If the atomic mass unit 'u' were defined to be (1/5)th of the mass of an atom of C -12, what would be the atomic weight of nitrogen in amu or 'u' in this state? Atomic weight of N on conventional scale is 14 :

Question

If the atomic mass unit 'u' were defined to be (1/5)th of the mass of an atom of C -12, what would be the atomic weight of nitrogen in amu or 'u' in this state? Atomic weight of N on conventional scale is 14 : (A) 6.77 u (B) 5.834 u (C) 14 u (D) 23 u

Tardigrade Admin · Accepted Answer

Apply, weight =( text absolute at. wt. /1 amu ) 14=( text absolute at. wt. /(1)12 × (12) N A g ...(1) x =( text absolute at. wt. /(1)5 × (12) N A g ...(2) x=5.83 amu

Q. If the atomic mass unit 'u' were defined to be $\frac{1}{5}^{t h}$ of the mass of an atom of $C - 12$ , what would be the atomic weight of nitrogen in amu or 'u' in this state? Atomic weight of $N$ on conventional scale is $14$ :

$6.77 u$

$5.834 u$

$14 u$

$23 u$

Apply,

weight $= \frac{absolute at. wt.}{1 am u}$

$14 = \frac{absolute at. wt.}{\frac{1}{12} \times \frac{12}{N _{A}} g}$ ...(1)

$x = \frac{absolute at. wt.}{\frac{1}{5} \times \frac{12}{N _{A}} g}$ ...(2)

$x = 5.83 am u$

Q. If the atomic mass unit 'u' were defined to be 51​th of the mass of an atom of C−12, what would be the atomic weight of nitrogen in amu or 'u' in this state? Atomic weight of N on conventional scale is 14 :

6.77u

5.834u

14u

23u