Is evaporation of water a physical change or a chemical change? explain your answer?

A gas has experienced a small increase in volume but has maintained the same pressure and number of moles. According to the ideal gas law, how has the temperature of the gas changed?

If an atom of sodium had an atomic number of 11, and lost and electron, what would you have?

Describe a main goal of primary treatment in a modern sewage treatment plant.

What does berkelium react with

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

Relate How do atoms relate to cells?

Rank the following compounds in terms of decreasing vapor pressure. Cl-CH2CH2OH CH3-O-CH3 CH3CH2OH CH3OH

A specific steroid has a λmax of 282 nm and a molar absorptivity ε of 11, 500 L mol - 1 cm - 1. What is the concentration of the compound in a solution whose absorbance at 282 nm is A = 0.060 with a sample pathlength of 1.00 cm?

The chemical formula for a covalently bonded group of atoms is called a

What is the molar mass, in grams, of a mole of an element equal to?