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...
What is the molar mass of acetic acid?Molar MassMolar 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 ...
In order to understand molality, it is necessary to understand the mole, a fundamental chemical unit. One mole of a substance is defined as containing the same number of units as the number of atoms in 12 grams (g) of the elementcarbon-12. This very high number is known asAvogadro's N...
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 ...
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,... Learn more about this topic: Moles to Atoms | Formula, Calculation & Avogadro's Number ...
In the March-April 2009 issue of Chemistry International , Ian Mills and Martin Milton reviewed concepts familiar to chemists: the quantity amount of substance and its unit, the mole. They also presented a possible new definition for the mole. The reasoning behind the possible new definition is...
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...
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....
A mole of a substance is defined as a specific number of atoms or molecules called the "Avogadro number," which is 6.022 × 1023. The number is derived from international agreement, based on the number of atoms in exactly 12 grams (g) of the carbon isotope "C-12." The convenience this...