Which is the best example of a closed system

Why do molecules of oxygen have to have an even number of atoms?

15.35 L of gas is at a pressure of 198.0 kpa. At what pressure would the gas have a volume of 13.78

In a single replacement reaction part of ionic compound is removed and replaced by a new element. What element will fluorine replace in lithium bromide?

An oxygen o2 molecule is adsorbed on a patch of surface (see sketch at right). this patch is known to contain 484 adsorption sites. the o2 molecule has enough energy to move from site to site, so it could be on any one of them.

What part of an atom has most of its mass

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?

How does chemical change affect the composition of matter

When the equation Fe+S - -> Fe2S3 is balanced, what is the coefficient for sulfur?

Where is the energy in a glucose molecule stored