Paper1/2-SC9 Flashcards
What is the relative formula mass of a substance?
The sum of the relative atomic masses.
Take a look at this example of moles 2.
How do you calculate the mass of reactants or products?
What is the stoichiometry of the reaction?
The ratio of moles of each substance.
What is the equation for the number of moles of a substance?
Why does magnesium increase in mass when heated?
It reacts with the oxygen to form magnesium oxide.
What is an empirical formula?
Simplest whole number ratio of atoms or ions of each element in a substance.
What is the molecular formula?
The actual number of atoms of each element in one molecule.
How is the emperical formula calculated?
What controls the mass of product formed in a reaction?
The limiting reactant is the amound of reactant that is not in excess so it is used completely.
How is a solution made?
It is made when a solute dissolves in a solvent.
Take a look at this example of moles.
What is the equation for concentration?
What is concentration?
The amount of solute dissolved in a stated volume of a solution.
What is a mole?
One mole of a substance contains the avogrado constant number of particles and willl equal the RAM in grams.
What is the law of conservation of mass?
Mass of solution is the same as that of the solvent and solute.
