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Katyanochek1 [597]
2 years ago
6

Which of the following is the correct formula for sodium oxide? NaO2 Na­O Na2O3 Na3O4 Na2O

Chemistry
1 answer:
olga nikolaevna [1]2 years ago
7 0
Since Na has a 1+ charge and O has a -2 charge, by reversing the charges and placing them as subscripts for the other atoms the formula is Na2O1 or simply Na2O.
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We have that the molecular weight (3sf) of the compound (g/mol)

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From the question we are told

A solution made by mixing 20.0 g of a non-volatile compound with 125 mL of water at 25°C has a vapor pressure of 22.67 torr. What is the molecular weight (3sf) of the compound (g/mol).

Generally the equation for the Rouault's law is mathematically given as

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22.67=23.8*\frac{\frac{12.5}{18}}{\frac{125}{18}+\frac{15}{m}}\\\\\6.95+\frac{15}{m}=7.29\\\\\frac{15}{m}=7.29-6.95\\\\m=\frac{15}{0.34}\\\\m=44.11g/mol

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