1.a) M N2=2*14=28
1 mol........28 g N2
x............56 g N2
[tex]x= \dfrac{56}{28} =2 \ moli[/tex]
M NH3=14+3*1=17
1 mol........17 g NH3
y............34 g NH3
[tex]y= \dfrac{34}{17} =2 \ moli[/tex]
b) 1 mol N2.........22,4 dm³
a.................4,48 dm³
[tex]a= \dfrac{4,48}{22,4}=0,5 \ moli[/tex]
1 mol NH3...........22,4 L
b......................4,48 L
[tex]b= \dfrac{4,48}{22,4}=0,5 \ moli[/tex]
P.S: 1dm³=1 L
c) 1 mol N2..........6,022*10²³ molecule
m...................9,033*10²³ molecule
[tex]m= \dfrac{9,033* 10^{23} }{6,022*10^{23} } =1,5\ moli[/tex]
1 mol NH3..........6,022*10²³ molecule
n...................9,033*10²³*10³ molecule
[tex]n= \dfrac{9,033* 10^{23}* 10^{3} }{6,022* 10^{23} } =1,5* 10^{3} =1500 \ moli=1,5\ kmoli[/tex]
2. a) 28 g N2 (1 mol)............22,4 dm³
x..............................67,2 dm³
[tex]x= \dfrac{67,2*28}{22,4} =84 \ g\ N_{2} [/tex]
b) 17 g NH3 (1 mol)............22,4 dm³
y..............................67,2 dm³
[tex]y= \dfrac{67,2*17}{22,4} =51 \ g\ NH_{3} [/tex]