Answer
42. (a) As black represents carbon atom (C) and white represents hydrogen atom (H) and
each of the four white atoms is bonded to the black atom, so this diagram represents a
carbon atom bonded to four hydrogen atoms, so we can write
Molecular formula of compound= CH4
Name of the compound= Methane
(b) As blue represents nitrogen atom (N) and white represents hydrogen atom (H) and
each of the three white atoms is bonded to the blue atom, so this diagram represents
a nitrogen atom bonded to three hydrogen atoms, so we can write
Molecular formula of compound= NH3
Name of the compound= Ammonia
Work Step by Step
1. Identify the atom corresponding to the color given in the problem.
2. Check the atoms which are bonded to each other.
3. Identify the molecule.
4. Write the formula and name of the compound.
