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Q.

The number of moles in 5 grams of calcium is ___________.

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a

12.5 mole

b

5 mole

c

1.25 mole

d

0.125 mole

answer is A.

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Detailed Solution

40g of ‘Ca’ means 1 mole of ‘Ca’

5g of ‘Ca’ means 0.125 moles of ‘Ca’.

⇒  5g of Ca _____ How many moles

x=540=0.125 .

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