Question

1. Which of the following concentration factors is affected by change in temperature?
a. Molarity
b. Molality
c Mole fraction
d. Weight fraction
2. 6.02x10- molecules of urea are present in 100 mL of its solution. The
concentration of urea solution is (N = 6.02 x10 mor")
(AEEE 2004)
a. 0001 M
& Q.01 M
c. 0.02
d 0.10 M​

Answer 1

Answer:

1. A

Explanation:

Molarity is dependent on temperature, whereas molality is not.

2. number of moles of urea = molecules of urea present/ avagadro number

=6.02x10^20/6.02x10^23

=10^-3 moles

concentration = number of moles / volume of solution

=10^-3/(100x10^-3)(since it in ml)

=10^-2

therefore the final answer

concentration is 10^-2M (molarity)

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