240 cm^3 of NH3 (g) dissolved in 1000 cm^3 of solution.
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Answers (3)
1000 cm^3 = 1 dm^3.
1 mole of any gas occupies 22.4 dm^3 at STP.
0.24 dm^3 / 22.4 mol dm^-3 =0.01 mol.
= 0.01 moldm^-3 NH3.
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
Since the amount of NH3 is given in volume (mL), you need to know the density of NH3 to convert volume to grams.