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Question

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.
  1. 45.0 g conc. HNO3
  2. 90.0 g conc. HNO3
  3. 70.0 g conc. HNO3
  4. 54.0 g conc. HNO3

A
45.0 g conc. HNO3
B
70.0 g conc. HNO3
C
54.0 g conc. HNO3
D
90.0 g conc. HNO3
Solution
Verified by Toppr

The number of moles of nitric acid can be obtained by multiplying the molarity with volume
M×V=Moles of HNO3=250×21000=0.5

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