100分求一道物理题 If the mass of a hydrogen atom is 1.67*10^-27kg and the mass of an electron is 9.1*10^-31kg,how many electrons would be required to have a mass equivalent to one hydrogen atom?

100分求一道物理题 If the mass of a hydrogen atom is 1.67*10^-27kg and the mass of an electron is 9.1*10^-31kg,how many electrons would be required to have a mass equivalent to one hydrogen atom? 100分求一道物理题,If aluminum (Al),with an atomic weight of 27,combines with oxygen (O),with an atomic weight 16,to form the compound aluminum oxide (Al2O3),how much oxygen would be required to react completely with 52g of aluminum 求一道物理题 一道物理题,求思路 求问一道物理题 一道物理题,求思路 求一道物理题详解? 求解决一道物理题 求一道物理题、、、、初三 一道物理题,求理由! 一道物理题,求原因! 一道物理题求详解 求一道物理题 一道物理题求详解 200分求一道物理题 懂英文的神人 If sodium (Na),with an atomic weight of 23,combines with oxygen (O),with an atomic weight of 16,to from the compound Na2O,what is the ratio of the mass of sodium to oxygen that you would expect to react com 一道物理题!求大神进 物理题一道,求画图方法 问一道物理题,求高手