Chemistry can be a challenging subject. We do know however that any student in Chem 105N can at this point earn an A grade. The best advice is to commence with a good start of regular study and putting enough time and effort in to the class. That is studying for 2 hours for every 1 hour of lecture. With that study requirement in mind, how many hours of study should you invest in the class per week? FYI: we have class from 5.457.00pm so that is 75 mins each day. We have that class 2 times per week so 752=x mins or x hours. Now double that to find out the number of hours that should be spent in study each week