The molar mass of a substance is the mass of one mole of that substance. What is the unit of molar mass? A. g/mol B. mol/g C. L/mol D. mol/L 相关知识点: 试题来源: 解析 A。本题考查摩尔质量的单位。摩尔质量是指单位物质的量的物质所具有的质量,单位是克每摩尔(g/mol)。选项 B...
Molar mass is the mass of one mole of a substance. A mole is defined as the number of atoms in 12 grams of thecarbon-12isotope. This is always a fixed number, known as Avogadro's number. Therefore, the molar mass of a substance is the mass of Avogadro's number molecules of that s...
Molar Mass Molar mass is the mass of one mole of a substance. We determine the molar masses from values on the periodic table. Answer and Explanation: Before we can sum all of the molar mass of the elements in acetic acid we need the chemical formula of acetic acid. Acetic acid's chem...
37. What happens when one mole of ethane is mixed in the dark at room temperature with six moles of chlor ine gas? A. There is no reaction. B. Only C2Cs are formed. C. C2Cls and HCI are formed. D. CH3CH2CI and HCI are formed. 相关知识点: 试题来源: 解析 A 反馈 收藏 ...
What is the molar mass of Mg?Molar Mass:Molar mass is the weight of one mol of a substance. It typically has units of grams per mol (g/mol). Every element or chemical has a particular molar mass that is determined by the weight of each element involved....
The word molecule comes from the Latinmoleculameaning a unit of mass. This name was to encompass its original meaning of "the smallest unit of a substance that still retains the properties of that substance." In 1873, James Maxwell defined atom and molecule: "An atom is a body which cannot...
A mole of a substance contains {eq}N_a=6.022\times 10^{23} \;\rm mol^{-1} {/eq} number of constituent particles of that substance, where,...Become a member and unlock all Study Answers Try it risk-free for 30 days Try it risk-free Ask a question Our experts can answer ...
Key Takeaways: Mole in Chemistry The mole is anSI unitused to measure the amount of any substance. The abbreviation for mole is mol. One mole is exactly 6.02214076×1023particles. The "particles" could be something small, like electrons or atoms, or something large, like elephants or stars....
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What is the energy state of one mole of methane at room temperature (in kcal)?Molar enthalpy of formation:The molar enthalpy of formation determines the amount of energy needed to form one mole of a substance or element. It is the same as the bond enthalpies of individual el...