2. What is the empirical formula of a compound formed by the reaction of 102.6g of Ca and 97.4g of F?
3. Calculate the molecular formulas of the following compounds. The molecular or formula mass of each is given.
a.) CH, 78g/mol
b.) HgCl, 236.1 g/mol
4. Convert from grams to moles:
a.) 44g of carbon dioxide
b.) 51g of ammonia
c.) 49g of hydrogen sulfate also called sulfuric acid
5. Calculate the formula mass:
a.) calcium chloride
b.) sodium carbonate decahydrate
c.) gallium sulfate
d.) ammonium sulfate
6. Determine the empirical formula of a compound tha is 50% S and 50% O
7. Calculate the percentage composition for each element in potassium nitrate.
8. Determine the empirical formula:
a.) 80 g Ba 19g O l g H
b.) 3% H 32% P 65% O
9. Determine the molecular formula for a compound that is 85% C and 15% H , with a molecular mass of 28.