The mole

Mole/Mass

100

What is the mass of 14.5 moles of hydrogen peroxide (H₂O₂)?

493 g

200

Find the number of moles of argon in 452 g of argon.

11.31 moles

300

Find the mass in grams of 2.23 moles of Fluorine gas

84.74 g F₂

400

What is the mass of 5 moles of Fe₂O₃?

798.5 g

500

How many moles in 28 grams of CO₂?

0.64 moles

Mole/Particle

100

How many moles are 5.92x10⁷¹ gold atoms?

9.83 x 10⁴⁷

200

How many moles of magnesium are in 3.01 x 10²² atoms of magnesium?

0.05 moles

300

How many molecules are there in 0.655 moles C₆H₁₄?

3.94 x1023

400

How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

2.41 x 10²⁴ molecules

500

How many moles of H₂SO₄ do you have if you have 6.02 x 10²³ atoms of oxygen?

0.25 moles

2 Step

100

What is the mass in grams of 1.20 x 10²⁵ atoms of phosphorous?

6.17 g

200

Find the mass, in grams, of 1.00 x 10²³ molecules of N2.

4.65 g

300

How many grams does 5.60 x 10²² molecules of silicon dioxide weigh?

5.59 g

400

What is the volume of 1.2 grams of water vapor at standard temperature and pressure (STP)?

1.49 L

500

Calculate the number of atoms of sodium sulfate present in a 20.0 gram sample.

5.93 x 1023 atoms

Empirical/%

100

Calculate the percent composition by mass of the elements in sodium carbonate, Na₂CO₃.

Na: 43.4 %

C: 11.3%

O: 45.3 %

200

Calculate the percent composition by mass of Carbon in Mg(C₂H₃O₂)₂

33.7%

300

What is the percent composition of C₄H₆O

68.54% carbon

8.63% hydrogen

22.83% oxygen.

400

What is the percent composition of the deadly poison Strychnine (C₂₁H₂₂N₂O₂)

75.42% carbon

6.63% hydrogen

8.38% nitrogen

9.60% oxygen.

500

What is the percent composition of Magnesium Hydroxide?

Mg(OH)₂

Mg: 41.68%

O: 54.86%

H: 3.46%

Mole/Liters

100

If I had 2.3 moles of hydrogen gas, how many liters would I have?

51.52L

200

If I have a balloon with a volume of 14.52 L, how many moles are gas are in the balloon?

0.65 mol

300

If you have 1.34 mol of Br₂ gas, how many liters do you have?

30.02L

400

If you have 0.63L of CO₂ gas, how many molecules of CO₂ gas do you have?

1.69 x 10²² molecules

500

I have a hot air balloon that I need to inflate.  The balloon can hold 5.45 kL.  How many moles of hot air would I need to fill the balloon.

243.3 mol