Certain species of atoms of different elements having identical relative masses are called

The number of moles of oxygen in 1 L of air containing 21 % oxygen by volume, under standard conditions, is

Law of constant composition was proposed by

The number of moles of KMnO₄ that will be needed to react with one mole of sulphite ion in acidic solution is

Which law says that the matter is composed of discrete particles which do not break up during a chemical change?

The species of an atom which possess different relative masses are called

In the final answer of the expression
the number of significant figures is

Which law states that, when two elements combine to form two or more compounds, then the different masses of one element, which combine with a fixed mass of the other element, bear a simple whole number ratio with one another ?

The maximum number of molecules are present in