120g of Chromium-48 decays. After 6 half-lives, how much of the original nuclei would remain?

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

__can be defined as which velocity changes

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?