Question

one gram of carbon are burnt in a closed vessel containing 1.5 g of oxygen. which reactant is left in excess? find the mass of the excess reactant and mass of the product formed
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Answer 1

Answer:

Balanced reaction is:

2Mg+O

2

→2MgO

According to the reaction 2 mol (or 2×24.3=48.6g) Mg reacts with 32 g oxygen. 1 g of Mg requires =

48.6

32

=0.66g oxygen but given oxygen is 0.5 g ∴ oxygen is the limiting reagent

0.5 g oxygen can burn ==

32

48.6

×0.5=0.75g Mg

Excess of Mg left =1−0.75=0.25g

Answer 2

Answer:

I think the above ans is correct