Module 2 NTR defintions

Question 1

What is amount of a substance (mole)?

Answer 1

A mole is the amount of substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12

Question 2

What is Avogadro’s Constant, Na?

Answer 2

The number of particles in one mole of any substance is equal to 6.02 x 10^23 mol^-1

Question 3

What is molar mass?

Answer 3

The mass, in g, per mole of a substance (units = g mol^-1)

Question 4

What is molar gas volume?

Answer 4

The gas volume per mole of a substance. This is 24.0 dm^3 mol^-1 at room temperature and pressure (RTP)

Question 5

What is the empirical formula?

Answer 5

The simplest whole number ratio of atoms of each element present in a compound

Question 6

What is the molecular formula?

Answer 6

The actual number and type of atoms of each element in a molecule

Question 7

What is the ideal gas equation?

Answer 7

pv = nRT

Question 8

What is a hydrogen bond?

Answer 8

A strong dipole-dipole attraction between molecules containing O-H, N-H or F-H bonds