Question

a chemical has a density of 1.2g /cm3 . 40 cm3 of it are mixed with 30cm3 of water. the density of solution is​

Answer 1

Answer:

1.11

Explanation:

Given,

The chemical has a density of 1.2g/cm3

40 cm3 has been mixed. Therefore, Volume1 = 40 cm3

we know,

density = mass/volume

1.2 = mass / 40

mass = 1.2 * 40

mass = 48 g

Hence, mass of solute = 48 g

It is mixed with 30 cm3 of water.

Water has a density of 1 gm/cm3

We know,

density = mass / volume

1 = mass / 30

mass = 30 g

therefore, total mass = (48 +30) g = 78 g

total volume after mixing both solutions = (40 + 30) cm3 = 70 cm3

therefore,

density = total mass/ total volume

density = (78/70) g/cm3

density = 1.11428571429

density = 1.11 (approx)