Answer to Question #65594 in Chemistry for Sarah H

Question

1.)How much iron is present in 8 . 13 g of iron(III) oxide? Answer in units of g.

2.) A chemist wants to extract the gold from 62 . 21 g of AuCl 3 · 2 H 2 O (gold(III) chloride dihydrate) by electrolysis of an aqueous solu- tion. What mass of gold could be obtained from this sample? Answer in units of g.

3 (part 1 of 2) 10.0 points The molecular weight of erbium is 167 . 259 g/mol, sulfur is 32 . 065 g/mol, oxygen is 15 . 9994 g/mol, hydrogen is 1 . 00794 g/mol, carbon is 12 . 0107 g/mol, tin is 118 . 71 g/mol, and strontium is 87 . 62 g/mol. What is the percentage of C in glycerol? Answer in units of %.

4 (part 2 of 2) 10.0 points What is the percentage of H in glycerol? Answer in units of %.

5). 10.0 points What is the % carbon, by weight, in a 0 . 166 g sample of C 2 H 6 ? Answer in units of %.