Good sources of beta-carotene include all of the following except
select one:
a. winter squash
b. cantaloupe
c. whole grain pasta
d. carrots

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules