Question

Q. Apply the law of constant proportion to calculate the mass of oxygen that will be used up for combustion of 5g of Carbon .

Answer 1

hey friend , this is the answer -

carbon will burn with oxygen to form CO2
now in this ,
C=12 and
O=16*2 = 32
it means that 12g of carbon will need 32g of oxygen to form CO2
so 1g of carbon will need=
32/12 =2.6
2.6g of oxygen
5g of carbon will need=
5*2.6 = 13
13g of oxygen