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What volume of NH(3) gas at STP would be...

What volume of `NH_(3)` gas at STP would be needed to prepare 100 ml of 2.5 molal (2.5 m) ammonium hydroxide solution?

A

0.056 litres

B

0.56 litres

C

5.6 litres

D

11.2 litres

Text Solution

Verified by Experts

The correct Answer is:
C
2.5 molal `NH_(4)OH` means 2.5 moles of `NH_(3)` in 1000 g `H_(2)O` (1000 cc of solution)
Hence, 100 cc solution of `NH_(3)` requires `=0.25` mole
`=0.25xx22.4 L=5.6 L`
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