Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
- 3rd side (hint)
definition of relative atomic mass Ar
|
The mass of one atom of it relative to its mass of one atom of 12, which has a mass of exactly 12 units on the atomic mass scale.
|
|
|
The relative molecular mass Mr
|
of a substance is the sum of the relative atomic masses of all the atoms in a molecule of that substance.
|
|
|
The mole (mol)
|
The quantity of a substance which contains as many particles (atoms,molecules or ions)atoms there are atoms in exactly 12 of 12 C.
|
|
|
Avogadro's Constant (or Avogadro's number)
|
L,is the number of atoms present in 12 g of 12 C.The value of Avogadro's Constant is 6.022 x10 (23) mol-(1)
|
|
|
unit for molar mass
|
g mol-1
|
|
|
molar mass
|
Is the the mass of 1 mole of the substance in grams.
|
|
|
What is the relationship between mass (m) and Molar mass (M) is
|
number of moles (n)=mass÷molar mass
|
The equation
|
|
The molar volume
|
Is the volume occupied by 1 mole of a gas and it's value is 22.4dm (3) for any gas at standard temperature and pressure (stp).Standard temperature is 0°c (273k) and standard pressure 1 atmosphere (1atm)
At room temperature (20°C or 293K) and 1 atm pressure (rtp ) the value of the molar volume is approximately 24.0dm (3) |
|
|
How do you work out percentage yield
|
|
|
|
a molar solution
|
Is one which contains 1 mole of solute in 1 dm (3) of solution
|
|
|
molarity (molar concentration )
|
of a solution is the number of moles of solute present in 1 dm (3) of a solution.
|
|
|
whats the unit for molarity
|
mol dm(-3)
|
|
|
How to work out molarity
|
|
|