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14 Cards in this Set

  • Front
  • Back

What is avogadro's constant?


Define Mr

Relative Molecular Mass of a compound is the mass of one of its molecules relative to the mass of 1/12 of a carbon-12 atom.

Define Ar

Relative Atomic Mass of a element is the average of the masses of its isotopes relative to the mass of 1/12 of a carbon-12 atom.

What is the difference between empirical formula and molecular formula?

Empirical formula is the simplest whole number ratio of the elements in a molecule.

Molecular formula is the total number of atoms of each element present in a molecule.

What is the relationship between pressure and volume for ideal gases?

Pressure is inversely proportional to volume.

What is the relationship between pressure and temperature for ideal gases?

Pressure is directly proportional to temperature.

What is the relationship between temperature and volume for ideal gases?

Temperature is directly proportional to volume.

How can pressure, temperature, and volume all be linked by one formula?


State the ideal gas equation with units.



P = pressure in Pa

V = volume in m^3

n = no. of moles

R = 8.31 J/K mol

T = temperature in K

Distinguish between solute, solvent, and solution.

A solute is a substance that is dissolved in another substance.

A solvent is the substance that dissolves the solute.

A solution is the substance that is formed when the solute is dissolved in the solvent.

Define concentration.

The amount of solute dissolved in a unit volume of solvent. The units for concentration are g/dm^3 or mol/dm^3.

Describe the three states of matter.

In solids, particles vibrate in a regular arrangement, and are very close to each other.

In liquids, particles are randomly arranged, close together, and can move around each other.

In gases, particles are far apart and quickly move around in all directions.

What is the difference between elements, compounds, and mixtures?

An element is a pure substance that only contains one type of atoms.

A compound is a pure substance formed when two or more elements combine chemically.

A mixture contains two or more substances mixed together, but not chemically combined.

Give an example of a homogeneous and a heterogeneous mixture.

A solution is a homogeneous mixture.

A mixture of sand and water is heterogeneous.