10. (a) The mass of 5.6 litres of a certain gas at STP is 12 g.
What is the relative molecular mass or molar mass of
the gas?
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Answer:
MOLAR MASS IS THE AMOUNT OF MASS OF SUBSTANCE IN ONE MOLE
M.V.=5.6L
M.M.=12g=0.012 Kg
R.M.M.= (M.M.×9.8)/M.V.
R.M.M= ( 0.012Kg × 9.8 ) / 5.6L
= 0.021 kg-wt / L
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