Topic 5 Equations

mass = vol x conc.

n = vol x conc.

Uncertainty x 100/titre

vol = n x 24 or room temp gas = vol/24 Equal volumes of gases under the same conditions of temperature and pressure contain the same number of molecules.

atoms = moles x avos constant 6.022 × 10²³

pV = nRT p= pressure (Pa) V= volume (m^3/ x10-6) n= no. of moles R= gas constant (8.31) (JK^-1mol^-1) T= temperature (+273) (K)

Number of particles found in 12g of carbon-12

-Start with the full equation -Replace the formulae of ionic compounds by the separate ions -Delete any ions that appear identically on both sides.