1979-02-24 — Page 26

買二第張七第日八十月正年未己曆夏

WAH KIU YAT PO

報日僑華

六期星 日四廿月二年九七九一醫公年八十六國民華中,育教化女

趱外

華僑文化

後,滿估計會人士被賞,因此蔬&世門人習號台業,進步神湖

·趙世光師生國畫巡迴展 加拿大四大學舉辦

廻

展辦

該出油上有雞群。故此,卻越去年六月,他灣區女戰併進委員會主號 「鐵塔入門油畫,為古

鄭家大當豐順間,如做及主辦「中國護」中之各項中國戴爾活動,那一種觀點

「除、抖業、記俳、費用等,則均由主称类榈首資,被一官揚中國藝術寫作與研究,單月流時 一,亦將侩排於澳月份在該大陸中展出。他全部作品潘欣賞品;而一切滩,渡商作,中國歌誕 一,高出此光對生鼎將「風潑熱圖畫聯展」。此外,侃君愛來頓大的方改於法。棍有初警指挥 :“在沙省方案:亦已有沙化格通大巫及破 娜大展,延期在中间把洗,茲驚得研究,際學 開幕時定熱間氣氛。就且於出後,參衚濟盛洛亞前,需獲高地交就說雄縣,演奏與現場创作等。 此作品參加他时需燹之師生区:趙世光、陳健、何賢、劉翠設計,絲印雄等。

山水城大亨校長射傑把出。當時並有中國留學生舞獅與圓,維具府加一身載伴游,獨奏之战

WESTMONREAL

儀、雷渕、王之等示。

香港浸會學院

校外進修部與樂藝中心

春季課程三月中旬開始

【基督教主

恩

灣青社

姜節辦主

|台

灣考察團

維古华台灣考 就三月廿九日青防

(右)花卉草虫〔左)荷岛(糖庫作

一書龍索取及海問。經理

「母子猴」李薇作“一纵兵出博雅量取

個課程:院校外網候消散。外文具園:有英、寫作等。欲獨守拙,阿 校外進 ̈而會合一般花車電腦業人士,物熱義,預實法,欠发

| BASIC SYS 竹- 物業管理,凌魚群,祂難宮、關空

年異女參加。恩記太

心

祿山流水」胡宇基作

六大姊說,前年來造就

團體奇,辦入台證

= PROGRAMM|從治;中國畫浬,商業

ING COBOL 漢诙設計、隆雄傳建

PRAMMENG*|*

十锗股健K!,八八九 雄與維愴加,羅榮 財汴坐。成立段報名參 迎,現春拳課程, 〇〇及香港

照片,我特角缵行觀察

「眷之巖」胡宇基作

出版品大会堂八

風熱·朗起朝名。人七三四七索取表格。

明路

路德會青年管樂團

整明精舍佛學講座

兩法師在大會堂

今講兩經之總義

蜂!!

明在摩士公園演奏

「龍行音樂演奏會,有認識的朋友。 張a

月四日下午后持正常行為與麥館張區元,在四開麥爭樂器行代古

〔风期日)下午三時起一場正公開和團員

三月四日合辦粵曲演唱會 聖保祿中學與一廬粵曲會

「對純馬揚主流A些水亞跑馬地供水均可在說站,另一號及十九號巴士 太號,個敦這回天國號,正魔道六〇號安 大 「人物]作

·劉秀娜,某些位等唱家,六推出中,五小子『做開」『黑校財 *ň國心,劉博。大部分數平洋、市政粤曲狁唱會原疵人。而目 似括:数接,是任二册一風賞北侧,舉重區,姚正珠,張形

【欠我癍术学仳玩

·貔如止粹珠功在, 陈群仁水染。

宀 番椒 ] 梁澤斌兄八秩榮 醬就區開她太長, 五勒蝘號訪風雨!

唐微圈中忠心友, 危永義照人。

嗚醮虎鬥貓快靚; 被封 中换神腿而卷,夫蟎州塔兹进

戊午除夕.. 岑東明

·巴卡歲朝

豬無花略干支家世道子絲發。

陳介风

興翠品

(械)

山外山楼 陳介風

澳君朶選少年進。

1979

中學會考試題預習專欄

化

晶

+)

“明德出版社朱宏林提供資料

Chemistry (20)

Solution to

(a) Molecular mass of CO,

woofemales of C0,

obtained

648

22400

=0.00

maes of earhonin 20.57g of Z.

smass of carbon in C0,

obtained on combus

-0.02 mol x12g mal

Molecular mass of wa

mass of hydrogen în 0.37g of Z

#mass of hydrogen in water

vapour obtained on

combustion

05盒

uxygen in 0.37g

of Z ➡(0.37-0,24–0.

