Which type of ion usually undergoes reduction? No ion

All ions

Anion

Cation

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm

Ajar contains a certain substance. which observation would show that the substance must be either a solid or a liquid?