# Mole Calculations Worksheet #1 by murplelake77

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```									                                    Mole Calculations Worksheet #1

Solve the following problems. Show all your work!!!

1) What is the mass of 1 mole of lithium hydroxide?

2) A saltshaker filled with 17 grams of Sodium chloride contains how many moles of Sodium chloride?

3) Which of the following has the greatest mass? 4.2 mol of carbon or 8.34*1024 atoms of CaCO3 or 12.6 g of
Al2(NO3)3

4) In 60 g of N2O there are how many molecules?

5) Find the atomic mass or formula mass for each of the following:
a) Mn
b) Se
c) BaBr2
d) NaOH

6) Find the number of moles of each of the following:
a. 25 g of Ar
b. 38.6 g of Mg
c. 76.5 g of SO3
d. 229 g of NaNO3

7) Find the number of atoms in each of the following:
a. 0.28 mole Ni
b. 1.84 mole S
c. 1.32 mole F2
d. 3.15 mole K3PO4

8) Find the volume of each of the following amounts of gas at STP:
a. 0.72 mole of O2
b. 3.4 moles N2

9) How many moles are in each of the following volumes of gas at STP?
a. 83.5 L CO2
b. 55.2 L He
c. 15.8 L NH3

10) Find the mass of each of the gas samples in question 9.

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