七 一、选择题B.实验室用铜和浓硝酸反应制二氧化氮 又一下列说法其中完全正确的是()。.c.用氯气和熟石灰反应制漂白粉 ①元素的原子量是该元素原子的质量与’Zc原子D.用硫粉和氢氧化钠浓溶液反应制亚硫酸钠和质量的兴的比值一硫化钠一一“子12”矛““犷‘ ②质子数相同的微粒 Seven one, multiple-choice questions B. laboratory use of copper and concentrated nitric acid to produce nitrogen dioxide Another one of the following statements which is completely correct (). .c. The reaction of chlorine and hydrated lime to produce bleaching powder 1 The atomic weight of the element is the mass of the atom of the element and the ’Zc atom D. The ratio of sodium sulfite to the mass of the sulfuric acid and sodium hydroxide solution to produce a sodium sulfide-“ Sub 12” spear “” 2 ’particles with the same number of protons