CHAPTER 3: AMOUNT OF SUBSTANCES Flashcards
What is the equation for percentage mass?
(Ar x number of atoms in element) / Mr of the compound
x 100
What is the equation that links moles, mass and Mr?
moles = mass / Mr
What is the equation that links volume, moles and 24?
volume of gas = moles x 24dm or 24000cm
What is the equation that links moles, concentration and volume?
moles = concentration x volume
What is the equation that links concentration, moles of solute and volume of solute?
concentration = moles of solute / volume of solute
What is the equation for atom economy?
atom economy = (relative formula mass of desired products / relative formula mass of all reactants) x 100
What is the equation for percentage yield?
percentage yield = (mass of an actual product / theoretical mass of product) x 100
What is Avagrado’s constant?
6.02 x 10*23. This is the number of particles in each mole of carbon-12
How do you convert gram/dm3 to mol/dm3
divide Mr
How do you convert mol/dm3 to gram/dm3
x Mr
What is amount of substance?
The number of particles in a substance
What is molecular formula?
The number of atoms in each element of a molecule
What is empirical formula?
The simplest whole number ratio of atoms of each element in a compound
