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vampirchik [111]
2 years ago
8

Answer this if you can. 99% can't do this :OBut seriously help me out lol

Chemistry
1 answer:
Lana71 [14]2 years ago
8 0

Answer:

The first one

Explanation:

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How many particles of Na are there in 1.43g of a molecular compound with a Molar mass of 23g?
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Answer:

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Explanation:

Given parameters:

Mass of compound  = 1.43g

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Unknown:

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Solution:

To find the number of particles of Na in the compound, we need to obtain the mass of sodium from the total mass given;

          Mass of sodium  = \frac{molar mass of Na}{molar mass of compound} x mass of sample

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Now find the number of moles of this amount of Na in the sample;

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                       0.062 mole of substance  =  0.062 x 6.02 x 10²³ particles

                                                                     = 3.74 x 10²² particles

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