Assessment task

Question 1

Law of conservation of mass

Answer 1

Matter can neither be created or destryoed but only changed

Question 2

Balanced Equation

Answer 2

Same number of elements on each side

Question 3

Quantitive calculations

Answer 3

How much is needed to reacted with a given mass, called stoichiometry

Question 4

Relative atmoic mass (Atomic weight)

Answer 4

Average mass of the atoms present in the naturally occurring elemtn relative to the mass of a carbon-12 isotope atom

Question 5

The relative molecular mass (Molecule Weight)

Answer 5

Mass of a molecule of the compound relative to the mass of an atom of the carbon 12 isotope. Sum of the relative atomic masses

Question 6

Relative formula mass

Answer 6

Sum of the relative atomic masses as given in the formula of a compound. Used for Ionic compounds as Ions don’t have discrete molecules and thus calculated in ratio.

Question 7

Mole

Answer 7

A quantity that contains as many units they are atoms in Carbon-12

Question 8

Avogadros constant

Answer 8

6.022x10^23

Question 9

Molar mass

Answer 9

Mass in one mole

Question 10

Mass to mole formula

Answer 10

n=m/MM

Question 11

Moles to # of atoms

Answer 11

N= nx Na