Ethane is supplied at the rate F with oxygen at the rate W and leaves the following products CO2, H2O, O2, C2H6 and H2 at the rate P. How many independent element balances are possible?

Ethane is supplied at the rate F with oxygen at the rate W and leaves

1.	Ethane is supplied at the rate F with oxygen at the rate W and leaves the following products CO₂, H₂O, O₂, C₂H₆ and H₂ at the rate P. How many independent element balances are possible?
A.	t1
B.	t2
C.	t3
D.	t4
Answer» D. t4