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Olenka [21]
3 years ago
13

20. What will be the concentration, in mol dm, of the resulting solution when 200 cm' of

Chemistry
1 answer:
My name is Ann [436]3 years ago
3 0

Answer:

0.140mol/dm^3.

Explanation:

200cm3 = 0.2dm^3.

0.2dm^3 * 0.200mol/dm^3 = 0.040mol

300cm^3 = 0.3dm^3

0.3dm^3 * 0.100mol/dm^3 = 0.030mol

The number of moles is 0.070mol of HCl (aq).

The volume of the solution is 0.5dm^3.

Hence the concentration is 0.140mol/dm^3.

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