Amount Of Substance Flashcards
(16 cards)
What is Avogadros Constant?
6.02x10²³ mol⁻¹
How do you calculate amount of substance?
n=m÷M
mol = mass ÷ molar mass
What is an empirical formula?
The simplest whole number ratio of atoms of each element present in a compound
What is a molecular formula?
The number and type of atoms of each element in a molecule
What is a hydrated compound?
A compound that is crystalline and contains water molecules
What is an anhydrous compound?
A compound that contains no water molecules
What is Water of Crystallisation?
Water molecules that are bonded into the crystalline structure of a hydrated compound
How do you calculate concentration?
n=cV
Mol = Concentration X Volume
How do you convert from cm³ to dm³?
÷1000
Molar gas’s volume _______ as temperature increases
Increases
Molar gas volume _______ as pressure increases
Decreases
How do you calculate moles from gas volume at RTP?
n=V÷24 dm³
Mol = Volume ÷ 24 dm³
What is the ideal gas equation?
pV=nRT
Pressure X Volume = mol X gas constant X temperature
How do you convert from ºC to K?
Add 273
How do you calculate atom economy?
Atom economy = (sum of molar mass of desired product ÷ sum of molar mass of all products) X 100
How do you calculate percentage yield?
Percentage yield = (actual yield ÷ theoretical yield) X 100
