The number of moles present in 11-2 litres nbsp-of CO-2 nbsp-at S-T-P is-0-5 mol-2-0 mol-2-5 nbsp-mol-0-2 mol-

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Volume of Gases and Number of Moles

The number of...

Question

The number of moles present in 11.2 litres of ${CO}_{2}$ at S.T.P is:

0.5 mol

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2.0 mol

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2.5 mol

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0.2 mol

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Solution

The correct option is A
0.5 mol

Given volume of carbon-dioxide $({CO}_{2})$ at STP = 11.2 L
Molar volume at STP (in litres) = 22.4 L
In case of gases at STP,
Number of moles = $\frac{Volume at STP (litres)}{Molar volume at STP (litres)}$ .... (i)
Inserting the values of the volume of carbon-dioxide at STP and molar volume at STP (litres) in equation (i) we have:
Number of moles = $\frac{11.2}{22.4}$
$∴$ Moles present in 11.2 litres of ${CO}_{2}$ at S.T.P is 0.5 mol.

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The number of moles present in 11.2 litres of CO2 at S.T.P is:

The number of moles present in 11.2 litres of ${CO}_{2}$ at S.T.P is: