RFM and molar volumes

Question 1

What is Avagadro’s number?

Answer 1

6.02 ×10^23

Question 2

What is relative formula mass (Mr)?

Answer 2

The sum of the relative atomic masses of the atoms it contains.

Question 3

Formula for finding the number of moles in a given

mass?

Answer 3

Number of moles = Mass in g / Mr

Question 4

Molar volume of a gas at rtp?

Answer 4

24 dm^3, or 24 000 cm^3

Question 5

Formula for calculating volume of a gas?

Answer 5

Volume = moles of gas x 24

Question 6

Formula for calculating concentration?

Answer 6

Concentration = number of moles x volume

Question 7

Formula for converting moles per dm^3 to grams per

dm^3

Answer 7

Mass in grams = moles x relative formula mass

Question 8

What is empirical formula?

Answer 8

The simplest formula that tells you the ratio of atoms of each element in a single molecule

Question 9

What is molecular formula?

Answer 9

Tells you the actual number of atoms of each element in a single molecule

Question 10

Formula to calculate percentage yield?

Answer 10

% yield = actual yield (g) / theoretical yield (g) x 100