equations

Question 1

Avogadro’s constant equation

Answer 1

number of particles = number of moles x 6.02 x 10^23

Question 2

moles (2)

Answer 2

moles = mass of substance / Mr
moles = concentration x volume

Question 3

ideal gas equation

Answer 3

pV = nRT

Question 4

percentage yield

Answer 4

percentage yield = (actual yield / theoretical yield) x 100

Question 5

atom economy

Answer 5

atom economy = (molecular mass of desired product / sum of molecular masses of all reactants) x 100

Question 6

enthalpy change of reaction

Answer 6

enthalpy change of reaction = total energy absorbed - total energy released

Question 7

enthalpy change (if pressure is constant)

Answer 7

q = mcΔT

Question 8

rate of reaction

Answer 8

rate of reaction = amount of reactant used or product formed / time

Question 9

free energy change

Answer 9

ΔG = ΔH - TΔS

Question 10

relationship between enthalpy and entropy change

Answer 10

T = ΔH / ΔS

Question 11

the rate equation

Answer 11

rate = k[A]^m[B]^n

Question 12

the Arrhenius equation

Answer 12

k = Ae^(-Ea/RT)

Question 13

the Arrhenius equation in logarithmic form

Answer 13

In k = -(Ea/RT) + In A

Question 14

mole fraction of a gas in a mixture

Answer 14

mole fraction of a gas in a mixture = number of moles of gas / total number of moles of gas in the mixture

Question 15

partial pressure of a gas

Answer 15

partial pressure of a gas = mole fraction of a gas x total pressure of the mixture