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What is the concentration in moles dm^-3 of the following:?

240 cm^3 of NH3 (g) dissolved in 1000 cm^3 of solution.

Answers (3)

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osscvxpqaa profile image

If you are working at room temperature,

1 mol NH3 has volume = 24,000cm³

Therefore you have 240/24000 = 0.01 mol NH3 dissolved in 1dm³ solution

Concentration: 0.01mol/dm³

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Since the amount of NH3 is given in volume (mL), you need to know the density of NH3 to convert volume to grams.