How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO₃? The concentrated acid is 70% HNO₃.

(a) 45.0 g conc. HNO₃

(b) 90.0 g conc. HNO₃

(c) 70.0 g conc. HNO₃

(d) 54.0 g conc. HNO₃

Find the molality of 15% (w/vol.) solution of H₂SO₄ of density 1.1g/cm³ :

1. 1.2

2. 1.4

3. 1.8

4. 1.6

Which mode of expressing concentration is independent of temperature?

(a) Molality

(b) Percent by mass

(c) Mole fraction

(d) All of these

The total molarity of all the ions containing 0.1 M of CuSO₄ and o.1M of Al₂(SO₄)₃ is:

(a) 0.2M

(b) 0.7M

(c) 0.8M

(d) 1.2M

Calculate the molality of 20% CaCO₃ solution is (by mass). The density of solution is 1.2 gm/ml

1. 1.25 m

2. 2.5 m

3. 2.08 m

4. 1.5 m