Calculate the number of:
a) particles in 0.1 mole of any substance.,
b) hydrogen atoms in 0.1 mole of H2SO4,
c) molecules in one kg of calcium chloride

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Solution

a) We know that,
1 mole contain 6.022×10²³ atoms.

So,
No. of particles in 0.1 mole of hydrogen = 0.1×6.022×10²³ atoms = 6.022×10²² particles (Atoms).

b) 1 mole of H2S04 has 2×6.022×10²³ H atoms
then,
0.1 mole has 12.044× 10²² H atoms..

C) Given weight= 1kg = 1000g

gram molecular weight of cacl2=40+71= 111g

no. of molecules=(given weight/gram molecular weight ) x avagadro number

(avagadro number = 6.023 x 10^23)

No. of molecules = (1000/111) x 6.023 x 10^23 = 5.4 x 10^24

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Calculate the number of: a) particles in 0.1 mole of any substance., b) hydrogen atoms in 0.1 mole of H2SO4, c) molecules in one kg of calcium chloride

Calculate the number of:
a) particles in 0.1 mole of any substance.,
b) hydrogen atoms in 0.1 mole of H2SO4,
c) molecules in one kg of calcium chloride