Question

C2H4(g)+ 3O2 (g)= 2CO2 (g)+2H2O(l)
how many
(a) moles of O2 are consumed
(b) how many moles of H2O are formed when 4.16*10-2mol
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Answer 1

Answer:

In your question, CO2 are formed not O2. O2 is consumed here, this is combustion Reaction of ethene gas.

1 mole of ethene requires 3 moles of Oxygen to produce 2 moles of Carbon Dioxide and 2 moles of Water.

Going with this Equation,

4.16 x 10^-2 moles of C2H4 requires how of Oxygen?

1 mole of methene requires ..…… 3 moles of Oxygen

4.16 x 10^-2 requires …………….…………. ?

Cross multiply i.e.

No. Of moles of Oxygen require = (4.16 x 10–2 x 3)/1

No. Of moles of Oxygen require = 12.48 x 10^-2 moles

Similarly do it for CO2 produce

1 mole of methene forms …………….. 2 moles of CO2

4.16 x 10^-2 forms …………………………….. ?

Cross multiply,

No. Of moles of CO2 produce = (4.16 x 10^-2 x 2)/1

No. Of moles of CO2 produce = 8.32 x 10^-2 moles.

Explanation: