Question

calculate the mass of a) 3.011*10²³ no. of hydrogen atom b) 6.022*10²³ no. of hydrogen molecule

Answer 1

$$\begin{gathered} \text{a)\hspace{0.17em}Molar mass of hydrogen atom}=1\text{g} \\ {\text{Mass of 6.022×10}}^{23}\text{atoms}=1\text{g} \\ {\text{Mass of 3.011×10}}^{23}\text{atoms}=\frac{1}{6.022\times {10}^{23}}\times 3.011\times {10}^{23}=0.5\text{g} \\ \text{b) Molar mass of hydrogen molecule = 2 g} \\ \text{Mass of}6.022\times {10}^{23}\text{molecules}=2\text{g} \end{gathered}$$