試題詳解

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 object and 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℃.