Question

Q1) 1 nanometer= ________ metre

Q2) If 110g of copper sulphate is present in 550g of solution, calculate the concentration of a solution.

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Answer 1

Answer:

1. 1nanometer=10^-9 or 0.000000009

2.Mass by mass percentage of a solution = [(Mass of solute) / (Mass of solution)] X 100

Here, mass of solute ( cuSo4) = 110g

Mass of solution = 550 g

Therefore mass by mass percentage of solution = (110 X 100) / 550

= 20%

Hence, the concentration of the solution is 20%.