Answer to Question #271136 in Physics for hanis

Question

4. A cylinder contains a hydrogen gas of volume 2.40  10−3 m3 at 17 C and 2.32 

106 Pa. Calculate

a. the number of moles of hydrogen in the cylinder,

b. the number of molecules of hydrogen in the cylinder,

c. the mass of the hydrogen (given the molar mass of hydrogen = 2 g mol−1).

Answer 1

a. The number of moles:

$$n=\frac{PV}{RT}=2.31\text{ mol}.$$

b. The number of molecules:

$$N=nN_A=1.39·10^{24}.$$

c. The mass is

$$m=\Mu n=4.62\text{ g}.$$