Question

9. Calculate number of moles in 7.85 g of
Iron (atomic mass =55.8)
*
O a. 0.4
O b.0.10
O c.0.14
O d. 0.71​

Answer 1

Explanation:

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Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

Calculate number of moles in 7.85 g of Iron ( atomic mass = 55.8 )

a. 0.4

b. 0.10

c. 0.14

d. 0.71

EVALUATION

Here it is given that

Mass of Iron = 7.85 g

Atomic mass of Iron = 55.8

Thus the number of moles

$\displaystyle \sf = \frac{ Mass \: of \: Iron }{Atomic \: mass \: of \: Iron }$

$\displaystyle \sf { = \frac{7.85}{55.8} }$

$\displaystyle \sf{ = 0.14}$

FINAL ANSWER

Hence the correct option is c. 0.14

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