Question

Calculate the number of atoms in each of the following
a) 52 moles of Ar
b) 52u of helium
c) 52g of helium.
plz give me ans in easy way.​

Answer 1

Calculate the number of atoms in each of the following

(i) 52 moles of Ar

(ii) 52 u of He

(iii) 53 g of He

ANSWER

(i) 1 mole of Ar =6.022×10^23

atoms of Ar

52 mol of Ar=52×6.022×10 ^23

atoms of Ar=3.131×10 ^25

(ii) Atomic mass of He = 4amu

Or

4amu is the mass of He atoms = 1

Therefore 52 amu is the mass of He atoms=0.25×52=13 atoms of He

(iii) Gram atomic mass of He = 4g

Or

4g of He contains =6.022×10 ^23 atoms

Therefore 52 g of He contains=

4×52÷6.022×10^23

​

=7.83×10 ^24

atoms

BTS(◍•ᴗ•◍)❤EXO

Answer 2

Answer:

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