1
Q
Mass number
A
Atomic number (number of protons) + number of neutrons
2
Q
Speed of light (ms-1) (3.00x10+8 ms-1)
A
Wavelength (m) x frequency (s-1)
3
Q
Energy of photon (J)
A
Planck constant (Js-1) x frequency (s-1)
4
Q
Enthalpy change (🔺H) (enthalpy change of reaction)
A
H,products (sum of enthalpy changes of products) - H,reactants (sum of enthalpy changes of reactants)
5
Q
Energy transferred (KJ)
A
Specific heat capacity (Jg-1K-1) (4.18) x mass (g) x temperature change (🔺T)
6
Q
Density
A
Mass/volume
7
Q
Number of particles
A
(Mass/molar mass(Mr)) x 6.02x10^23
