5.3 Quantitative Chemistry

Question 1

Concentration

Answer 1

The amount of substance (e.g. the mass) in a certain volume of a solution

Question 2

Conservation of mass

Answer 2

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

Question 3

Relative formula mass

Answer 3

The sum of the relative atomic masses of the atoms in the numbers shown in the formula.

It is numerically equal to the mass of one mole of a substance in grams.

Question 4

Thermal decomposition

Answer 4

The reaction that occurs when heat is applied to a compound
causing it to break down into its different chemical constituents

Question 5

Uncertainty

Answer 5

All measurements have a degree of uncertainty regardless of precision and accuracy.

Uncertainty can be due to the limitations of the measuring equipment or due to the skill of the experimenter carrying out the measurements