The NaNO 3 weighed out to make 50 mL of an aqueous solution containing 70 . 0 mg Na + per mL is_ g . (Rounded off to the nearest integer) [Given : Atomic weight in gmol - 1 - Na : 23 ; N : 14 ; O : 16

Question

The NaNO 3 weighed out to make 50 mL of an aqueous solution containing 70 . 0 mg Na + per mL is_ g . (Rounded off to the nearest integer) [Given : Atomic weight in gmol - 1 - Na : 23 ; N : 14 ; O : 16 ]

TestHub · Accepted Answer

Na + present in 50 ml = 70 mg 1 ml × 50 ml = 3500 mg = 3 . 5 gm moles of Na + = 3 . 5 23 = moles of NaNO 3 weight of NaNO 3 = 3 . 5 23 × 85 = 12 . 993 gm = 13 gm

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