Moles

Question 1

What unit is used to measure chemical amounts?

Answer 1

Moles, symbolized as mol.

Question 2

What is the mass of one mole of a substance in grams equal to?

Answer 2

Numerically equal to its relative formula mass.

Question 3

How many particles does one mole of a substance contain?

Answer 3

The same number of particles as one mole of any other substance, determined by the Avogadro constant (6.02 × 10^23 per mole).

Question 4

What does the Avogadro constant represent?

Answer 4

The number of atoms, molecules, or ions in a mole of a given substance.

Question 5

How can moles be applied in measuring various entities?

Answer 5

Moles can apply to atoms, molecules, ions, electrons, formulae, and equations.

Question 6

What is the Avogadro constant’s value?

Answer 6

6.02 × 10^23 per mole.

Question 7

How can students use the relative formula mass to calculate moles?

Answer 7

They should be able to calculate the number of moles in a given mass of a substance and vice versa using the relative formula mass.

Question 8

How can the balancing numbers in a symbol equation be calculated?

Answer 8

By converting the masses of reactants and products from grams to moles and then converting the numbers of moles to simple whole number ratios.

Question 9

What skill should students develop regarding symbol equations?

Answer 9

Balancing an equation given the masses of reactants and products.

Question 10

What mathematical skills are necessary for these calculations?

Answer 10

Changing the subject of an equation and substituting numerical values into algebraic equations with appropriate units for physical quantities.