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Problem: The oxides of Group 2A metals (symbolized by M here) react with carbon dioxide according to the following reaction:MO(s) + CO2(g) → MCO3(s)A 2.85-g sample containing only MgO and CuO is placed in a 3.00-L container. The container is filled with CO2 to a pressure of 740. torr at 20.°C. After the reaction has gone to completion, the pressure inside the flask is 390. torr at 20.°C. What is the mass percent of MgO in the mixture? Assume that only the MgO reacts with CO2.

🤓 Based on our data, we think this question is relevant for Professor Roychowdhury's class at RUTGERS.

FREE Expert Solution
  • We can get the mass of MgO by calculating the moles of COreacted using the conditions provided which can be plugged in to the ideal gas equation
  • The mass of MgO will be divided by 2.85 g sample to get the mass % MgO
  • The reaction of Mg with COwill appear as

MgO(s) + CO2(g) → MgCO3(s)

  • Calculating for the moles COreacted, it will appear as:

Moles COreacted = moles COinitially - moles CO2  excess

  • Calculating for the moles of COinitally and excess using ideal gas equation (assuming COis the only gas in the vessel):
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Problem Details

The oxides of Group 2A metals (symbolized by M here) react with carbon dioxide according to the following reaction:

MO(s) + CO2(g) → MCO3(s)

A 2.85-g sample containing only MgO and CuO is placed in a 3.00-L container. The container is filled with CO2 to a pressure of 740. torr at 20.°C. After the reaction has gone to completion, the pressure inside the flask is 390. torr at 20.°C. What is the mass percent of MgO in the mixture? Assume that only the MgO reacts with CO2.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Gas Stoichiometry concept. If you need more Gas Stoichiometry practice, you can also practice Gas Stoichiometry practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Roychowdhury's class at RUTGERS.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl 2nd Edition practice problems.