Chemistry C5 - Percentage Composition and Empirical Formula help

I've got a few questions and want to confirm if the answers are correct.

= Question = Only question 13
= Working out

Sorry guys, if my working out is unclear. I've written up my answers onto a word document and made a slight change in part (c) where I found a mistake in my working out and I've realised that I've changed the answer to something else which is hopefully correct.
I've only got my answers in this new picture - not the questions.

I'd like to help, but none of your links seem to work.

I'd like to help, but none of your links seem to work.

Here you go

so you had no. of moles in the order of 3.225, 16.2 and 3.22.
to find the empirical formula you divide it by 3.22 which is the smallest out of 3.
so you get: 3.225/3.22=1.00... or 1
16.2/3.22=5.03... or 5
3.22/3.22=1
basically you get decimal numbers and you round those no. because empirical formula is the simplest ratio and written in whole numbers and not in decimal.
don't think too much and you wrote 3.222 that's wrong because the original ans is 3.2214 and 4 is smaller than 5 so it will be 3.221 not 3.222.

so you had no. of moles in the order of 3.225, 16.2 and 3.22.
to find the empirical formula you divide it by 3.22 which is the smallest out of 3.
so you get: 3.225/3.22=1.00... or 1
16.2/3.22=5.03... or 5
3.22/3.22=1
basically you get decimal numbers and you round those no. because empirical formula is the simplest ratio and written in whole numbers and not in decimal.
don't think too much and you wrote 3.222 that's wrong because the original ans is 3.2214 and 4 is smaller than 5 so it will be 3.221 not 3.222.

I've got a lot more questions to ask later on today, will you be able to help if I post them in like 2 hours :O?


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