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How many grams of concentrated nitric ac...

How many grams of concentrated nitric acid soluton should be used to prepare 250mL of `2.0M HNO_3`? The concentrated acid is 70% `HNO_3`.

A

90.0g conc. `HNO_3`

B

70.0 g conc.`HNO_3`

C

54.0 g conc. `HNO_3`

D

45.0 g conc. `HNO_3`

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