Question

165ml of gas at stp weighs 0.355g thus it's molar mass is?

Answer 1

165ml of gas = 0.355g
1ml. of gas = 0.355/165g
22400 ml of gas = 0.355*22400/165g
= 48.19g

Answer 2

☆☆ AS-SALAMU-ALYKUM ☆☆

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GIVEN VOLUME = 165ml = 0.165 LITRE

WE KNOW THAT

MOLES = VOLUME IN LITRE ÷ VOLUME AT STP

MOLES = 0.165 ÷ 22.4

MOLES = 0.00736

NOW

MOLES OF GAS = MASS OF GAS ÷ MOLAR MASS OF GAS X

MOLAR MASS OF GAS = MASS ÷ MOLES (MASS IS GIVEN WHICH IS 0.355g)

MOLAR MASS OF GAS = 0.355÷ 0.00736

MOLAR MASS OF GAS = 48.23 g/mol

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