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a
4Fe(s)+3O2(g)⟶2Fe2O3(s)
b
2Mg(s)+O2(g)⟶2MgO(s)
c
P4(s)+O2(g)⟶P4O10(s)
d
CH4( g)+2O2( g)⟶CO2( g)+2H2O(g)
answer is C.
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Detailed Solution
The following are the balanced equations. * 4Fe(s)+3O2(g)⟶2Fe2O3(s) * 2Mg(s)+O2(g)⟶2MgO(s)* CH4(g)+2O2(g)⟶CO2(g)+2H2O(g)The unbalanced equation isP4(s)+O2(g)⟶P4O10(s)It can be balanced as follows:P4(s)+5O2(g)⟶P4O10(s)