Quantitative Chemistry Flashcards
1
Q
What is the law of conservation of mass?
A
The law of conservation of mass states that no atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactants.
2
Q
What is the relative formula mass?
A
The relative formula mass (Mr) of a compound is the sum of the relative atomic masses of the atoms in the numbers shown in the formula.
3
Q
What is the Avogadro constant?
A
The number of atoms, molecules or ions in a mole of a given substance is the Avogadro constant. The value of the Avogadro constant is 6.02 x 1023 per mole.
4
Q
What is the equation for moles?
A
number of moles = mass ÷ relative formula mass
