Question

carbon and oxygen combines in ratio 3:8 by mass to form carbon dioxide . what will be mass of oxygen required to combine completely wuth 4.5g of carbon? what would be the mass of carbon dioxide produced?

Answer 1

Carbon and oxygen reacts in a ratio 3:8 by mass to form Carbon dioxide

Hence the required reaction is ;

C + O2 --> CO2

Carbon : Oxygen = 3 : 8

Due to law of constant proportion, the mass ratio in which the reactants will react will remain constant.

Carbon --> 4.5 g
Oxygen --> ?

C : O2 = 3:8
4.5 : O2 = 3:8

4.5/O2 = 3/8

Mass of oxygen required
= (4.5/3)×8
13.5×8
=

Answer 2

=12

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