What is the difference between an element, a compound and a mixture? Terms to include in your writing: pure substance, smallest unit, chemical bond, atom, types of atoms, physical separation, chemical separation.

Which of the following statements about acidic water is true? a. acid has no effect on the h, o molecules. b. the solution contains a larger number of oh ions than h, o ions. c. the solution contains a larger number of h, o ions than qh ions. d. the solution contains an equal number of h, o ions and oh ions. none of the above e.

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?

What is the name of the enzyme that forms at the start of transcription?