Chemistry
State two conditions necessary to write the molecular formula of a compound.
Related Questions
Write the molecular formulae of compounds calcium oxide, hydrogen sulphide, lead sulphide, zinc oxide and carbon dioxide.
Give two examples each of compounds existing in the following states:
(a) Solid
(b) Liquid
(c) Gaseous
State the number of atoms of each element, present in
(a) C6H12O6
(b) H2SO4
(c) HNO3
(d) CaCO3
Also name these compounds.
Why are symbols and formulae of substances important?