Respuesta :
2.9g N2, 0g Mg, 3.07g Mg3N2 are present.
Equation
3Mg+N2-->Mg3N2
moles of N2 needed= (0.0913mol Mg)(1molN2/ 3molMg)
= 0.0304mol N2
moles of N2 excess=moles of N2 - moles of N2 needed
=0.1388mol N2- )0.0304 mol N2
=0.1034 mol N2
mass of N2= (0.1034 mol N2)(28.02g N2/ 1molN2)
mass of N2 =2.9g N2
moles of Mg= 0mol
mass of Mg = (0mol)(24.31g Mg/ 1mol Mg)
mass of Mg = 0g
mass of Mg3N2 = (0.0304mol Mg3N2)(100.95g Mg3N2/ 1molMg3N2)
mass of Mg3N2= 3.07g Mg3N2
Why is this reaction called a combination?
A combination reaction is a chemical process in which two or more elements or molecules combine to form new compounds.
What is a combination reaction example?
Ba (s) + F2 (g) --> BaF2 is an illustration of a pair of elements reacting with each other (s)
learn more about combination reaction here
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