Regents Chemistry-Stoichiometry

Given the following chemical equation:

4 Al + 3 O₂ → 2 Al₂O₃

How many moles of aluminum oxide will be produced if 12 moles of aluminum are consumed?

• 12

• 4

• 8

• 6

Tags

NGSS.HS-PS1-7

Given the following chemical equation:

CH₄ + 2 O₂ → 2 H₂O + CO₂

How many moles of oxygen must be consumed in order to produce 5 moles of carbon dioxide.

• 10

• 5

• 8

• 15

Tags

NGSS.HS-PS1-7

Given the following chemical equation: 4 Al  +  3 O₂  →  2 Al₂O₃. How many moles of aluminum oxide will be produced if 12 moles of oxygen are consumed?

• 8
• 12
• 4
• 6

Tags

NGSS.HS-PS1-7

Given the following chemical equation:

2 Al + 3 CuCl₂ → 3 Cu + 2 AlCl₃

How many moles of copper (II) chloride must be consumed in order to produce 12 moles of aluminum chloride?

• 14

• 6

• 12

• 18

Tags

NGSS.HS-PS1-7

In the reaction

2RbNO₃ → 2RbNO₂ + O₂

how many moles of O₂ are produced when 5.0 mol of RbNO₃ decompose?

• 1.0 mol

• 2.5 mol

• 3.0 mol

• 7.5 mol

Tags

NGSS.HS-PS1-7

Given the equation

N₂ + 3H₂ --> 2NH₃

what is the total number of moles of NH₃ produced when 10 moles of H₂ reacts completely with N₂?

• 6.7

• 2.0

• 3.0

• 15.0

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-7

Balance the following reaction and determine the mole ratio

CaC₂(s) + H₂O(l) ---> C₂H₂(g) + Ca(OH)₂(aq)

• 1:2 --> 2:2

• 1:2 --> 1:1

• 2:1 --> 1:1

• 2:1 --> 2:1

Tags

NGSS.HS-PS1-7

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

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