Question

Calculate the mass of 1 atom of C14.

• A. 2.324 $\times {10}^{-22}$ gm
• B. 2.324 $\times {10}^{-21}$ gm
• C. 2.324 $\times {10}^{-24}$ gm
• D. 2.324 $\times {10}^{-20}$ gm

Answer 1

The correct option is

B

2.324 $\times {10}^{-21}$ gm

Carbon -14 is an isotope of carbon which posses relative atomic mass of 14

1 mole of C14 contains = 6.022 $\times {10}^{23}$ atoms of C

6.022 $\times {10}^{23}$ atoms of C = 14 grams

1 atom of C = $\frac{14}{6.022\times {10}^{23}}$ = 2.324 $\times {10}^{-23}$ gm