4) Calculate the mass of
(b) 0.07 mole of HCI
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4) Calculate the mass of
(b) 0.07 mole of HCI
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Verified answer
2.555 g is the required answer.
GIVEN:
Number of moles, n = 0.007
TO FIND:
Mass of 0.07 moles of HCl , m
FORMULA:
Number of moles, n = mass / molecular mass
n = m/ M
Here M is the molecular mass of HCl
SOLUTION:
STEP1:
TO FIND MOLECULAR MASS OF HCl:
We know that,
Molecular mass of HCl = Atomic mass of H + Atomic mass of Cl
Molecular mass, M = 1 + 35.5
M = 36.5 g
Molecular mass of HCl is 36.5 g
STEP 2:
TO FIND REQUIRED MASS :
n = m/ M
0.07 = m / 36.5
m = 0.07 × 36.5
m = 2.555 g
ANSWER:
Mass of 0.07 moles of HCl is 2.555 g