1) An organic compound containing oxygen, carbon, hydrogen and nitrogen contains 20% carbon, 6.7 % hydrogen and 46.67 % nitrogen. Its molecular mass was found to be 60. Find the molecular formula of the compound.
2) 1.00 g of hydrated salt contains
0.2014 g of iron 0.1153 g of sulfhur
0.2301 g of oxygen and
0.4532 g of water of crystallisation find empirical formula .
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Answer:
Answer
C H N O
20 6.7 46.67 26.63
12
20
6.7
14
46.67
16
26.63
1.6 6.7 3.3 1.6
1 4 2 1
CH
4
N
2
O formal mass=60
molecular mass=60
n=
60
60
=1
Molecular formula CH
4
N
2
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