Moles

Question 1

what is a mole

Answer 1

The MOLE (mol) is a unit of measurement that is the amount of a pure substance containing the same number of chemical units

Question 2

what is molar mass

Answer 2

molar mass is the mass of one mole of a substance, or the number of grams per mole of a compound.

Question 3

How do we calculate molar mass

Answer 3

Multiply the atomic mass (from the periodic table) of each element by the number of atoms of that element present in the compound

Question 4

examples

Answer 4

Sulfur (S8)
The average atomic mass of sulfur is 32.07, so multiplying that by 8 gives a molar mass of 256.56 g/mo

Question 5

To find moles

Answer 5

mass/ molar mass
eg find molar mass of 16g of oxygen gas
16/16 x 2
= 16/32 + 0.5