Question

Use the References to access imp A sample of hydrogen gas has a mass of 48.3 grams. How many H, molecules are there in the sample? molecules Submit Answer & Next

Answer 1

Answer: The number of hydrogen molecules in the given amount is
`1.454* 10^(25)`

Step-by-step explanation:

To calculate the number of moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}`

Given mass of hydrogen gas = 48.3 g

Molar mass of hydrogen gas = 2 g/mol

Putting values in above equation, we get:

`\text{Moles of hydrogen gas}=(48.3g)/(2g/mol)=24.15mol`

According to mole concept:

1 mole of a compound contains
`6.022\time 10^(23)` number of molecules

So, 24.15 moles of hydrogen gas will contain =
`24.15* 6.022* 10^(23)=1.454* 10^(25)` number of molecules.

Hence, the number of hydrogen molecules in the given amount is
`1.454* 10^(25)`