A level chemistry question

1234kelly

I don’t really understand what the “minimum amount of oxygen “ implies? Or how to get to the correct answer ?

(edited 7 months ago)

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Reply 1

BankaiGintoki

Original post by 1234kelly

I don’t really understand what the “minimum amount of oxygen “ implies? Or how to get to the correct answer ?

So you have a reaction. You have either been given information on another reactant, or a product.
If the reactant (ensure it is the limiting reactant if there are multiple) or a product, find the moles
Use the mole ratio to find the moles of oxygen
Than find mass of oxygen using mass = moles x Mr

Reply 2

5hyl33n

Volunteer Team, Clearing and Applications Advisor

Original post by 1234kelly

I don’t really understand what the “minimum amount of oxygen “ implies? Or how to get to the correct answer ?

Can you upload the full question along with your working out, please? :yep:

Reply 3

1234kelly

Original post by 5hyl33n

Can you upload the full question along with your working out, please? :yep:

Omg Im so sorry I didnt realise I havent attached the question , I have just edited it with the question and I honesty still can’t get the right answer