mg / 2 mol Fe

• 2 mol Mg/ 3 mol Fe

• 1 mol Fe/ 2 mol Fe

• 3 mol MgO / 2 mol Fe

What is the first thing you must do to solve a stoichiometry problem?

• Write a Balanced Equation
• Panic
• Write an Unbalanced Equation
• Ask for help

Tags

NGSS.HS-PS1-7