Achemical company makes up batches of copper sulfate solution by adding 250 kg of copper sulfate powder to 1000 liters of water. a laboratory chemist wants to make a solution of identical concentration, but only needs 350 ml (0.35 liters) of solution. how much copper sulfate powder should the chemist add to the water?

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.