A balloon is filled with 10 L of air at a pressure of 1400 torr. What is the pressure of the balloon if the volume is changed to 5 L?

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it

Which item is most likely part of the safety contract