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Answer :

25g/30.01g = 0.83 moles

0.83(2/2) = 0.83 moles

0.83*46.005 = 38.2 grams

Answer:

2No+O2 gives 2No2

2 moles of No gives 2 moles NO2

Moles of No= 1.20/30=0.04

Moles = 0.04 ✖ 46=1.8 moles