# Monthly Archives: October 2016

## Please print the review material and bring the paper copy and your dictionary to October 30 class

• Please bring the paper copy of the review material and your dictionary in addition to your text book to the next Sunday class.  We will go over the review material in the next Sunday class together.
• The students should complete the homework of Lesson 1, 2 and 3 and submit the homework in the next Sunday class.

## Summary of October 16 Chemistry SAT class and homework

For the student who missed the class, you must complete Chapter 2 Review Questions on page 56 to 57, Question #9 through #14.

Chapter 2

Question #9 (page 56):

Derive relationship:  Density  MW (gas molecular weight) at STP

……..

Density  =  Mass / Volume,  PV=nRT,   n = Mass / MW

PV=nRT   →  n/V = P/RT

n/V =  (Mass / MW ) * (1/V ) =  (Mass / V)  *  (1/MW ) = Density / MW

n/V = P/RT  = Density / MW

Density = (P/RT ) * (MW)

For all five gases, the P and T are the same, i.e. (P/RT ) is a constant, at STP (273.15 K; 1 atm or 760 Torr),

Density  MW           (P/RT ) is a proportionality constant in this case

Question #10 (page 57):

Using relationship: V = nR  * (T) * (1/P)            (from PV=nRT)

V ↓, when T ↓,

V ↓,   when P↑, i.e. (1/P)↓,

Question #13  (page 57):

Try using elimination method

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Chapter 3

Study page 59 to page 61, staring

• Subatomic particles
• Isotopes
• The Born Model of the Atom

Practice

1.  Solve the Problem on page 61.
2.  Solve Question #1 in the Chapter Review Questions on page 72

Watch video: Charge of an Electron: Millikan’s Oil Drop Experiment

## 2016 漢字文化節: 百字文學獎 / 中文生日賀卡創作比賽通知

10／2上课时征集报名，有兴趣报名参加“百字文学奖”和“中文生日贺卡创作比赛”的学生，请将姓名email给我（蔚健老师）。我会将報名表发给你。

“百字文学奖”:

1) 邀請參加比賽學校以外之社會賢達人士擔任評審。

2) 文章創意50%、語文表達30%、對華人傳統文化的應用20%

3) 寫作比賽成績預計於12月公布。

“中文生日贺卡创作比赛”：

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From: 新英格蘭中文學校協會 <neacs2016@gmail.com> Sent: Thursday, September 29, 2016 7:27 PM To: Subject: 2016 漢字文化節:百字文學獎 / 中文生日賀卡創作比賽