Question

Introduction to Chemistry
A sample of aluminium has a mass of 54.0 g. What is the mass of the same number of magnesium
atoms? (At. wt. Al = 27, Mg = 24)
(A) 12 g
(B) 24 g
(C) 48 g
(D) 96 g.
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Answer 1

Nice question !!

Option c is correct!!

Given:-

At. wt. Al = 27, Mg = 24

$mole = \frac{givenmass}{atomicmass}$

Now ,

no. of moles in sample=

$mole = \frac{54}{27}$

$mole = 2$

Now,No. of moles of magnesium=no. of moles of almunium=2.

$mass \: of \: mg = mole \times atomic \: mass$

hence

$mass \: of \: mg = 24 \times 2 = 48$

mass of magnesium = 48 gm ans

Answer 2

option C is right......✔✔✔✔