Question

the vapour density of a gas is 35.5 the volume occupied by 3.55g of the gas at ntp is

Answer 1

Answer is 1.135 liters ,first use formula to find molar mass =2×vapour density , after finding molar mass from question u have given mass 3.55grams ,u have now given mass and molar mass . number of moles =given mass/molar mass after getting number of moles= 0.05,  equate 1mole =22.7 liters at ntp and 0.05 moles=?liters .cross multiply ,0.05 × 22.7=1.135liters

Answer 2

#hey there!!
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mass of gas(m) = 3.55 g

here VD = 35.5

we know that :

>> Molecular mass(M) = 2× VD

= 2×35.5 = 71.0 g

>> no. of moles of gas = m/M

= 3.55/71.0

= 0.05 mole

now , we know :

◆ 1 mole of gas occupies = 22.4 L

> 0.05 mole of gas occupies = 0.05×22.4

= 1.12 L

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◆Hope it will help you