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dusya [7]
3 years ago
12

a sample of salt has 1.74 moles of sodium chloride. how many formula units of the ionic compound are in the sample?

Chemistry
1 answer:
steposvetlana [31]3 years ago
4 0

Answer:

A sample of salt has 1.74 moles of sodium chloride. how many formula units of the ionic compound are in the sample?

Explanation:

Given, 1.74 moles of NaCl.

Since one mole of NaCl consists of --- 6.023 * 10^2^3 formula units.

Then, 1.74mol of NaCl contains how many formula units of NaCl?

1.74 mol x \frac{6.023x10^2^3}{1 mol} \\=10.5x10^2^3formula units.

Hence, the given sample has 10.5x10^23 formula units.

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Answer : The final volume of gas will be, 26.3 mL

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.974 atm

P_2 = final pressure of gas = 0.993 atm

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Now put all the given values in the above equation, we get:

\frac{0.974 atm\times 27.5 mL}{295K}=\frac{0.993 atm\times V_2}{288K}

V_2=26.3mL

Therefore, the final volume of gas will be, 26.3 mL

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