What is the total number of protons in the nucleus of an atom of potassium-42?

Real gases behave as ideal gases only when they are at Select one: a. high temperature and high pressure b. low temperature and high pressure c. high temperature and low pressure d. low temperature and low pressure

Aurelie is doing a lab in her chemistry class. Her teacher defined a calorie as the amount of energy needed to raise the temperature of one gram of water one degree Celsius.

A chemistry student needs 55.0g of dimethyl sulfoxide for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of dimethyl sulfoxide is ·1.10gcm-3.

According to the collision theory which of the following changes would increase the rate of a reaction between vinegar and sodium hydroxide

What is climate? (site 2)

The type of social bonds present in modern societies that are based on difference, interdependence, and individual rights is called:

The difference between ionic covalent and metallic bonding

As the speed of a particle increases, does its associated wavelenght increase or decrease

The composition of air by volume is approximately 1/5 oxygen, 4/5 nitrogen. When air is passed through red-hot carbon, the following reaction occurs: 2C + O2 (g) 2CO (g).

How many atomic mass units are equal to 1.672*10-24 g of protons?