What is the empirical formula for a compound that is composed of 34.85% oxygen, 13.08% hydrogen, and 52.07% carbon?

4moles of nitrogen gas are confined to a 6.0 l vessel at 177 °c and 12.0 atm. if the vessel is allowed to expand isothermally to 36.0 l, what would be the final pressure?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature