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Question

Give a balanced equation for a direct combination reaction involving:
a) Two elements – one of which is a neutral gas and the other a yellow non-metal
b) Two elements – one of which is a neutral gas and the other a monovalent metal
c) Two compounds – resulting in formation of a weak acid

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Solution

Dear Student

a.) Neutral gas ----> O2
Yellow non-metal -----> S

Balanced equation -
3S + 4O2 ----> SO2 + 2SO3


b.) Neutral gas ----> O2
Monovalent metal ----> Na (with valency equal to 1)

Balanced equation is -
6Na + 2O2 -----> 2Na​2O + Na2O2


c.) CO2 and H2O reacts to form Carbonic Acid, H2CO3 (a weak acid)

Balanced equation -
CO2 + H2O ------> H2CO3


Regards

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