2 The Mole SAQ 1

A mole of a substance is the amount of that substance that contains as many particles (atoms, molecules, or ions) as there are atoms of 12C in 12g of 12C.

Avagadro's Law states that equal volumes of gases, under the same conditions of temperature and pressure, contain equal numbers of molecules.

The key formula is moles x Mr = Mass (in grams), where 'moles' represents the number of moles of the substance, 'Mr' represents the molar mass of the substance, and 'Mass' represents the mass of the substance in grams.

<p>24L or 24000 cm^3</p> Signup and view all the answers

<p>The volume of one mole of a gas at standard temperature and pressure is 22.4L or 22,400cm3.</p> Signup and view all the answers

<p>One mole of a substance contains 6 x 10^23 particles, where particles can be atoms, molecules, or ions.</p> Signup and view all the answers

<p>The standard conditions are 273K and 101325 Pa, and at these conditions, one mole of a gas occupies a volume of 22.4L or 22,400cm3.</p> Signup and view all the answers