# Chemistry

posted by .

Determine the simplest formula for compounds that have the following analyses. The data may not be exact.

A.
28.5% iron, 48.6% O, 22.9% S

This is what I did:
28.5g Fe 1 mole Fe/55.847g = .51 mole
48.6g O 1 mole O/15.999g = 3.04 mole
22.9g S 1 mole S/32.064g = .71 mole

(Fe1.0 O6.0 S1.4)5 = Fe5 O30 S7

• Chemistry -

The thing that strikes me is the sum of the compositions is exactly 100 percent, yet the problem says it may not be exact. So if Fe were reduced by .6gram, and S were increased by .6 gram. ... one gets Iron(II) sulfite

• Chemistry -

I don't get it either. But overall, did i get my calculation right? or did i do the process right?

• Chemistry -

The process looks ok to me. The statement about not being exact but the percentages add to 100.0 (plus few of us have heard of Fe5S7O30)makes me think that the problem was made up.

• Chemistry -

yea they are completely made up.

## Similar Questions

1. ### Chemistry

Iron reacts with sulfur to form a sulfide. If 2.561 g of iron reacts with 2.206 g of sulfur, what is the simplest formula of the sulfide?
2. ### Chemistry+empirical formula

What is the empirical forumla (lowest whole ratio) of the compounds below?
3. ### chemistry

given the reactant amounts specified in each chemical eguation, determine the limiting reactant in each case: a. HCL+NaOH->NaCl+H2O 2.0 mole of HCl 2.5 mole NaOH b. Zn+2HCl->ZnCl2+H2 2.5 mole Zn 6.o mole HCl c. 2Fe(OH)3+3H2SO4->Fe2(SO4)3+6H2O …
4. ### Chem

Could you please tell me if these are right?
5. ### chemistry

Determine the theoretical yield of C when each of the following amounts of A and B are allowed to react in the generic reaction: A+2B-->3C 1) 1mol A; 1 mole B 2) 1mole A; 3 mole B 3) 2mole A; 2 mole B 4) 32mole A; 68 mole B
6. ### chemistry

Determine the of mole of water molecules in one mole of a sample of an iron containing (nh4)2so4. FeSO4. nH2O. titrate a solution of the iron containg (solution Y)
7. ### Chemistry

According to the balanced equation 6 moles of carbon dioxide will react with 6 moles of water to produce 1 mole of sugar and 6 moles of oxygen. What are the molar masses of the following compounds from the photosynthesis equation?