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Grade: 12th Pass

                        

A Gaseous compound of nitrogen and hydrogen contains 12.5% ( by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is : 1. NH2 2. N3H 3. NH3 4. N2H4

6 years ago

Answers : (2)

Aarti Gupta
askIITians Faculty
300 Points
							The empirical formula for the compound comes out to be NH2.
Thus empirical formula mass = 14 + 2* 1 = 16
Calculation of molecular formula
n = Molecular mass/Empirical formula mass
Now,
molecular mass = 2 * density
= 2* 16 = 32
Therefore,
n = 32/16 = 2
Thus molecular formula will be = Empirical formula * n
molecular formula = NH2 * 2 = N2H4
ANS. N2H4
Thanks& Regards
Aarti Gupta
askiitians Faculty
6 years ago
Meghana
13 Points
							N:H=87.5:12.5=1:2Therefore  empirical  formula is *NH2* E. F weight is 16 gM. F = (MF. Wt÷EF wt)* E. FM. F=(32÷16)*NH2=
						
2 years ago
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