• # question_answer 74)   Calculate the average atomic mass of hydrogen using the following data : Isotope % Natural abundance Molar mass $^{1}H$ 99.985 1 $^{2}H$ 0.015 2

Average atomic mass $\text{= }\!\!\Sigma\!\!\text{ }\frac{\text{ }\!\!%\!\!\text{ Abundance}}{\text{100}}\text{ }\!\!\times\!\!\text{ Atomic}\,\text{mass}$  $=\frac{99.985}{100}\times 1+\frac{0.015}{100}\times 2$ $=0.99985+0.0003$ $=1.00015\,amu$