Relative formula mass and moles

Question 1

Relative atomic mass

Answer 1

The mass number (bigger number) found on the periodic table is the same as the relative atomic mass of that element

Question 2

Relative formula mass

Answer 2

Adding up all the relative atomic masses in a compound

Question 3

Law of conservation of mass

Answer 3

It states that atoms cannot be made or lost in a chemical reaction

Question 4

What is a mole

Answer 4

A mole of anything always contains the same number of atoms, molecules or ions. A mole is the relative atomic mass in grams

Question 5

What is Avogadro’s number

Answer 5

6.02 x 10^23

Question 6

Why are moles useful

Answer 6

Atoms are too small to weigh out individually but we can weigh out a mole of something. Because a mole of something always has the same number of atoms or molecules in it, we can weigh out equal numbers of different substances.

Question 7

Moles formula

Answer 7

Moles=Mass/RFM