You should take 3450:312 Linear Algebra to satisfy the advanced math elective requirement for the Chemical Engineering plan of study. Then the following are required:
3460:209 Computer Science I 
3450:307 Fundamentals of Advanced Mathematics
3450:421 Advanced Calculus I
3450:427 Applied Numerical Methods I
3450:428 Applied Numerical Methods II
3450:436 Mathematical Models
3470:461 Applied Statistics 
One of 3450:425 Complex Variables or 3450:422 Advanced Calculus II

Total: 26 Additional Credits

Minor: If you take 3450:312 Linear Algebra to satisfy your advanced math requirement, then only
two additional approved electives from mathematics, statistics or computer science are required.