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Mole Concept

/(3)Only b, c...

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/(3)Only b, c55 280 mL of sulphur vapours weigh 3.2 g at NTPalculate the number of atoms present permolecule(2) 4(4 86

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g

of sulphur is vaporised, it gives 280

m l

of vapor at 273

^{o} C

m m

pressure. Molecular formula of sulphur is:

If Avogadro's number is A $_{0}$ , the number of sulphur atoms present in 200 mL of 1N H $_{2}$ SO $_{4}$ is

Q. Calculate the number of atoms in

3.2

Complete the following calculations.

Calculate the mass of calcium that will contain the same number of atoms as are present in

3.2

gm of sulphur.
[Atomic masses:

S = 32, C a = 40

Q. Number of g-atoms of sulphur present in

80.25

g of sulphur are

S = 32

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