Explanation

• 6.02 × 10²³ is Avogadro's number, which represents one mole of particles.
• One mole of water contains 6.02 × 10²³ water molecules and has a mass of approximately 18 grams.

Last verified on 01-11-2026

Explanation

• One gram molecular mass means molecular mass expressed in grams.
• One mole of water H2O has mass 18 grams, equal to its molecular mass in grams.
• One mole of water contains 6.022 x 10^23 molecules.

Last verified on 01-11-2026

Explanation

• An empirical formula represents the simplest whole-number ratio of atoms of each element in a compound.
• For example, the molecular formula of glucose is C₆H₁₂O₆, while its empirical formula is CH₂O.

Additional information:

• The molecular formula shows the actual number of atoms in a molecule.
• Empirical formula shows their simplest ratio.

Last verified on 01-11-2026

Explanation

• The Law of Mass Action was proposed by Guldberg and Waage in 1864.
• It states that the reaction rate is proportional to the product of the active concentrations of the reactants, each raised to a power specified by the reaction equation.
• For an elementary reaction, the rate expression follows directly from the stoichiometric coefficients.

Last verified on 01-11-2026

Explanation

• Active mass refers to the effective concentration of a substance taking part in a chemical reaction.
• It is commonly expressed in moles per cubic decimetre (mol/dm³).
• Active mass is used in the law of mass action to express the relationship between reactant and product concentrations.

Last verified on 01-11-2026