Equations Topic 1

Question 1

Number of particles equation

Answer 1

N0 = n x Na

where
N0 = number of particles
n = moles
Na = Avogadro’s number

Question 2

Number of moles by molar mass and mass

Answer 2

n = m/M

where
n = number of moles
m = mass
M = molar mass

Question 3

Number of moles by concentration

Answer 3

n = cv

where
n = number of moles
c = conccentration
v = volume

Question 4

Calculating the moles from the beginning and end by changing concentration and volume

Answer 4

c1v1 = c2v2

c = concentration
v = volume

Question 5

Percentage yield equation

Answer 5

% yield = experimental yield / theoretical yield (maximum calculated yield you can get)

Question 6

Ideal gas law equation

Answer 6

PV = nRT

where
P = pressure
V = volume
n = number of moles
R = gas constant
T = temperature

Question 7

Calculating the moles from the beginning and end by using ideal gas law

Answer 7

P1V1 / T1 = P2V2 / T2

where
P = pressure
V = volume
T = temperature

Question 8

Calculating the number of moles in STP (standard temperature and pressure)

Answer 8

n = V / Vstp

where
n = number of moles
V = volume
Vstp = molar volume