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3 years ago

Question 6

Chemistry

1 answer:

crimeas [40]3 years ago

8 0

Answer: There are $10.5\times 10^{23}$ formula units in 1.75 mol sample of NaCl.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

1 mole of NaCl contains = $6.023\times 10^{23}$ formula units

Thus 1.75 mol of NaCl contains = $\frac{6.023\times 10^{23}}{1}\times 1.75=10.5\times 10^{23}$ formula units

Thus there are $10.5\times 10^{23}$ formula units in 1.75 mol sample of NaCl.

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The subscripts in the formula represent the atomicities, that is the number of atoms of each element in each part of the formula.

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