Question

Which of the following contains the minimum number of molecules?
29 N:
19 H
1900,
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Answer 1

Answer:

Let the fraction be

b

a

Numerator= denominator-4

a=b−4⇒b−a=4

If 1 added to both numerator and denomator then fraction =

2

1

b+1

a+1

=

2

1

2a+2=b+1

2a−b=−1

(2a−b)+(b−a)=4−1

a=3,b=7

Fraction=

7

3