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Byju's Answer
Standard XII
Chemistry
Molecular Speeds - Vrms, Vavg, Vmps
1. What is th...
Question
1. What is the mass of 4 moles of aluminium.
2. How many number of particles are there is 45 g of
ϕ
sodium.
3. How many number of moles are there is 2 grams of aluminium. Atomic mass 27
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Solution
1. Molar mass of Aluminium = 26.98 g/mol.
Mass of 4 moles = 4
×
26.98 = 107.92 g
2. Number of moles in 46 g of sodium =
46
22
.
98
=
2
.
001
m
o
l
e
s
Number of atoms in 2.001 moles of sodium = 2.001
×
6.022
×
10
23
= 12.05
×
10
23
.
3. Number of moles of Aluminium =
1
26
.
98
=
0
.
037
g
/
m
o
l
.
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