Question

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Answer 1

Answer:

1) Mole = Mass/ Molecular weight

1/2=M/28

M= 28×1/2

M=14g

2) same formual as 1

1/2 × 14

M=7g

3) Mole = Number of particles / Na

Na = Avagraeo number = 6.022 ×10 ^23

Mole = 3 ×10 ^23 / 6 × 10 ^23

Mole = 1/2

Mass = same as 2

Mass = 7g

4) Same formula as 3

Mole = 6×10^23 / 6×10^23

Mole = 1

Mole =Mass / molecular weight

MASS = 1×28

=28g

So then relation would be

14/2 = 7 = 7 = 28 /4

X/2 = Y=Z=W/4

Option B is correct

Hope it helps