C3 - Quantitative Chemistry

    Cards (13)

    • what is the law of conservation of mass
      -no atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactants
    • what is the relative atomic mass of a compound (mr)
      -the sum of the relative atomic masses of the atoms in the numbers shown in the formula
    • what is the relative atomic mass in a balanced equation mean
      -the sum of the relative formula masses of the reactants in the quantities shown equals the sum of the relative formula masses of the products in the quantities shown
    • why do some reactions appear to involve a change in mass
      -a reactant or product is a gas and its mass has not been taken into account
    • what happens when a metal reacts with oxygen
      -when a metal reacts with oxygen the mass of the oxide produced is greater than the mass of the meta
    • what happens in thermal decomposition of a metal carbonate
      -in thermal decompositions of metal carbonates carbon dioxide is produced and escapes into the atmosphere leaving the metal oxide as the only solid product
    • what are chemical amounts measured in
      -moles (mol)
    • what is mass of one mole in g numerically equal to
      -it's relative formula mass
    • what does one mole of a a substance contain the same number of
      -the stated particles, atoms, molecules or ions as one mole of any other substance.
    • what is the avogadro constant
      -The number of atoms, molecules or ions in a mole of a given substance
    • what is the value of Avogadros constant
      -6.02 x 10^23 per mole
    • what is the limiting reactant
      -the reactant that is completely used up
      -it limits the amount of products
    • how can the concentration of a solution be measured
      -mass per given volume of a solution