# Q 1.     Calculate the molecular masses of The molecular mass of :

= 2 * Atomic mass of Hydrogen

= 2 * 1u

=2u.

The molecular mass of :

= 2 * Atomic mass of Oxygen

= 2 * 16u

= 32u.

The molecular mass of :

= 2 * Atomic mass of Chlorine

= 2 * 35.5uu

= 71u.

The molecular mass of :

= Atomic mass of Carbon +2 * Atomic mass of Oxygen

= 12u + 2 * 16u

= 44u.

The molecular mass of :

= Atomic mass of Carbon +4 * Atomic mass of Hydrogen

= 12u + 4 * 1u

= 16u.

The molecular mass of :

= 2 * Atomic mass of Carbon + 6 * Atomic mass of Hydrogen

= 2*12u+ 6 * 1u

=24u+ 6u

= 30u.

The molecular mass of :

= 2 * Atomic mass of Carbon + 64* Atomic mass of Hydrogen

= 2*12u+ 4* 1u

=24u+ 4u

= 28u.

The molecular mass of :

= Atomic mass of Nitrogen + 3 * Atomic mass of Hydrogen

= 14u+ 3 * 1u

= 17u.

The molecular mass of :

= Atomic mass of Carbon +4 * Atomic mass of Hydrogen + Atomic mass of Oxygen

= 12u+ 4 * 1u + 16u

= 32u.

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