How many parts per million of lead is found in 250 ml of water if there is 1.30g of lead in the water? 1ml=1g

What is the relation between concentration of reactants and the rate of chemical reaction?

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule

Name atleast 3 type of energy associated with the microwave