PLEASE PLEASE PLEAS I NEED HELP!
if the half-life of substance z is 2.5 years, how long would it take dor 48 grams of substance z to decay such that only 3 grams remain?
if you are willing i need help on more questions and ill give you brainliest if you do!!

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

56.16 gregor mendel was the first scientist to use statistics to analyze scientific data. before mendel's experiments, scientists believed that organisms acquired traits from their environment and passed them on to their offspring. after mendel's discoveries were accepted, scientists realized that traits passed to offspring were the result of genes being passed from parents to offspring. this is an example of pls

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom