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mHCl=36,5u
mH2=2u
2Na + 2HCl---->2NaCl + H2
2*36,5g HCl------2g wodoru
146g HCl----------xg wodoru
x=4g H2
Wydzieli się 4g H2 (wodoru)
2.
mNH3=17u
mN2=28u
mH2=2u
3H2 + N2---->2NH3
3*2g H2-----28g N2
xg H2--------5g N2
x=1,07g H2
W nadmiarze użyto H2 (wodór)
28g N2-----2*17g NH3
5g N2-------xg NH3
x=6,07g NH3
Powstanie 6,07g NH3 (amoniaku)