Chemists use “moles,” derived from the German word for molecule, as one way of describing the quantity of a chemical compound. Whereas units such as grams or pounds describe the mass of a chemical, moles describe the number of particles — either atoms or molecules — of that compound.

## Why do equal amounts in moles of different elements and compounds have different masses even though they have the same number of particles?

The reason why the same number of atoms of each element will give its atomic mass in grams (or any other unit of measure of mass) is that for atoms all you essentially are weighing are their protons and neutrons; and since these are supposedly the same things in all elements, and since they supposedly weigh the same as …

## Is Mol and moles the same?

The mole (symbol: mol) is the unit of measurement for amount of substance in the International System of Units (SI). It is defined as exactly 6.u00d71023 particles, which may be atoms, molecules, ions, or electrons….Mole (unit)

mole
1 mol in … … is equal to …
SI base units 1000 mmol

## Why do different compounds have different molar masses?

The mass in grams of one mole of substance is called molar mass. Each element has its own unique molar mass. To see why these elements have different molar masses, we need to remember that the atoms of different elements contain different numbers of protons, neutrons, and electrons, so they have different masses.

## What is the sum of the atomic masses of all the atoms in a formula for a compound?

The formula mass of a substance is the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units. The formula mass of a covalent compound is also called the molecular mass.

## How will you prepare 0.1 N HCl?

37 ml of solute/100 ml of solution. Therefore add 8.3 ml of 37% HCL to 1 liter of D5W or NS to create a 0.1N HCL solution.