Moles + Conversions

How many eggs in 4 dozen eggs?

• 12

• 48

• 40

• 4

A mole of carbon =

• 6.02 x 10²³ carbon atoms

• 12.011 carbon atoms

• one big ol' diamond

6.02 x 10²³ atoms of carbon weighs _____

• 6.02 x 10²³ g/mol

• 12.011 g/mol

• 12.011(6.02 x 10²³) g/mol

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

• Write a Balanced Equation

• Panic

• Find molar mass

Balance the following reaction :  

CaC₂   +   H₂O  -->   C₂H₂  +   Ca(OH)₂

• 1,2,2,2

• 1,2,1,1

• 2,1,1,1

• 2,1,2,1

Tags

NGSS.HS-PS1-7

What is the mole ratio of magnesium oxide and iron?

3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe

• 3 mol Mg : 2 mol Fe

• 2 mol MgO : 3 mol Fe

• 1 mol Fe : 2 mol Fe

• 3 mol MgO : 2 mol Fe

Tags

NGSS.HS-PS1-7

What is the mole ratio of oxygen gas to water?

2 H₂ + O₂ → 2 H₂O

• 1:2

• 3:4

• 4:3

Tags

NGSS.HS-PS1-7

In the reaction 2 H₂ + O₂ → 2 H₂O what is the mole ratio of oxygen to water

• 1:2

• 2:1

• 3:4

• 4:3

Tags

NGSS.HS-PS1-7

How many moles of aluminum oxide can you produce if you have 2 moles of Al?

4 Al + 3 O₂ --> 2 Al₂O₃

• 3 mole

• 2 mole

• 1 mole

• 0.5 mole

Tags

NGSS.HS-PS1-7

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

N₂ +  3H₂ → 2NH₃ 

• 6
• 2
• 3
• 1