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Q.

The number of moles of Sodium Oxide in 620g of it is ___________

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a

1 mol

b

10 moles

c

18 moles

d

100 moles

answer is B.

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Detailed Solution

M.W of Sodium Oxide

(N a_{2} O)

= 62

$62 g N a_{2} O = 1 m o l e$

$∴ 620 g N a_{2} O = 10 m o l e s$

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