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Dumas Method Quiz

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Questions and Answers

What method was developed in 1832 by J.B. Dumas for determining molar masses?

The Boyle Method
The Dumas Method (correct)
The Avogadro Method
The Dalton Method

What did J.B. Dumas measure to calculate the density of the gas in the Dumas Method?

Volume of the vessel
Pressure of the gas
Masses of vapors generated within a vessel (correct)
Temperature of the gas

What does the Dumas Method rely on as one of its assumptions?

The molar volume changes with pressure
The volume of the vessel changes with temperature
The gas behaves non-ideally
The gas behaves ideally (correct)

What allows the calculation of molar mass from the density of the gas in the Dumas Method?

Molar volume of the gas at a certain temperature and pressure (B) Signup and view all the answers

What happens if the hole is not punched in the cover before evaporating the sample in the Dumas Method?

The vapor formed does not experience atmospheric pressure (A) Signup and view all the answers

What is the purpose of punching a hole in the cover before evaporating the sample in the Dumas Method?

To ensure the vapor formed experiences atmospheric pressure (D) Signup and view all the answers

What is the significance of the mole in the context of determining molar mass using the Dumas Method?

It represents a measure of the number of particles (B) Signup and view all the answers

Why is it important for the gas to behave ideally in the Dumas Method for determining molar masses?

To ensure accurate calculation of molar mass (D) Signup and view all the answers

What is the role of the volume of the vessel in the Dumas Method for determining molar masses?

It affects the accuracy of the calculated molar mass (B) Signup and view all the answers

How does the Dumas Method utilize the density of the gas to determine molar mass?

By relating it to the volume of one mole of the gas (A) Signup and view all the answers

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