Question

A sample contains 27.1 g of calcium oxide. How many moles of calcium oxide are in the sample?
a.0.383 mol
b.0.393 mol
c.0.483 mol
d.0.493 mol

Answer 1

Answer:

The answer is option C i.e 0.483

Answer 2

Answer:

(C) 0.483 moles of calcium oxide are there in 27.1 grams.

Explanation:

As per the question,

Molar mass of calcium oxide (CaO)= 40+16 = 56  

Now, given mass is = 27.1 gm

As we know,

$Moles= \frac{Given\:Mass}{Molar\: mass}$

So, by applying the above formula here:

$Moles =\frac{27.1}{54}\\\\Moles = 0.483 \:moles$

Hence, (C) 0.483 moles of calcium oxide are there in 27.1 grams.

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