Question

An organic compund made of H, C and N contains 20%of nitrogen. Its molecular weight is.
a. 70. b. 140. c. 100. d. 65

Answer 1

Answer:

the answer is 65 of this question

Answer 2

Explanation:

Let total mas of organic compound taken be 100gand its molecular weight is M

Mass of nitrogen = 20 / 100 =20g

no. of molecule = atomic no. × no. of molecular compound

20 / 14 = atomic no. ×100/M

M = atomic no. × 100 × 14 / 20

atomic no × 70

= 70 ( for minimum molecular weight atomic is assumed as 1 )

therefore a ) 70

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