Being able to solve a problem from scratch increases the level of understanding in the subject and improves substantially your skills. Late homework will not be accepted. The lowest score will be dropped. The homeworks have to show original work and an appropriate understanding of the subject. Presentation counts and computer generated reports are highly encouraged.
Units have to be carried out all the way through the answer.
In other words, all numbers have to have units. Work with algrebraic expressions as fars as possible before final computations. Highlight results and answers. Create a cover page for each homework. This should include headings with the names of university, Chemical Engineering Division, course title, instructor, homework number, your name, semester, year, etc.