Related Practice Questions :

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

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Which mode of expressing concentration is independent of temperature?

(a) Molality

(b) Percent by mass

(c) Mole fraction

(d) All of these

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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

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How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0M 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

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6.02 x 1020 molecules of urea are present in 100 mL of its solution. The concentration of the solution is

(a) 0.02 M

(b) 0.01 M

(c) 0.001 M

(d) 0.1 M

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