Question

mass of 2.74.moles.of potassium permanganate
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Answer 1

Answer:

58.66

Explanation:

No of moles = mass / molar mass

in the question

number of moles = 2.74

molar mass of pottasium per magnet is 158

mass = 158÷2.74

58.66

Answer 2

2.74 moles of potassium permanganate contain 432.92 grams.

Explanation:

Potassium permanganate is an inorganic compound with the molecular formula $KMnO_4$. It appears as a purplish coloured solid.

To find the mass of $KMnO_4$ we first calculate the molecular weight of $KMnO_4$

K = 39u, Mn = 55u ; O = 16u.

$Molecular weight of KMnO_4 = 39+55+ (16*4)\\Molecular weight of KMnO_4 = 158 gm\ mol^{-1}$

$Moles = \frac{Mass}{Molecular\ weight}$

Given:

Moles = 2.74 mole

Substituting:

$2.74 = \frac{Mass}{158}\\\\Mass = 2.74 * 158\\Mass = 432. 92\ grams.$

Mass of 2.74 moles of potassium permanganate = 432.92 grams.