mass = moles × molar mass C. molar mass = moles × mass D. moles = mass + molar mass 相关知识点: 试题来源: 解析 B。本题考查物质的量、质量和摩尔质量的关系。物质的量等于质量除以摩尔质量,即 mass = moles × molar mass。选项 A、C、D 关系错误。反馈 收藏 ...
英国课程体系对于物质的量的要求 在IGCSE 阶段,课程的要求是能够通过摩尔质量(molarmass)这一桥梁,计算质量与物质的量的关系;通过常温常压(RTP)的气体摩尔体积,计算气体体积与物质的量的关系;通过物质的量浓度的定义,求解溶液浓度和溶质的物质的量的关系。稍微难一点的要求就是要通过配平反应方程式中物质的系数之比进...
英文:Molar mass is the mass of one mole of a substance, expressed in grams. 英文同义表达: 第一条:molecular quantity / amount of substance 说明/解释:这两个短语也用于描述化学中物质的量,尤其是在描述化学反应时。 第二条:gram-molecular weight / gram-molecule 说...
【解析】mole,中文就是摩尔,是物质的量的单位,一摩尔代表6 02*10^(23) , (6.02*10^(23) 是12g碳12中所含的碳原子的个数)mole mass(摩尔质量),就是1mol物质的质量,单位就是克(比如氯化镁的摩尔质量就是 6.02*10^(23)个氯化镁分子的质量)摩尔质量在数值上就等于分子量(或原子量),只不过后者没有单位...
mole mass(摩尔质量),就是1mol物质的质量,单位就是克(比如氯化镁的摩尔质量就是6.02*10^23个氯化镁分子的质量)摩尔质量在数值上就等于分子量(或原子量),只不过后者没有单位)这样,MgCl2的摩尔质量就是24+35.5*2=95克mol和克的单位是不同的,题目的意思是让你计算2.15 mol MgCl2的质量,那就是95*2.15克第二...
ap chemistry moles, molar mass, and molarity apchemistry class___ name assessmenttest partimul ti pl choice answer followingquestions. you may use periodictable provided eachquestion, write your answers boxesbelow. 1011 12 13 14 15 howmany milliliters neutralize50.0 ml 25.0ml 30.0ml 20.0ml ...
page 33). The formula of an ionic compound is determined by the charges on each of the ions present. The number of positive charges is balanced by the number of negative charges so that the total charge on the compound is zero. We can work out the formula for a compound if we know...
menu11TheMole:Numbervs.MassOnemoleof:NumberofparticlesMolarMassCCF4Al(OH)3N2O5CuFe2O3SiO26.02x1023atoms12.011g6.02x1O23molecules88.01g6.02x1023unitcells78.00g6.02x1023molecules108.011g6.02x1023atoms63.546g6.02x1023unitcells159 君,已阅读到文档的结尾了呢~~...
Question: Three moles of helium gas (molar mass M=4.00 g/mol) are in a rigid container that keeps the volume of the gas constant.Initially the rms speed of the gas atoms is 800m/s. Give your answers to 3 significant figure...
We can use the molar gas volume of 24.0 dm3 at r.t.p. to find: ■ the volume of a given mass or number of moles of gas ■ the mass or number of moles of a given volume of gas. worked examples 22Calculate the volume of 0.40 mol of nitrogen at r.t.p. ...