The mass of 0.02mol of a substance is 0.88g1.what is the molar mass of this substance?2.what is its chemical formula?

The mass of 0.02mol of a substance is 0.88g1.what is the molar mass of this substance?2.what is its chemical formula? the mass of 与 a mass of 有啥区别? mass的用法the mass of 和 a mass of 有什么区别？ the empirical forumla of a compound is no2,its molecular mass is 92g/mol.what is its molecular formula? 英文翻译as the mass of air rises THE MASS the mass the empirical forumla of a compound is no2,its molecular mass is 92g/mol.what is its molecular formula?help me do this! The elements of a compound occur in a fixed mass ratio.请问fixed mass ratio 托福里的 the properties of mass怎么翻译 在mass media相关的讨论中,public,mass,和popular 的概念的各自侧重点是什么?Please describe the difference emphasis of the concept of the public,mass,and popular,in relation to the discussion of the mass media. 尽量“人性化”一点!0.4 of the mass of Mark is the same as 0.3 that of Mathew.What is the ratio of the mass of Mark to total mass? 英语翻译(a) show an understanding that all physical quantities consist of a numerical magnitude and a unit.(b) recall the following base quantities and their units:mass (kg),length (m),time (s),current (A),temperature (K),amount of substance (mol the gram-equivalent mass of alcl3 is its gram-formula mass divided bya.1b.3c.4d.6 The atomic mass of copper is 63.55 amu.There are onlytwo isotopes of copper,63Cu with a mass of 62.93 amu and65Cu with a mass of 64.93 amu.What is the percentageabundance of each of these two isotopes? The club women gathered____clothes for people in the tsunami-hit countriesA a mass of B mass of C a large amount of D amount of 为什么选A the mass 什么意思? 翻译“the mass-era ”