If the pressure on an ideal gas is increased, what will happen to the volume of the gas?
a. it will increase.
b. it will decrease.
c. it will stay the same.
d. what happens will depend on exactly what gas it is.

B). it will decrease. 

But, you should keep the temperature constant, 'cause according to Boyle's law, pressure of the ideal gases is indirectly proportional to it's volume but at constant temperature. So, don't confuse in that.

Hope this helps!

4. 50x10= 500m/s 5. 52m/s