Just made this account , because i want to be sure if i solved this exercices correct

Would really appreciate it if somebody could just point me in the right direction if i got any wrong

N2 + 3 H2 = 2 NH3

N2 = 125 grams 4.5 moles

H2 = 32 grams 48 moles

NH3 = 36.5 grams 4.2 moles

Rendement (=output according online translator)(NH3) = 51% >>correct??

2 C6H6 + 15 O2 = 12 CO2+ 6 H2O

C6H6 = 10 grams

H2O = 6.9 grams >> correct??

Volume CO2 = 103 liters >>correct??

C2H6 = C2H4 + H2

C2H4 = 30 liters

rendement (C2H4) = 67% >> correct?