Question

The original gas volume in a balloon is 50.mL when the pressure is 1.00 atm. Predict the new gas volume when the pressure is 3 times higher
-Brother needed help not sure how to help him chem to much

Answer 1

According to Boyle's law, Volume is indirectly proportional to the pressure.

So, P1V1 = P2V2

Substitute the known values, 
1 * 50 = 3 * V2

V2 = 50/3 = 16.67 mL

In short, Your Answer would be: 16.67 mL

Hope this helps!