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Q.

The molecular mass of KMnO4 is


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a

156 g 

b

155 g

c

150 g

d

158 g

answer is C.

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Detailed Solution

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The molecular mass of KMnO4 is 158 g.
Mass of Mn = 55 g
Mass of potassium = 39 g
Mass of oxygen = 16 g
So, the mass of KMnO4 = 39 + 55 + 16×4
                                       ⇒ 39+55+64                                                                              ⇒ 158 g
 
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