Chemical Formulae, Equations and Calculations

Question 1

What is an Aqueous Solution

Answer 1

This solution is formed when some substance gets dissolved in water.

Question 2

What is one mole Equal to

Answer 2

This is the amount of a substance that contains 6 x 10^23 particles

Question 3

What is the equation for the Number of Moles

Answer 3

Number of Moles = Mass in g / Molar mass

Question 4

What is the Empirical Formula

Answer 4

This shows the simplest whole number ratio of the atoms present in a compound.

Question 5

What is the Molecular Formula

Answer 5

This shows the actual number of atoms present in a molecule or formula unit of a compound.

Question 6

What is Avogadro’s Law

Answer 6

Equal volumes of gases at the same temperature and pressure contain equal number of molecules.

Question 7

What is the molar volume

Answer 7

This is the volume that can be occupied by 1 mol of any gas. This is equal to 24 dm^3 or 24000 cm^3

Question 8

What is the equation to find the volume of gas occupied

Answer 8

Volume occupied by gas = Number of moles X 24dm^3

Question 9

What is a titration

Answer 9

This is a method to determine the exact volume of one solution that will react with another solution of known volume.