Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    2
    ReputationRep:
    Hello, got stuck on this question, could anybody please help with this. The answer is C, I don't get it
    Attached Images
     
    Offline

    6
    ReputationRep:
    (Original post by snmk007)
    Hello, got stuck on this question, could anybody please help with this. The answer is C, I don't get it
    simple mole ratios, 2 moles of ethyne to 5 moles of oxygen, so 20cm of ethyne reacts with 50 cm of oxygen. this means there is 450cm of gas remaining but 4 moles of carbon dioxide are made and we know 2 moles is 20cm so 4 moles is 40cm. add this to 450 and you have 490.
    • Thread Starter
    Offline

    2
    ReputationRep:
    Thanks
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.