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10.) In a Dumas experiment to determine the molar mass of a substance, it was found that a 4.00 gram of the vapour occupies 2
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Answer #1

At STP, volume of 1 mole gas = 22.4 L = 22400 ml

Now, mass of 250 ml vapour = 4 g

Mass of 22400 ml vapour = 4×22400/250 g

= 358.4 g

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