Why is relative atomic mass equal to molar mass?
Why is relative atomic mass equal to molar mass?
Because the definitions of both the mole and the atomic mass unit are based on the same reference substance, 12C, the molar mass of any substance is numerically equivalent to its atomic or formula weight in amu. Per the amu definition, a single 12C atom weighs 12 amu (its atomic mass is 12 amu).
What is the formula for relative formula mass?
The relative molecular mass/relative formula mass is defined as the sum of all the individual atomic masses of ALL the atoms in the formula (Mr). e.g. for ionic compounds e.g. NaCl = 23 + 35.5 58.5) or molecular mass for covalent elements or compounds …
Is ram the same as molar mass?
Both R.A.M. and R.M.M are unitless since they are the ratio of two physical quantities which have the units of mass. My Question: Atomic masses and molecular masses expressed in a.m.u or u have the same numerical value as R.A.M. and R.M.M respectively.
What is the difference between mass number and relative atomic mass?
Atomic mass is also known as atomic weight. Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element’s isotopes. The mass number is a count of the total number of protons and neutrons in an atom’s nucleus.
How do you calculate RAM and RMM?
It is often shortened to RMM. The RMM is used in many sorts of calculations in chemistry, and so you must be able to calculate it to answer all the other calculations you might meet….Calculating the Relative Molecular Mass (RMM) of Compounds.
| Relative Atomic Masses | ||
|---|---|---|
| Element | Symbol | RAM |
| Carbon | C | 12 |
| Hydrogen | H | 1 |
| Oxygen | O | 16 |
What is the mole of CH4?
For example the atomic mass of methane (CH4)is 12 amu for the carbon plus 4 x 1 amu for the four hydrogens, for a total of 16 amu. Therefore the molar mass of methane is 16g. We say that one mole of methane has a mass of 16 g, and that there are 6.022 x 1023 atoms in that mass of methane.