mole - amu and g/mol relation - Chemistry Stack Exchange
In other words, at the atomic level, the appropriate unit for amount-specific mass ("molar" mass) is dalton per entity--and, because of the mole definition as an Avogadro number of entities, dalton per entity is exactly equal to the macroscopic units gram per mole or kilogram per kilomole.
Which is a better unit for expressing molar mass, amu or ... - Socratic
2014年9月25日 · While the numeric values are the same the units convey different information. The term amu refers to the atomic mass unit which is the value of a proton and the value of a neutron in regards to a mass comparison to the standard that carbon - 12 has 6 protons and 6 neutrons. When the designation for the the mass is (grams)/(mol) the unit refers to the fact that …
What is the difference between molar mass and atomic mass?
2017年8月9日 · Molar mass is the mass of one mole of a substance. Atomic mass is the mass of one individual unit of a substance. An important concept regarding the mole is that the atomic mass in "amu" of a substance is numerically equivalent to the mass in "g" of one mole of that substance. To illustrate this fact, let's look at the compound sodium chloride ("NaCl"). The …
Why does 1 amu = 1 g/mol? - Socratic
2018年3月26日 · Due to the definitions... The mole is defined as the number of particles in 12 \\ "g" of carbon-12, known as ""^12C. So, we say that in one mole of carbon-12, the sample has a mass of 12 \\ "g". In other words, "mass of carbon-12"=12 \\ "g/mol". Still with me? Good. Now, we also know that the mass of a single carbon-12 atom is exactly 12 \\ "amu", as it is an isotope. …
What is the difference between "molecular mass", "average atomic …
2015年9月29日 · The term molar mass refers to the mass per mole of substance - the name kind of implies this. This substance can be anything - an element like $\ce{O}$, or a molecule like $\ce{O2}$. The molar mass has units of $\mathrm{g~mol^{-1}}$, but numerically it …
What is the difference between atomic mass and molar mass?
2015年12月4日 · See explanation. Atomic mass is the mass of an atom and is given in a.m.u. (atomic mass unit). However, a molar mass is the mass of one mole atoms or molecules and is given in grams. one mole is equal to Avogadro's number (N_A=6.022xx10^23) atoms or molecules. For example: Sodium atom has a mass of 23 a.m.u. however, the molar mass of …
What is the difference between molar mass and molecular mass?
2016年5月25日 · Discussed below The molecular mass is a relative mass of a molecule of a substance ( a compound or an element )measured by the ratio of the mass of one molecule of the substance to the mass of 1/12th part of ""_6^12C atom. It is a unitless quantity,being the ratio of two masses. The tiny constant mass of 1/12th part of the mass of "_6^12C atom is also …
physical chemistry - Where does the molar mass difference …
2014年12月5日 · The differences in molecular mass stem from two sources: Nuclear binding energy. The definition of the atomic mass unit and Avogadro's number (and thus the g/mol), is the mass of one atom of the carbon-12 isotope $\ce{^{12}_6 C}$. 1 amu = $\frac{1}{12}$ the mass of one atom of $\ce{^{12}_6 C}$ and the g/mol unit is based on the definition of Avogadro's …
atoms - Are atomic mass unit (amu), unified mass unit (u) and …
2020年7月6日 · Chemists choose to define the amu as 1/16 of the average mass of an oxygen atom as found in nature; that is, the average of the masses of the known isotopes, weighted by their natural abundance. Physicists, on the other hand, defined it as 1/16 of the mass of an atom of the isotope oxygen-16 ($\ce{^{16}O}$). $^1$ unified atomic mass unit(u)
Why is weight of 1 mole of substance equal to atomic/molecular …
Ratio of the mass of a molecule to the unified atomic mass unit. Sometimes called the molecular weight or relative molar mass. relative molar mass Molar mass divided by $1~\text{g/ mol} (the latter is sometimes called the standard molar mass).