Question

whats the final volume of a gas with an initial volume of 75 mL if the pressure decreases from 300 mL to 200mL

Answer 1

300 ml ... 200 ml
75 ml ... x = ?

If you would like to know what is the final volume of a gas, you can calculate this using the following steps:

300 * x = 200 * 75 /300
x = 200 * 75 / 300
x = 50 ml

The correct result would be 50 ml.