The atomic mass of 14N is 14.003 amu. The atomic mass of 15N is 15.000 amu. What is the average atomic mass of nitrogen?

A snowflake contains 2.0 1018 molecules of water. How many moles of water does it contain? mol

The particles of a gas are actually - electrons or protons protons or neutrons atoms or elements atoms or molecules

In an oxygen molecule, the two oxygen atoms are held together by a double bond with a bond energy of 495 kJ/mol. Using the balanced chemical equation (shown above), how much energy must be expended in breaking the O=O bonds?

A synthetically-produced narcotic medication, drug, or agent similar to the opiate morphine, but not derived from opium; used to relieve pain

Why did the plates began to slip against each other 30 million years ago forming San Andreas fault

Convert 4.992*1010 g to each of the following units. B. Mg c. mg D. metric tons

The ideal gas law shows us how a gas will behave under many conditions. The formula is: P V = n R T Where P = pressure, V = volume, n = amount of the substance, R = ideal gas constant, and T = temperature.

The Suns ultraviolent Rays can cause skin damage including sunburn and even skin

Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for.

A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L. If the temperature changes to 70 ∘C, and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?