Why do materials change size when they change temperature

What is the total number of occupied principal energy levels in a neutral atom of neon in the ground state?

The theoretical yield of a reaction was calculated to be 9.23 grams. The actual yield during the reaction was 7.89 grams. Calculate that percent yield for this reaction. You must show all of your work to receive credit.

If a gas's [kelvin] temperature doubles and it's volume then remains the same, then what happens to it's pressure?

Under which condition is competition among fish most likely? A when there are fewer fish in the habitat B when amount of available plankton is greatly reduced C when there is adequate oxygen dissolved in the water D when there is abundant rainfall

What is the molecular description of diffusion? the transfer of energy between the moving molecules the constant, organized molecular movement from lower concentration to higher concentration the random molecular movement from higher concentration

Ammonia (NH3) is one of the most common chemicals produced in the united states. it is used to make fertilizer and other products. Ammonia is produced by the following chemical reaction. N2 (g) + 3h2 (g) = 2nh3 (g) If you have 1.00 x 10^3g of N2 a.

How many grams of O2 are in 5.0 moles of the oxygen gas?

How many of the following compounds are soluble in water? Cu (OH) 2

Mg is a member of which family? a) noble gases b) halogensc) alkaline earth metals d) alkali metalse) none of the above

How does an atom differ from a molecule?