Equations

Question 1

Percentage error=

Answer 1

Precision of instrument used/ measurement made X100

Question 2

Average relative atomic mass=

Answer 2

(Relative abundance x isotopic mass)+(relative abundance x isotopic mass)…./100

Question 3

Speed of light, c, ms-1=

Answer 3

Wavelength, lambda, m X frequency, mu, s-1

Question 4

Energy of Photon, E, J=

Answer 4

Planck constant, h X frequency, mu, s-1

Question 5

Percentage yield=

Answer 5

Experimental yield/theoretical yield X100

Question 6

Amount of moles, n , mol=

Answer 6

Mass, m, g/molar mass, M, gmol-1

Question 7

Concentration, c, gdm-3=

Answer 7

Concentration, c, moldm-3 X molar mass gmol-1

Question 8

Concentration, c, moldm-3=

Answer 8

Amount, n, mol/volume, v, dm3