A 4.190 g sample of an oxide of chromium contains 2.179g of chromium, what is its empirical formula? a. CrO2
b. Cr2O
c. CrO3
d. Cr2O3

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

What is the maximum amount of al2(so4)3 which could be formed from 15.84 g of al and 12.89 g of cuso4?