Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    When Barium nitrate is heated it decomposes as follows:

    Ba(NO3)2 (s) ? BaO (s) + 2NO2 (g) + 1/2O2 (g)

    Calculate the mass of barium oxide which can be obtained by decomposing 5.00g of barium nitrate.

    All help appreciated, thanks a lot.
    Offline

    1
    ReputationRep:
    As moles =mass/ rfm, you can work out the moles of barium nitrate.
    do 5/(the RFM of barium nitrate-which you can work out by adding all the mass numbers of the elements in it)= the moles of barium nitrate
    The mole ratio is1:1 (which you can tell bc there is no number in front of the BaO, which means that there is one mole of that molecule.
    Therefore, the mole number you just calculated = mass/(rfm of BaO)
    So times (as you are rearranging the equation to get mass =)the mole number you calculated by the rfm of Bao to get the mass of BaO produced
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 19, 2015
Poll
Do you like carrot cake?

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.