8.1 Quiz

Balance the following reaction:

​ ​ (a)   Cl₂ + ​ (b)   Na₃N --> ​ (c)   NaCl + ​ (d)   N₂

• 3
• 2
• 6
• 1
• 4
• 5

Balance the following reaction:

​ (a)   NaOH + ​ (b)   CaCl₂ --> ​ (c)   NaCl + ​ (d)   Ca(OH)₂

• 4
• 5
• 2
• 1
• 3

If you are going to solve a molar ratio problem, how do you set it up?

a

b

c

d

Moles B

Calculated Moles B

Given Moles A

Moles A

What do you use as the numbers in the conversion factor for your molar ratio calculations?

• Molar Masses

• Atomic Numbers

• Avogadro's Number

• Coefficients from the balanced reaction

Use the balanced reaction to answer the question: How many moles of NaCl are produced if 2.5 moles of Cl₂ are used?

2Na + Cl₂ -->2NaCl

• 2.5

• 2

• 5

• 1.25

Use the balanced reaction to answer the question: How many moles of NH₃ are used if 15 moles of H₂ are produced?

2NH₃ --> N₂ + 3H₂

• 22.5

• 10

• 45

• 7.5

Use the balanced reaction to answer the question: How many moles of Na₃N are used if 1.25 moles of NaCl are produced?

3Cl₂ + 2Na₃N --> 6NaCl + N₂

• 1.25

• 2.5

• 0.42

• 0.5

The equation below is UNBALANCED. Balance it and solve the question: How many moles of N₂ are produced if 33 moles of Ca are produced?

Ca₃N₂ --> Ca + N₂

• 33

• 11

• 99

• 22

The equation below is UNBALANCED. Balance it and solve the question: How many moles of HCl are used if 5.2 moles of CaCl₂ are produced?

HCl + Ca --> H₂ + CaCl₂

• 2.6

• 5.2

• 10.4

• 7.1

In any conversion factor for a molar ratio, the coefficients are always 1.

• True

• False