C3.1.7 - Mole calculations Flashcards
1
Q
What is the equation where the mass of a substance is related to its molar mass and amount?
A
mass(g) = molar mass(g/mol) x amount(mol)
2
Q
What does it mean when an element is in excess?
A
When a reactant present in an amount if greater than that needed to react with the other reactants
3
Q
What is a limiting reactant?
A
A reactant present in an amount is less than that needed to react completely with the other reactant in a chemical reaction
4
Q
What is stoichiometry?
A
It describes the relative amount of each substances involved, and is to do with these balancing numbers
