5.1 mole concept 🦦

Question 1

define relative atomic/isotopic/molecular/formula mass

Answer 1

the number of times the particle/isotope/molecule/ion is heavier than 1/12 the mass of carbon-12

Question 2

define mole

Answer 2

containing 6.02 x 10^23 elementary entities

Question 3

empirical vs molecular formula

Answer 3

empirical gives simplest ratio of the number of atoms of each element present in the compound.
molecular formula gives the actual number of the number of atoms of each element present in the compound.

Question 4

combustion equation

Answer 4

CxHy + (x+y/4)O2 -> xCO2 + y/2H2O

Question 5

is water present as liquid or gas in combustion equations?

Answer 5

liquid unless stated otherwise