Mole Conversions

Atoms

100

How many grams in 6.02 x 10^23 atoms C?

12.01 g C

200

How many moles in 3.011 x 10 ^23 atoms Mg?

0.5000 mol Mg

300

How many grams in 10.5 x 10^23 atoms Mg?

41.8 g Mg

400

How many atoms in 0.250 mol S?

1.51 x 10^23 atoms S

500

How many atoms in 0.02550 g Pt?

7.872 x 10^19 atoms Pt

Moles

100

What is the mass (g) of 1.00 mol Li?

6.94 g Li

200

How many atoms in 6.755 mol Pb?

4.068 x 10^24 atoms Pb

300

How many moles in 0.00750 g Ag? (in scientific notation)

6.95 x 10^-5 mol Ag

400

How many moles in 2.25 x 10^25 atoms Zn?

37.4 mol Zn

500

How many moles in 150 g S?

4.7 mol S

Grams

100

How many moles in 2.65 g Fe?

0.0474 mol Fe

200

How many grams in 6.50 moles Cu

413 g Cu

300

How many moles are in 0.535 g Zn?

0.00818 mol Zn

400

How many grams in 4.50 x 10^12 atoms Cl?

2.65 x 10^-10 g Cl

500

How many grams in 8.42 x 10¹ atoms Br?

1.1x10^-20 g Br

Random 1

100

What is Avogadro's Number?

6.02 x 10^23

200

How many items are in a mole?

6.02 x 10^23 items

300

What is the molar mass of Ca(OH)₂?

74.1 g/mol

400

What is the molar mass of Al(NO₃)₃?

213 g/mol

500

A 55-kg woman has 7.5 × 10⁻³ mol of hemoglobin (molar mass = 64,456 g/mol) in her blood. How many hemoglobin molecules is this? What is this quantity in grams?

4.52 × 10²¹ molecules of hemoglobin

483.42 g of hemoglobin

Empirical Formula

100

A 68 gram compound made up of Sodium and Sulfur contains 32 grams of sodium. What is the percent composition of the compound? 

Sodium-47.1%

Sulfur-52.9%

200

Determine the empirical formulas for the compound with the following percent compositions: 

 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen

CH₂O

300

Dichloroethane, a compound that is often used for dry cleaning, contains carbon, hydrogen, and chlorine. It has a molar mass of 99 g/mol. Analysis of a sample shows that it contains 24.3% carbon and 4.1% hydrogen. What is its empirical formula?

CH₂Cl