Gas Laws and Stoichiometry

[bluegirlbalance]

Magnesium burns in oxygen gas to produce magnesium oxide. What mass of magnesium will react with a 0.25 L container of oxygen gas at 80oC and 770 mmHg? :confused:



I need to use stoichiometry to set up the pronlem and PV=nRT to solve.

I have three possible solutions, but I don't know which one is the correct one. The solutions I have are .945 g, .418 g, and .124 g.

[dmoravec]

Have you done any work on this problem? If you show work we can help you through the problem. Do you have the equation of the reaction?

[Borek]

Use PV=nRT to calculate amount of oxygen.

Borek
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Stoichiometry calculator (http://www.chembuddy.com/?left=EBAS&right=equation-balancing-stoichiometry)
www.pH-meter.info/pH-electrode (http://www.ph-meter.info/pH-electrode)