21.7 ML of gas at 98.8 K PA is allowed to expand at constant temperature in to a 52.7 mL container

40.68kPa

Explanation:

The remaining part of the question is requesting to calculate the pressure (p2) after increase in volume.

Data;

V1 = 21.3mL

P1 = 98.8 kPa

V2 = 52.7 mL

P2 = ?

Using Boyle's law,

PV = K

P1V1 = P2V2

98.8 * 21.7 = p2 * 52.7

P2 = 2143.96 / 52.7

P2 = 40.68 kPa

Note I didn't convert the values since they all have the same unit.

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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