Question

What is the mass of nh3 in a 80.0-cm3 sample that has a density of 0.92 g/cm3 and consists of 20% (by mass) nh3?

Answer 1

d = m/V
m = d×V
m = 0,92×80
m = 73,6g

73,6g --- 100%
Xg ------- 20%
X = (73,6×20)/100 = 73,6×0,2 = 14,72g NH₃

:)

Answer 2

The mass of NH3 will be 14,72 $NH_{3}$.

What is mass?

The mass of a thing is a measurement of how much matter it contains.

Calculation of mass:

Mass can be determined by the formula

d = m / v

m = mass, d = density and v = volume

It is given that, d = 0.92 g/cm3, volume = 80 cm3.

Now, put the value of given data in mass formula.

m = d × v

m = 0.92 × 80.0

m = 73.6 g.

Now,

It is known as  73.6 g = 100 %

X g = 20 %

X = (73.6 g × 20 )/ 100

X = 14,72 $NH_{3}$.

Therefore, the mass of NH3 will be 14,72 $NH_{3}$.

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