Solution :
Molar mass of
is :
M = 6×12 + 6×1 g
M = 78 g
78 gram of
contains
molecules.
So, 89.5 gram of
contains :
![n = 6.022 \times 10^{23} \times \dfrac{89.5}{78}\\\\n = 6.91 \times 10^{23}](https://tex.z-dn.net/?f=n%20%3D%206.022%20%5Ctimes%2010%5E%7B23%7D%20%5Ctimes%20%5Cdfrac%7B89.5%7D%7B78%7D%5C%5C%5C%5Cn%20%3D%206.91%20%5Ctimes%2010%5E%7B23%7D)
Now, from the formula we can see that one molecule of
contains 2 hydrogen atom . So, number of hydrogen atom are :
![h = 2\times 6.91 \times 10^{23}\\\\h = 1.38 \times 10^{22}\ atoms](https://tex.z-dn.net/?f=h%20%3D%202%5Ctimes%206.91%20%5Ctimes%2010%5E%7B23%7D%5C%5C%5C%5Ch%20%3D%201.38%20%5Ctimes%2010%5E%7B22%7D%5C%20atoms)
Hence, this is the required solution.
a or c becuse it means you should answer it very wiseley