L4: Chemical Equations, the Mole and Molarity Flashcards
1
Q
How many atoms are found in one mole of any substance?
A
6.022 x 10^23
2
Q
True or false: The mass of one mole of any substance is simply its relative atomic mass (or molecular mass) expressed in grams.
A
True
3
Q
What is the formula for calculating number of moles?
A
number of moles = mass / Mr
or
mass = number of moles x Mr
4
Q
True or false: 1 mole of any gas occupies the same volume at standard temperature and pressure.
A
True
5
Q
What volume is occupied by 1 mole of any gas?
A
22.4L
6
Q
What is the formula for calculating molarity?
A
M = number of moles / volume (in litres)
