Tuesday, January 25, 2011

Tuesday, January 25, 2011

1/25/11

Announcements - The first of quiz in this unit will be his Thursday.

Today In Class - Today in class we started by picking up some new pages for our notebooks. We then went over the lab from yesterday that was supposed to be finished for today. Mr. Paek went over some of the problems and also made sure that everyone knew what they were doing. Once we finished going over the lab, Mr. Paek showed us how to find the molecular mass of a compound. For example, the compound NH4Cl . The name of this compound is ammonium chloride. To find molecular mass of a compound, you start by finding the atomic mass of each element. In ammonium chloride, N has 14. H is one, but since there are four H's, you would really have four H. There are also 35.5 Cl. After you have found all of this, you add it all together. Once you have added it all together, you will end up with 53.5 g/mol. After we were showed molecular mass, we went over conversions one more time.

Homework - The homework for today is every problem on both page one and page two. On page three, you only have to do problem one both a and b, and problem two both a and b. On page four, you have to do all of problem three, four, and five. On page five you have to do problem one, letters e, f, g, h. The last page you have problems to do for homework is page six. You have to do problem two, letters d, e, f, and g.

THE NEXT SCRIBER WILL BE.................... yassine

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