Stoichiometry Test

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

• 6.85 mol

• none are correct

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

• 6

• 2

• 3

• 1

• none are correct

Tags

NGSS.HS-PS1-7

KNO₃ --> KNO₂ + O₂

What coefficients are needed to balance the reaction?

• 2, 2, 1

• 2, 3, 2

• 1, 2, 2

• 1, 3, 1

• none are correct

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

• 4:1

• 4:6

• 1:4

• 6:4

• none are correct

Balance this equation _Al +_HCl --> _H₂ +_AlCl₃

• 2, 6, 3, 2

• it is already balanced

• 4, 12, 3, 4

• 2, 1, 4, 5

• none are correct

Tags

NGSS.HS-PS1-7

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂

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

(round ans to correct sig figs, no labels)

(a)  

How many liters of NH₃ are needed to react completely with 30.0L of NO? 4NH₃+6NO --> 5N₂ + 6H₂O

• 5.0 L

• 20.0 L

• 7.5 L

• 120.0 L

• none are correct

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

• none are correct

Tags

NGSS.HS-PS1-7

A student burns 1.50 mol C₃H₈ according to the following reaction:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

How many grams of carbon dioxide are produced?

• 44.0 g

• 66.1 g

• 132 g

• 198 g

• none are correct

Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?

• 13 g

• 8.8 g

• 0.99 g

• 1.0 g

• none are correct