More help with Chemistry homework please?(10 points)?

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Kawaii布丁

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N2O5 gas decomposes to form nitrogen dioxide gas and oxygen gas

1) How many volumes of N2O5 will form 4 volumes of nitrogen dioxide?
2) How many volumes of N2O5 is needed to form 3 volumes of oxygen?
3) If there is 10 volumes of N2O5, how many volumes of nitrogen dioxide & oxygen will form?

C4H10(Butane gas) burns in oxygen to form carbon dioxide & water.
1) What volume of carbon dioxde will be formed from 10cm3 of Butane?

Also could someone please just briefly explain what 2dm3 is??
Thanks
 
to answer such question it is important to know the balance equation so that u can find out the ratio
N2O5----> 2NO2 + 1/2O2
1)
N2O5:NO2
1:2
X:4
so X=2 volumes

2)
N2O5:O2
1:1/2
X:3
so X=6 volumes

C4H10+ 13/2O2---->4CO2 + 5H2O
1)
C4H10:CO2
1:4
10:X
X=40cm3


the 2dm3 u mention izit 2dm^3?
if so it equal to 2Litres
1dm^3=1L
 
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