Mole Conversions Worksheet #1



Mole Conversions Review - KEY

Name: ________________________ Date: ______________________

1. Convert from moles to grams.

a. 10.0 mol Cr 520 g

c. 2.20 x 10–3 mol Sn 0.261 g

e. 2.40 mol N2 67.2 g

2. Convert from grams to moles.

a. 72.0 g Ar 1.80 mol

c. 187 g Al 6.93 mol

e. 7.21 x 10–2 g He 1.80 x 10-2

3. Find the number of moles in each of the number of atoms or molecules.

a. 1.20 x 1025 atoms of P 19.9 mol

c. 4.81 x 1014 molecules of NH3 7.99 x 10-10 mol

4. Find the number of atoms or molecules in each of the number of moles.

a. 1.24 mol Cl2 7.46 x 1023 molecules

c. 34.02 mol Ca(OH)2 2.048 x 1025 molecules

5. Convert the following.

a. Find the number of molecules in 60.0 g of N2O. 8.21 x 1023 molecules

e. Find the mass of one atom of nickel. 1 x 10-22 g

Mole Conversions Review

Name: ________________________ Date: ______________________

1. Convert from moles to grams.

a. 10.0 mol Cr __________________________________________________________

c. 2.20 x 10–3 mol Sn __________________________________________________________

e. 2.40 mol N2 __________________________________________________________

2. Convert from grams to moles.

a. 72.0 g Ar __________________________________________________________

c. 187 g Al __________________________________________________________

e. 7.21 x 10–2 g He __________________________________________________________

3. Find the number of moles in each of the number of atoms or molecules.

a. 1.20 x 1025 atoms of P __________________________________________________________

c. 4.81 x 1014 molecules of NH3 ____________________________________________________

4. Find the number of atoms or molecules in each of the number of moles.

a. 1.24 mol Cl2 __________________________________________________________

c. 34.02 mol Ca(OH)2 __________________________________________________________

5. Convert the following.

a. Find the number of molecules in 60.0 g of N2O. __________________________________________________________

e. Find the mass of one atom of nickel. __________________________________________________________

6. 100 % hydrogen peroxide H2O2 has a density of 1.45 g/cm³ (not the type found in your medicine cabinet!) How many molecules of this compound are present in 100 mL?

__________________________________________________________

__________________________________________________________

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