Define or explain the term: Mole - Chemistry

Define or explain the term:

Mole

Definition

Mole is the amount of a substance containing elementary particles like atoms, molecules or ions in 12 g of carbon - 12.

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Chapter 5 Mole concept and Stoichiometry
Exercise 5B | Q 2.7 | Page 83

Calculate the molar mass of the following substance:

Sulphur molecule, S₈

The percentage composition of a gas is Nitrogen 82.35%, Hydrogen 17.64%. Find the empirical formula of the gas. [N = 14, H = 1]

What name is given to the amount of substance containing 6.022 × 10²³ particles(atoms,molecules or ions) of a substance ?

How many moles are 3.6 g of water ?

How many moles of oxygen atoms are present in one mole of the following compounds ?

If 0.2 mol of the following substance is required how many grams of that substance should be taken?

Sodium chloride

Two oxides of a metal (M) have 20.12% and 11.19% oxygen. The formula of the first oxide is MO. Determine the formula of the second oxide.

Find the number of moles in 10 g of CaCO₃.

Calculate the number of atoms in the following:

52 amu of He

The visible universe is estimated to contain 10²² stars. How many moles of stars are present in the visible universe?