The mole concept - Ch9

Question 1

Mole

Answer 1

One mole of a substance is the amount of that substance that contains 6x10^23 particles of that substance.

Question 2

Relative molecular mass

Answer 2

Average mass of one molecule of that compound compared with 1/12 of the mass of one atom of the carbon-12 isotope

Question 3

2g H20
Moles?
Molecules?
Atoms?

Answer 3

• 2/18 = 0,1111 moles
• 0,1111 x 6x10^23 = 6,666×10²² molecules
• 6,666x10^22 x 3 = 2×10²³ atoms