The way I understand it, their is 12 assingments for this semester. They take you best 10 marks from those 12 assingments and this counts towards 10% of your final mark. So you can afford to bomb 2, but I really don't see them getting any easier.
The program is really strict on decimal places and significant figures which is why a lot of people last week could not understand why they kept getting 3/5.
In all honesty I feel really sorry for people in the course who did not do HSC chemistry or an equivalent
I got 88 and started in higher chem but all the phsyics in higher chem scared me away.