23. True or false? Atoms that have the same number

of neutrons but different numbers of protons are

called isotopos.

A gas is contained in a cylinder with a volume of 4.4 L at a temperature of 48.2oC and a pressure of 605.1 torr. The gas is then compressed to a volume of 0.38 L, and the temperature is raised to 586.6oC. The new pressure of the gas will b

Why do gases take up so much space?

What happens to the chemical energy in fireworks as they explode

Which statements describe phase changes? Check all that apply. Particles in a liquid need to move more slowly in order to freeze. Attractive forces overcome the motion of particles when a solid sublimes.

5. If 1 g of a gas occupies a volume of 300 mL at STP, what is the molecular weight of the gas?

What prompted rutherford to do the alpha particle scattering experiment?

How many moles of hydrogen would be required to produce 5.0 mol of water?

What is the biggest difference between an exothermic and endothermic process? A. The direction of energy flow. B. The amount of energy transferred. C. The type of energy being transferred. D. The speed with which energy is transferred.

The mass of 1 mol of chromium (atomic mass 51.996 amu) is

Which of the following elements will tend to form a cation? A. Oxygen B. Nitrogen C. Sulfur D. Lead E. All of the Above