I really need help, please. If a 50 mL sample from a water source contained .0000045 grams of copper, how many ppm would it contain?

How many grams of Copper (II) sulfate, or CuSO4 must be added to 245 mL of water to make a 1.00 M solution? The molar mass of CuSO4 is 159.6 g/mol.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

1.75 is the weight of one medium egg

Answer ozone (o3) is made of three atoms of oxygen, it is a molecule;