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When magnesium nitrate, Mg(NO3)2, is heated, it decomposes as shown.
2Mg(NO3)2(s) 2MgO(s) + 4NO2(g) + O2(g)
A student heats 2.966 g of Mg(NO3)2, which decomposes as above.


Calculate the total volume of gas formed, in cm3, at room temperature and pressure, RTP.


how do we do this i get till find the mol of mgno3 which is 2x10-2
Original post by dingding123
When magnesium nitrate, Mg(NO3)2, is heated, it decomposes as shown.
2Mg(NO3)2(s) 2MgO(s) + 4NO2(g) + O2(g)
A student heats 2.966 g of Mg(NO3)2, which decomposes as above.


Calculate the total volume of gas formed, in cm3, at room temperature and pressure, RTP.


how do we do this i get till find the mol of mgno3 which is 2x10-2

The balanced equation goves you the ratio of moles of reactants and products.
Convert the moles of product gases into volume using PV=nRT
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Pigster
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Original post by charco
The balanced equation goves you the ratio of moles of reactants and products.
Convert the moles of product gases into volume using PV=nRT


Or at RTP, just use 24.0 (it is an OCR A question and the data book says that they can).

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