1. What is the mass% of oxygen in a sample containing 7.00g of sulfur and 28.00 g of oxygen? 2. How many atoms of hydrog

[answerhappygod]

1. What is the mass% of oxygen in a sample containing 7.00g ofsulfur and 28.00 g of oxygen?
2. How many atoms of hydrogen are in a sample of ammoniumcyanide containing 16.0*10-21 g of nitrogen?
3. What is the mass% of fluorine in sulfurhexafluoride?
4.What is the mol% of carbon in Iron(II) acetate?
5. What is the mol % of nitrogen in a sample containing30.0g of nitrogen and 16.0g of chlorine?
6. A 45.0g sample was found to consist of 65.0% carbon bymass. Calculate the mass of carbon in the sample.
7. A 47.6g sample was found to consist of 35.0% oxygen bymass with the remaining mass being calcium, calculate the mass ofcalcium in the sample.
8. A 13.5g sample was found to be 45.0% sulfur by mass.Calculate the moles of sulfur in the sample.
9. A 5.65g sample was found to consist of oxygen, nitrogenand hydrogen. The sample is 5.00% hydrogen and 20.0% nitrogen bymass. Calculate the moles of oxygen in the sample.