M2 ,, Amount Of Substance

Question 1

Mass of one mole formula?

Answer 1

n(mol) = mass (g) / Mr (gmol-1)

Question 2

Define mole?

Answer 2

The amount of substance in grams that has the same number of particles as there are atoms in 12 grams of carbon-12

Question 3

Define molar mass?

Answer 3

The mass in grams of 1 mole of a substance and is given the unit of gmol-1

Question 4

Concentration formula?

Answer 4

Concentration (Moldm-3) = amount / volume (dm3)

Question 5

Conversions?

Answer 5

Cm3 –> dm3 = divide by 1000
Cm3 —> m3 = divide b 1000 000
Dm3 —> m3 - divide b 1000

Question 6

Mass concentration formula?

Answer 6

Mass concentration (gdm-3) = mass(g) / volume (dm3)

Question 7

Ideal gas equation?

Answer 7

pV=nRT
Pressure = Pa
Volume = m3
Temp = k
N = mol
R = 8.31KJmol-1
Celsius to Kelvin = add 273

Question 8

Density equation?

Answer 8

Density (gcm3) = mass / volume

Question 9

Number of particles equation?

Answer 9

No of particles = mol X avogadros constant

Question 10

Percentage yield equation?

Answer 10

= actual yield / theoretical yield X 100

Question 11

Atom economy % equation?

Answer 11

= mass of useful products / mass of all reactants X100