The percent composition by mass of an unknown compound with a molecular mass of 90.078 u is 40.002% C, 6.7135% H, and 53.284% O. Determine the compound's empirical and molecular formulas.

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d