Relative Atomic Mass, Avogadro's Constant, The Mole Flashcards
What is relative atomic mass?
The average mass of an element across all of its isotopes compared to 1/12th of a carbon-12 atom.
What is relative molecular mass?
The average mass of a compound across all of its isotopes compared to 1/12th of a carbon-12 atom.
What is Avogadro’s constant?
The number of atoms in 1 mole of a substance.
6.022 x 10²³
What is the formula for finding the number of atoms in a substance?
no. of particles = no. of moles of a substance x (6.022 x 10²³)
particles = nL
What is percentage yield?
The % of a product produced compared to the theoretical yield.
What is the actual yield?
The actual amount of product that is produced in the reaction which is not always equal to the theoretical yield.
What is the theoretical yield?
The amount of product that you EXPECT to produce in the reaction.
Calculated using reacting masses.
What is the formula for percentage yield?
(Actual yield / Theoretical yield) x100
What can the percentage yield be used to investigate?
The efficiency of practical techniques and whether reactions proceed as estimated.
What is atom economy?
The % of the amount of reactants made into useful products.
What is the formula for calculating atom economy?
(Mr of useful products / Mr of all reactants) x100
What can atom economy be used to investigate?
Efficiency of using a specific reaction to product a product.
What is empirical formula?
The simplest whole number ratio of the number of atoms in a compound.
What is molecular formula?
The number of atoms present in a compound.
What is the equation for finding the concentration?
Concentration = mol OR mass / volume
