Question

Calculate number of moles of hydrogen in 0.448 litre of hydrogen gas at STP​

Answer 1

Answer:

0.02

Explanation:

1 mole of hydrogen gas at STP =22.4L

No. of liters of mole of hydrogen gas at STP= 0.448/22.4= 0.02

Answer 2

Answer:

Explanation:

We are given volume of hydrogen gas at STP ( Standard temperature and Pressure ) as 0.488 litres.

We have to calculate the number of mole.

Since we are given the volume, number of mole can be calculated as :

⇒ Num. of mole = Volume / 22.4

[ 22.4 because of STP ]

⇒ Num. of mole = 0.488 / 22.4 [ Given ]

⇒ Num. of mole = 0.02 mole

Hence, The number of mole of Hydrogen gas in this case is 0.02 mole

Some Information :-

• If we have to find the number of mole of an atom or molecule we can do so using the given formula :

Num. of mole = Mass given / Molar mass

• 1 mole of an atom or molecule has 6.022 × 10²³ atoms or molecules respectively.