Complete the following problems:
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Moles/Mass/Molecules Practice Problem Worksheet
Complete the following problems:
1. Convert 11.03 moles of calcium nitrate to grams.
2. How many molecules are contained in 103.4g of sulfuric acid?
3. 3.25 x 1024 molecules of dinitrogen pentoxide would be how many moles?
4. What would be the mass of 9.03 x 1021 molecules of hydrobromic acid?
5. A sample of iron (III) chloride has a mass of 26.29g. How many moles would this be?
Complete the following problems - Answers
1. Convert 11.03 moles of calcium nitrate to grams.
11.03 mol Ca(NO3)2 164.1g Ca(NO3)2
= 1810.02g Ca(NO3)2
1 mol Ca(NO3)2
2. How many molecules are contained in 103.4g of sulfuric acid?
103.4g H2SO4 1 mol H2SO4 6.02 x 1023 molecules H2SO4
= 6.35 x 1023 molecules H2SO4
98.08g H2SO4 1 mol H2SO4
3. 3.25 x 1024 molecules of dinitrogen pentoxide would be how many moles?
3.25 x 1024 molecules N2O5 1 mol N2O5
= 5.40 mol N2O5
6.02 x 1023 molecules N2O5
4. What would be the mass of 9.03 x 1021 molecules of hydrobromic acid?
9.03 x 1021 molecules HBr 1 mol HBr 80.91g HBr
= 1.21g HBr
6.02 x 1023 1 mol HBr
molecules HBr
5. A sample of iron (III) chloride has a mass of 26.29g. How many moles would this be?
26.29g FeCl3 1 mol FeCl3
= .16 mol FeCl3
162.2 g FeCl3
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