Question

The mass of 5-6 litres of a certain gas at STP is 12g. What is the relative molecular mass or molar mass of the gas ?

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Answer 1

Answer

48 g

Explanation

Given

mass of 5.6 L of a certain gas at STP is 12 g

To find

Molar mass of the gas

We know that at STP, 1 mole of a gas = 22.4 litres

⇒ 1 L = 1/22.4 moles

⇒ 5.6 L = 5.6/22.4 = 1/4 mole

We have 1/4 mole of gas at STP

Now, we know that

given mass/molar mass = mole

⇒ molar mass = given mass/mole

here, given mass = 12 g and mole = 1/4

⇒ molar mass = $\sf\frac{12}{\frac{1}{4}}$

⇒ molar mass = 12 × 4 = 48 g

Answer 2

Answer:

Your answer is 48 gram.