Quantitative Chemistry Flashcards
1
Q
What is the formula for moles?
A
Moles = Mass ÷ Mr
2
Q
What is the law of conservation of mass?
A
Mass is not created or destroyed in a chemical reaction
3
Q
What is percentage yield, and how is it calculated?
A
A measure of how much product is obtained compared to the maximum possible;
Formula: (Actual yield ÷ Theoretical yield) × 100
4
Q
What is atom economy, and why is it important?
A
The percentage of reactant atoms that become useful products;
Formula: (Mr of useful products ÷ Total Mr of reactants) × 100
5
Q
What is Avogadro’s constant?
A
6.02 × 10^23 particles per mole
