Outcome 1- Mole

Question 1

How to Calculate the: Mole

Answer 1

n=m(g)
—
M

Question 2

How to Calculate the: No. of Particles

Answer 2

Number of Mole x Avagrados number

Question 3

How to Calculate the: Molar mass

Answer 3

add atomic mass of atoms

Unit of mole is gmol-1

Question 4

How to Calculate the: Empirical Formula

Answer 4

Grams divided by atomic mass,
New number divided smallest number
added to the molecular formula

Question 5

How to Calculate the: Molecular Formula

Answer 5

same process as molecular formula
divide Mr by the total mass number of all elements
times the e.f by the new number eg 2

Question 6

How to Calculate the: Relative Atomic Mass

Answer 6

(RIM x Abudance) +…. divided by 100

is rim is 34.969 and 36.966. if the ram is 35.45 the adbundance is

35.45= (34.969x X) + (36.966 x (100- X) )
————————————————–
100 (x 100 to get rid of 100)
= 3545= 34.969 X+ 3696.6 - 36.966X
= 3545- 3696.6 (-151.6), 34.969X- 36.966X

 = -151.6

    - -------    = 75.91 %
    - 1.997

Question 7

How to Calculate the: Percentage Composition

Answer 7

• Find the molar mass, making sure to include the water present in the formula = 249.6 g mol-1
• Calculate the mass of water= 90gmol-1
• Calculate the percentage mass of water = 90 divided by 249.6 x 100

Question 8

How to Calculate: Unit Conversions

Answer 8

millimetres to nano etc

Question 9

Define Relative Atomic Mass

Answer 9

The ratio of the average mass of one atom of an element to one twelfth of the mass of an atom of carbon-12.