百度试题 结果1 题目9 The empirical formula of compound X is CH2 and the relative molecular mass, M, of X is 70.What is the molecular formula of X?C A CH2 B C2H4 C C5H10 D CnH2n 相关知识点: 试题来源: 解析 C 反馈 收藏
Ionic compounds such as NaCl do not exist as individual molecules. Therefor no real molecular mass can be given. We can only write the simplest formula that shows the relative number of each kind of atom in a formula unit of the compound. ...
Themolecular formulafor glucose is C6H12O6, so theempirical formulais CH2O. The formula mass of glucose is 12+2(1)+16 = 30 amu. Relative Formula Mass Definition A related term you should know is relative formula mass (relative formula weight). This simply means the calculation is performed u...
to pure substance, where m is the total mass and V is the total volume. However, corresponding quantities may also be defined for a mixture as m/n and V/n, where n = ∑ i n. These quantities are called the mean molar mass and the mean i molar volume respectively.Chapter1-1 ...
(6) For molecules Mr is the relative molecular mass or molecular weight; for atoms Mr is the relative atomic mass or atomic weight and the symbol Ar may be used. Mr may also be called the relative molar mass, Mr,B = MB/M θ , where M θ = 1 g mol -1 . The standard atom...
the relationship between a gas’s relative vapour density and its relative molecular mass is defined. establishes the relationship between the volume of a gas at stp and gram molecular weight. to learn more about gay-lussac’s law and other gas laws, such as charles’ law , register ...
Including determination of molecular weight, chemical formula and structure to determine accreditation. 翻译结果2复制译文编辑译文朗读译文返回顶部 , Which includes the determination of relative molecular mass, determination and structure identification of chemical formula. ...
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Molar concentration C (mol/L) = molar number n (mol) / volume V (L) = density ρ (g/mL) / relative molecular mass M Among them, the density ρ is the density of the liquid solution, which can be obtained through experimental measurement; the relative molecular mass M is the relative...
what is the molecular formula of a compound which has an empirical formula of ch 2 and a relative molecular mass of 70? solution relative molecular mass = 70 empirical formula mass = 12 + 2 = 14 the relative molecular mass is 5 x the relative empirical formula mass the molecular formula ...