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Date:

Class:

Calculations Practice

Show work for all of the following calculations. Place your answer in the blanks provided showing units and the correct number of significant figures.

- _________________________

What is the molar mass of Al(ClO_{4})_{3}? - _________________________ _________________________

You have a sample of NaCl with a mass of 36.2 g. How many moles of NaCl is in your sample? How many molecules? - _________________________

You have a sample of 2.12 mol H_{2}O. How many grams of H_{2}O do you have? - _________________________

What is the mass in grams of 6 billion trillion (6 × 10^{21}) molecules of UF_{6}? - _________________________

If you have 1.0 g of Na_{3}P and 1.0 g NaCl, which sample has more atoms of Na? Justify your answer with a calculation.