Molar Ratio Practice

N₂ +  3H₂ → 2NH₃ 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6

• 2

• 3

• 1

Tags

NGSS.MS-PS1-5

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

Tags

NGSS.HS-PS1-7

SiO₂ + 3C → SiC + 2CO

Using the balanced equation how many moles of Carbon monoxide would be produced from 6 moles of carbon?

• 112.0 mol CO

• 4.0 mol CO

• 28.0 mol CO

• 48.0 mol CO

Tags

NGSS.HS-PS1-7

How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol

• 1.0 mol

• 10.1 mol

• 4.5 mol

Tags

NGSS.HS-PS1-7

How many moles are in 16.94 g of water?

• 16.94 mol H₂O

• 0.9401 mol H₂O

• 305.3 mol H₂O

• 1.063 mol H₂O

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

What is the mole ratio between N₂ and NH₃ in the above reaction?

• 1 moles NH₃ / 2 moles N₂

• 2 moles NH₃ / 1 moles N₂

• 2 moles N₂ / 3 moles NH₃

• 1 moles N₂ / 3 moles NH₃

Tags

NGSS.HS-PS1-7

N₂ +  3H₂ −->  2NH₃ 
How many moles of ammonia are produced when 3 moles of nitrogen react with hydrogen?

• 6 moles ammonia

• 1.5 moles ammonia

• 9 moles ammonia

• 9 moles hydrogen

Tags

NGSS.HS-PS1-7

Gas grills use propane fuel. The combustion of propane is represented in this equation: C₃H₈ + 5O_{2 ---->} 3CO₂ + 4H₂O. How many grams of propane will burn when 36.0 moles of water are formed?

• 0.500 g C₃H₈

• 9.00 g C₃H₈

• 318 g C₃H₈

• 397 g C₃H₈

Tags

NGSS.HS-PS1-7

4NH₃ + 5O₂ --> 4NO + 6H₂O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen? 

• 0.37g

• 0.045g

• 1.35g

• 11.1g

Tags

NGSS.HS-PS1-7