A closed container is filled with oxygen. the pressure in the container is 275 kpa. what is the pressure in millimeters of mercury?

When NaOH is added to water, the hydroxide concentration increases. What can you conclude about NaOH?

Copper will NOT easily form a new substance when in contact with which of the following? moist air nitric acid sulfuric acid carbon dioxide

The highest occupied s and p sublevels are partially filled

Calculate the energy in joules, 245 Calories = __joules C . 245 Calories

Liquid butane, C4H10, is stored in cylinders to be used as a fuel. Suppose 35.5 g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.

How can a chemical reaction be slowed down?

The atomic number of an element is always the same as ___ A. The number of electrons B. The number of protons C. The number of neutrons D. The number of protons plus neutrons

Covalent bonds are formed when electrons are

Complete the chart. (Remember to enter a "0" if necessary.) Atomic Number: 3 1s: 2s: 2p: 3s: 3p: 4s: 3d: 4p: 5s:

How many water molecules are in 2.25 mol of water?