Define the terms chemistry and matter.

Which of the following describes the distribution of sodium and potassium between cells and body fluids?

An element that is liquid at room temperature but gas at 100 degrees

Explain why ALL organisms need a source of food.

Suppose you have 100 kg of fresh strawberries what would be the approximate mass of strawberries after you freeze dry them

Balance the half-reaction in acidic or basic solution then state whether the process is oxidation or reduction. b) CLO4^-1 - > Cl2 c) FeO - > Fe2O3 d) NO3^-1 - > N2O4

What determines the horizontal arrangement of the periodic table?

A 55.3 g sample of lead heated and then quenched in a 175g sample of water. During the quenching reaction the temperature of the water increases from room temperature, 25.0 °C, to 42.6 °C.

What conclusion can you draw from this experiment about the components of the black ink

How does the size of ions affect the conductivity of a solution?

How to write complete ionic and net ionic equations?