Stoichiometry
A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is

N₂O₄
None of these
N₂O₃
N₂O₅

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Stoichiometry
Pick out the wrong unit conversion of heat transfer co-efficient.

1 BTU/ft².hr.°F = 4.88 kcal/m².hr.°C = 20.44 kJ/m².hr°C = 5.678 W/m².°C
1 kcal/m².hr.°K = 1.163 W/m².°C
1 W/m² . °C = 0.1761 BTU/ft².hr.°F
1 kcal/m².hr.°C = 0.2048 BTU/ft².hr. °F. = 1.163 W/m².°K

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