Use dimensional analysis to do these conversions.

1. Given 100 grams of sulfuric acid, how many atoms of hydrogen are in the sample?

    

    

2. Given 4.669 X 10⁴⁰ molecules of C₂H₅OH, what is the mass of the sample in grams?

    

    

3. How many calcium ions are needed to have a mass of 250 grams?

    

    

4. Given 100 grams of nitric acid, how many moles of nitric acid are in the sample?

    

    

5. What is the mass, in grams, of 7.5 moles of oxygen molecules?