Question

1)what is the name of the formula obtained by writing the subscripts of a molecular formula in the form of the simplest whole number ratio

2)a side reaction with nitrogen prevents the magnesium from completely reacting with oxygen in air what is added to complete the formation of magnesium oxide from the magnesium nitride?

3)define the law of constant composition what two elements are being used to demonstrate that law in this experiment?(determination of the formula of a metal oxide

Answer 1

1)ANS    ; Empirical formula

relation is   molucular formula   = n * empirical formula

empirical formula gives simplest ratio,molecular formula gives   actual ratio of atoms in a molecule.

         2) ans    ;    Mg   + air,    Mg + O2 MgO , Mg   + N2 Mg₃N₂

₃) ANS      ;     definition   ;    " a pure chemical compound always contains same elements combined together

in the same definite proportion by weight"

    ex ; it was observed that in all the samples ,the ratio of metal& oxygen by weight has been found to be

the same.

            thank u