Question

A binary compound of 'A' and 'B'
contained 'A' and 'B' in 1:2 weight ratio.
The atomic weights of 'A' and 'B' are in
2:1 ratio. Then its formula is
(2) A2B
(4) AB4,
(1) A4B,
(3) AB2,​

Answer 1

Answer:

3

Explanation:

everytime atoms combine, the atom with less electrons to bond with another atom needs to multiply itself in order 2 balance the bond

Answer 2

Concept:

• Compounds
• Atomic weights
• An atom's mass is its atomic mass.
• Although the kilogramme is the SI measure of mass, the unified atomic mass unit, or dalton, is a common way to express atomic mass. An unbound carbon-12 atom in its ground state has a mass of 1/12 of a Da.
• Formula mass

Given:

• The ratio of weights of A and B = 1:2
• The ratio of atomic weights of A and B = 2:1

Find:

• The formula of the compound

Solution

• Let the weight of A be x and B be 2x
• Let the atomic weight of A be 2m and the atomic weight of B be m
• The number of atoms of A will be n1 = x/2m
• The number of atoms of B will be n2 = 2x/m
• n1 = n2/4
• 4n1 = n2
• The formula of the compound is AB4.

The correct option is 2) AB4

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