A certain compound is 66.7% carbon, 3.74% hydrogen, and 29.6% oxygen. Find the empirical formula a. C3H2O
b. C3HO
c. CHO
d. CH2O
e. CH3O3

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.