Equations for All Papers

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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Front (Question)

Equation for: Relative atomic mass

Back (Answer)

((Isotopic mass x % abundance) + (Isotopic mass x % abundance) + (….)) / sum of all % abundance (% abundance can be substitued for relative intensity)

Front (Question)

Equation for: Moles = (Basic Equation)

Back (Answer)

Mass / Mr Mass is in grams

Front (Question)

Equation for: Percentage Error =

Back (Answer)

= uncertainty / (measurement or reading) One measurement is two readings, e.g. temperature is a reading but length is a measurement

Front (Question)

Equation for: Concentration (moldm^(-3)) =

Back (Answer)

moles / volume (dm^3)

Front (Question)

Equation for: Ideal Gas Equation

Back (Answer)

PV = nRT P= pressure (in Pa) V= Volume (in m^3) n= number of moles R= gas constant (8.31) T= temperature (K)

Front (Question)

Equation for: Molar gas volume (used at Room Temperature)

Back (Answer)

moles = volume (dm^3) / 24

Front (Question)

Equation for: % Yield

Back (Answer)

(Actual Yield / Theoretical Yield ) x100

Front (Question)

Equation for: Atom Economy

Back (Answer)

( Mr useful products/ Mr of all products ) x100

Front (Question)

Enthalpy Change Calculations - Using Enthalpy of Formation For Energetics and Thermodynamics

Back (Answer)

Sum of Products - Sum of reactants

#10

Front (Question)

Enthalpy Change Calculation - Calorimetry

Back (Answer)

q = mc ^ T q = heat given out (J) m = mass (g) c =Specific heat capacity (J/g/K) ^T = Temperature rise (K)

#11

Front (Question)

Enthalpy Change per mole Calcualtion - Calorimetry

Back (Answer)

q / number of moles reacting

#12

Front (Question)

What is the Equation for Kc?

Back (Answer)

when aA + bB -> cC + dD, then: Kc = [C]^c x [D]^d/ [A]^a x [B]^b

#13

Front (Question)

Equation for Acceleration (Mass Spectrometry)

Back (Answer)

KE = 1/2mv^2 when: * KE = kinetic Energy of Ion (Joules) * m = mass of one ion (Kg) * v = velocity of the ion (in m/s)

#14

Front (Question)

Entropy Change Calculations

Back (Answer)

Entropy = Products - Reactants

#15

Front (Question)

Gibbs Free Energy Change Calculations

Back (Answer)

^G = ^H -T^S when ^G < 0 a reaction is feasible Draw Gibbs graphs, y= mx+c

#16

Front (Question)

Equation for: Reaction rate (involving k)

Back (Answer)

reaction rate = k [a]^n where n is the order and [A] is concentration

#17

Front (Question)

State: Arrhenius equation

Back (Answer)

k = Ae ^(-Ea/RT) where k = rate constant A= arrhenius constant Ea = Activation energy (J) R= Gas Constant T = Temperature (K)

#18

Front (Question)

Equation for: Partial Pressure of gases p(A) Topic 19

Back (Answer)

= mol fraction (nA) x total pressure (Ptot)

#19

Front (Question)

Equation for Mole Fraction Topic 19

Back (Answer)

number of moles of gas A/ number of all moles of gas

#20

Front (Question)

Equation for: Kp when: A(g) + B(s) -> C(g) + 2D(g)

Back (Answer)

p(C) x p(D)^2 _______________ p(A)

#21

Front (Question)

Equation for: Energy Gap - Equation 1 (Transition Metals) When given: -planks constant (h) -velocity of light (c) -wavelength of light (l)

Back (Answer)

= Planks constant x Velocity of light ________________________ Wavelength of light

#22

Front (Question)

Equation for: Energy Gap - Equation 2 (Transition metals) when given: -planks constant (h) -frequency of light (v)

Back (Answer)

planks constant x frequency of light

#23

Front (Question)

Equation for: Kw =

Back (Answer)

Kw= [H+] x [OH-]

#24

Front (Question)

Equation for pH

Back (Answer)

pH = -log[H+]