C.4 EOY

Question 1

What is Ar

Answer 1

• Relative Atomic Mass
• Mean Mass of an element taking into account the abundance of isotopes

Question 2

What is Ar relative to

Answer 2

Carbon -12

Question 3

How is Ar calculated

Answer 3

Total mass of atoms/ total number of atoms

Question 4

What is Mr

Answer 4

• Relative Formula Mass
• Total number of the Atomic Masses

Question 5

What is a mole

Answer 5

• Relative atomic mass in grams
  - 12g or carbon = 1 mol of carbon

Question 6

How many atoms does a mole contain?

Answer 6

• A mole contains the same amount of atoms
• 6.02 × 10^23

Question 7

How to calculate mol

Answer 7

• Mass = Mr Mol
• Mr Mole lives under the mole

Question 8

What is a balanced equation

Answer 8

• Balanced equation is when you have the same number of molecules on eachside
• H2+ Cl2 — 2HCl

Question 9

What can balanced equation be used for

Answer 9

To find the masses of reactants and products