Question

$\begin{array}{ccc}Isotope& perNaturalabundance& Molarmass\\ {}^{1}H& 99.985& 1\\ {}^{2}H& 0.015& 2\end{array}$

The average atomic mass of hydrogen using the following data is _________.

Answer 1

Data:-

Isotope	Natural abundance	Molar mass
${}^{1}H$	99.985	1
${}^{2}H$	0.015	2

Formula:-

Average atomic mass=

$\frac{Atomicmassof{}^{1}H\times abundance+Atomicmassof{}^{2}H\times abundance}{100}$

$=\frac{1\times 99.985+2\times 0.015}{100}$

$=\frac{99.985+0.030}{100}$

$=1.00015$ .