3. Which of the following statements about analytical calculations is (are) correct?(AB) Mass is a variant measure of the quantity of matter in an object, while weight is the force of attraction between an objectand its sur undings, principally the carth.(AC) The molar mass of a substance is the mass in amu of I mole of that substance.(AD) The molar analytical concentration of a solution gives the total number of millimoles in 1 mL of the solution.(AE) The prefix giga- for units is abbreviated as G and represents the multiplier of

.(BC) The pH is a p-function and is the negative logarithm of [H+].(BD) The specific gravity is the ratio of the mass of a substance to the mass of an equal volume of water at 0℃.