PC2

Question 1

Define ‘relative atomic mass’

Answer 1

The weighed average mass of an atom of an element, taking into account its naturally occurring isotopes, relative to 1/12 the relative atomic mass of an atom of carbon-12

Question 2

Define ‘relative molecular mass’

Answer 2

The mass of a molecule compared to 1/12 the relative atomic mass of an atom of carbon-12

Question 3

Number of moles = ____ / ______

Answer 3

Mass (g)

Mr

Question 4

Number of moles in solution = _______ x _______

Answer 4

Concentration

Volume

Question 5

What is the ideal gas equation?

Answer 5

pV =nRT

Question 6

% atom economy = ______ / ________ x 100

Answer 6

Mass of desired product

Total mass of reactants

Question 7

Yield = ______ / ______ x 100

Answer 7

The number of moles of a specific product
Theoretical maximum number of moles of the product

or

The number of grams of a specified product obtained In a reaction
Theoretical maximum number of grams of the product