Name: Avogadro's Law and Its Uses
Uploaded: 2019-07-19
Duration: 10 min 28 s
Description: Avogadro's law is an experimental gas law relating the volume of a gas to the amount of substance of gas present. Let us learn more through this video.

Question

Match the following:

	Column I		Column II
(i)	$88 g of {CO}_{2}$	(a)	$0.25 mol$
(ii)	$6.022 \times 10^{23} molecules of H_{2} O$	(b)	$2 mol$
(iii)	$5.6 litres of O_{2} at STP$	(c)	$1 mol$
(iv)	$96 g of O_{2}$	(d)	$6.022 \times 10^{23} molecules$
(v)	$1 mol$ of any gas	(e)	$3 mol$

Accepted Answer

For ${CO}_{2}$ gas, molecular mass is $44 g$ . $44 g$ of carbon dioxide contains one mole, so that $88 g$ of carbon dioxide contains two moles.

One mole of any substance contains Avogadro number of particles. One mole of water contains $6.022 \times 10^{23} molecules$ .

$32 g$ of oxygen is equal to one mole so that $96 g$ of oxygen is equal to three moles.

One mole of gas occupies $22.4 litres$ of volume. $5.6 litres$ of gas contains $0.25$ mol.

Column I Column II

(i) $88 g of {CO}_{2}$ (b) $2 mol$

(ii) $6.022 \times 10^{23} molecules of H_{2} O$ (c) $1 mol$

(iii) $5.6 litres of O_{2} at STP$ (a) $0.25 mol$

(iv) $96 g of O_{2}$ (e) $3 mol$

(v) $1 mol$ of any gas (d) $6.022 \times 10^{23} molecules$

	Physical quantity		Unit
(i)	Molarity	(a)	${gmL}^{- 1}$
(ii)	Mole fraction	(b)	mol
(iii)	Mole	(c)	Pascal
(iv)	Molality	(d)	Unitless
(v)	Pressure	(e)	mol $L^{- 1}$
(vi)	Luminous intensity	(f)	Candela
(vii)	Density	(g)	mol ${kg}^{- 1}$
(viii)	Mass	(h)	${Nm}^{- 1}$
		(i)	kg

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