Question

A beaker of 50 mL of a liquid is placed in room temperature. 20% of the remaining liquid

evaporates after every hour. How much liquid would be left in the container after 6 hours

Answer 1

Explanation:

After the first hour, 20% of the liquid evaporates, which leaves 80% of the liquid remaining in the beaker.

The amount of liquid remaining after the first hour is:

50 mL x 0.8 = 40 mL

After the second hour, another 20% of the remaining liquid evaporates, which leaves 80% of the remaining 40 mL: 40 mL x 0.8 = 32 mL

We can repeat this process for each of the remaining 4 hours:32 mL x 0.8 = 25.6 mL

25.6 mL x 0.8 = 20.48 mL

20.48 mL x 0.8 = 16.384 mL

16.384 mL x 0.8 = 13.1072 mL

Therefore, after 6 hours, approximately 13.1072 mL of liquid would be left in the container.