C5 - Formulae, equations and amounts of substances

What is the definition of a mole

The amount of substance in grams that has the same number of particles as there are atoms in 12 grams of carbon 12

What is the equation for moles with Mr and mass?

Moles = Mass/Mr

What is the formula for gas volume and moles?

Gas volume = mol. * 24

What is the formula for concentration with mol. and volume

Concentration = mol. / Volume

What is the definition for empirical formula

The simplest ratio of atoms of each element in the compound

What is the Definition of molecular formula

The actual number of atoms of each element in the compound

What are assumptions made for ideal gas

Identical particles in rapid random motion

Particles do not gain or lose kinetic energy when they collide

No intermolecular forces

Particles are hard spheres of negligible size

What is the ideal gas formula?

P V = n R T

P = pressure (Pa)

V = volume (m³)

n = moles

R = Gas constant (8.31 JK^-1 mol^-1)

T = Temperature (K)

What are potential errors of using a gas syringe

Gas escapes before the bunk is inserted

Syringe sticks

Some gasses like carbon dioxide or sulfur dioxide are soluble in water so the true amount of gas is not measured