Which biological molecule is in the shape of a double helix?

A. Enzyme

B. Deoxyribonucleic acid (DNA)

C. Amino acid

D. Ribonucleic acid (RNA)

Why is the melting of ice a physical change?

If you have a big difference in temperatures, but it's raining rather than snowing, what conditions must exist?

Which is the correct name for P2O5

Which statement best describes a limitation of the kinetic-molecular theory for a gas?

You have prepared a saturated solution of x at 20∘c using 39.0 g of water. how much more solute can be dissolved if the temperature is increased to 30∘c? express your answer with the appropriate units.

How many metaloides are found on the periodic table

Which of the following is considered to be a chemical property of matter?

How does percent composition by mass contribute to writing a balanced equation?

Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the a) activation energy b) number of collisions c) fraction of the reacting particles which possess energies greater than the activation energy

If you have 60 grams of MgCl2 in 5 liters of solution, what is the molarity of this solution?