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Please give the solution of question no 21 of the above image,thanks in advance

Please give the solution of question no 21 of the above image,thanks in advance

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Grade:12th pass

1 Answers

Arun
25750 Points
3 years ago
Mass of the Sodium Hydroxide = 0.15 g
Molar Mass of the Sodium Hydroxide = 40 g/mole.
[∵ 23 + 16 + 1 = 40]
 
∵ No. of moles = Mass/Molar Mass
∴ No. of moles = 0.16/40
⇒ No. of moles of Sodium Hydroxide = 0.004 moles.
 = 0.004× 10³ millimoles [ ∵ 1 mole = 10³ millimoles.]
 = 4 millimoles.
 
 
Hence, the number of millimoles in the 0.16 grams of the Sodium hydroxide is 4 millimoles.
 
 

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