Question

calculate the number of moles of hydrogen in 0.448 liters of hydrogen gas at STP​

Answer 1

Answer:

no. of moles =given volume÷volume at STP

=0.448÷22.4

=0.02 moles

answer is 0.02 moles

Answer 2

At STP, 0.448 liters of Hydrogen gas contains 0.02 moles of hydrogen.

Given:

Weight of hydrogen = 0.448 liters

To find:

Number of moles of hydrogen in 0.448 liter of hydrogen gas at STP.

Calculation:

Let the number of moles of hydrogen in 0.448 liter of hydrogen gas at STP be 'X'.

At STP, 1 mole of all gas weighs 22.4 liters. Thus it can be expressed as

1 mole of hydrogen gas = 22.4 liters

∴ X mole of hydrogen gas = 0.448 liters

When the above given equations are cross multiplied, it gives

X × 22.4 = 1 × 0.448

X = $\frac{1\times 0.448}{22.4}$

X = $\frac{0.448}{22.4}$

X = 0.02

Conclusion:

Number of moles of hydrogen in 0.448litre of hydrogen gas at STP is calculated as 0.02 moles.

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