What is the amount of hydrogen in g in the sample? vapor, Ask an Expert

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A.) Magnesium, an alkaline earth metal reacts with water producing hydrogen gas. If one decides to collect the hydrogen over water at 20 degrees celsius and the total amount of gas collected is 0.639 L with pressure of 1.11 atm, what is the amount of hydrogen in g in the sample? Vapor pressure of water at 20 degrees celsius is 17.5 torr.

Balance equation

Mg(s)+ 2H2O(l)-> Mg(OH)2(aq) + H2(g). THe mass of hydrogen collected over water is?

B.) Magnesium carbonate can decompose into magnesium oxide and carbon dioxide.

MgCO3(s)-> MgO(s)+ CO2(g)

If the has collected over water at 10 degrees celsius has a total pressure of 1.23 atm and volume of 1.563 L, how many grams of magnesium carbonate was decomposed? the vapor pressure of water at 10 degrees celsius is 9.2 torr.

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Category:- Chemistry
Reference No.:- M9483229

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