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vivado [14]
2 years ago
7

HELP DUE IN 7 minutes TwT

Chemistry
2 answers:
Keith_Richards [23]2 years ago
8 0

Answer:

answer is NA2S

Explanation:

A P E X

mario62 [17]2 years ago
4 0

Answer:

Answer is C

Explanation:

the valency of sulphur is 2 ans sodium is 1

by crossing it forms NA2S

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3 years ago
What is the mass of oxygen in 3.34 g of potassium permanganate?
3241004551 [841]

Answer:

1.35 g

Explanation:

Data Given:

mass of Potassium Permagnate (KMnO₄) = 3.34 g

Mass of Oxygen: ?

Solution:

First find the percentage composition of Oxygen in Potassium Permagnate (KMnO₄)

So,

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Calculate the mole percent composition of  Oxygen in Potassium Permagnate (KMnO₄).

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Since the percentage of compound is 100

So,

                        Percent of Oxygen (O) = 64 / 158 x 100

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So,

for the 3.34 grams of Potassium Permagnate (KMnO₄) the mass of Oxygen will be

                  mass of Oxygen (O) = 0.405 x 3.34 g

                  mass of Oxygen (O) = 1.35 g

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Electron configuration for Be2+
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