When magnesium and oxygen combine to produce magnesium oxid there are 3 grams of magnesium and 1 gram of oxygen of all of the magnesium amd oxygen reacted how many grams of magnesium and oxide are produced?
2007-08-20 07:59:46 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
The equation is
2Mg + O2 >> 2 MgO
3g / 24.312 = 0.123 mole Mg
1 g / 32 = 0.0313 mole of oxigen
The ratio between Mg and O2 is 2 : 1
oxigen is the limiting reactant
The ratio between O2 and MgO is 1 : 2
1 : 2 = 0.0313 : x
x = 0.0626 mole MgO produced
Molecular weight = 40.3 g/mol
0.0626 mol x 40.3 g/mol = 2.5 g of MgO produced
2007-08-20 08:14:17 · answer #1 · answered by Dr.A 7 · 1⤊ 0⤋
2Mg + O2 == 2MgO
One mole of Mg will react with one mole of oxygen atoms = 1/2 mole of O2 gas.
Look up the molecular mass of magnesium and oxygen and you can see the ratyios of how they will combine.
2007-08-20 08:05:41 · answer #2 · answered by reb1240 7 · 0⤊ 0⤋