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12345 [234]
2 years ago
9

A sample of iron contains 2.806 x 1024 atoms of iron (Fe). How many moles of iron are in the sample?

Chemistry
1 answer:
xxMikexx [17]2 years ago
4 0

Answer:

Approx. 20 moles of iron.

Explanation:

There are approx. 6.022 x 10.23 iron atoms per mole of iron. In this quantity, The number of iron atoms has a mass of

55.85 ⋅ g.

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<h3>HOW TO CALCULATE NUMBER OF MOLES?</h3>

The number of moles of a substance can be calculated by multiplying the molarity by the volume.

No. of moles = Molarity × volume

According to this question, 3L of a KBr solution are contained in a 0.4M.

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