-0.082

Now, malar ratio of C÷1:0 "0.24 20.05-07 08

16

=0.02;0,05:0.005

Hence,

the empirical formula of 7 ie C2ll 0.

(h) Masa

f 1 mole

224.00 560

the relative molecular mass of 2 is 74.

(c) Let the molecular Formula

for Z. ho (WH000

Then,

relative nolécular

=nx (12x4+1×10+16x1}

740 #74(as found in (b))

Hence, the molecular formula for Z、a Cen

(d) The homologous" seriea

The possible isomers are

hutano1c01:

ropaimTeal

(vi

2-methyl-propan-2-0

The equation is

(E) According to the equation C4H100+602=4C0g+5]20

(or 74g)

Vol. of

required

Solution to 0.29

(a)(1) · · Ag*(aq)+C1"(ng),

AgC1(8)

(1) The flat portina

indicates that the amount of precipitate formed remaine constant and this is because all the chloride ions has been used up in forming the precipitate.

métallic chloride in: Aem2 of solution:

*1000*0

=0.001

From the graph it is seen that the volume

OfION silver nitrate solution required is 3cm

According to the equation

Ag*(nq)+£1TM (nq) -

ABCI(8)

No. of moles of Cl in tem? 2 solution no, of moles of silver ions sno. of moles silver

nitiate required. for complete: precipitation

(b)(i)

=0,003

From the resulté in (111) and (iv), it is seen that 0.001 moles of metallic chloride *provide 0,003 moles.

of chloride fons.⠀⠀ Therefore y there are 3 moles of chloride ions in 1 mole of metallic chloride. The ionic charge is

+3.

The farmù) for its sulphote is M2(SO, )3

Add AgNiz solution, a

acidified with dilute HNU2, separately into two aqueous s solutions (1) The one, cmtainin

precipitate, Ag*(aq) + Itaq).

(E)

(2) The one containing

chloride ions wil! Rive white precipitate

Each of the anlids is mixed with some aqueous sodium hydroxide and the mixtures are then

heated.gently.

(1) There will be no

obvious changes if the solid is. sodium sulphate.

gas, detected with its

(2) Ammo

characteristic

amel will be given off if the solid is ammonium sulphate.

NH *(aq)+0H(aq)

• NHz (5)+H, 0(1)

(111) Each of the solida is

added to some dilute sulphuric acid and the mixtures are

- warmed gently, if

necessary,

(1) The solid is

-copper(11)oxide

if it dissolves slowly to give a pale-blue solution, Cu1+ig $0

(2) The solid is.

iron(II) sulphide if it dissolves with

effervescence and the gas evolved has a

characteristic. smell of rotten "egg", i.e. hydrogon. suplhide. FeS+Hg80n

(iv) Pass the two gases

separately into acidified potassi112 permanganate solution.

(1). The gas which

decolourize the purple solution 18 propene.

(2) The gas which turn

tution

colourless is propane.

Each of the liquide ta nixed with some actdified potassium dichromate solution. and the mixtures are heated under reflux. (1) The one which

can turn the solation from.... orange to green. is methanoic acid as it has certain reducing power. (2) The one which

the

lation is- ethanole acid,

Solution to 9.30

(a) (i) A ja copper;

is anhydrous

capper(II)sulphate

copper(11) sulphate:

salution;

copper(11)hydroxide

日真

copper(II)carbonate

F is copper(II) oxide. (11) Gas G is sulphur

ioxide,

(111) (1) Cu+28,50%

Cu$0 +2H20+802 (2) Cu80 +2N#0L

|_ Cu {0} }, ( 8 ) +Na

(3) Cu(OH), (?)

(A) CuSOı +2NaHCO

CuCiz (5)+Na550, +]Ig0+C02 (5) cuco (a)-

The two gaseous

reagents are carbon monoxide and hydrogen,

(vi) Cu(Off),( 8 ) + 4 NII ̧ ( » q )—

Cu(NWㄢ)a*+2

The formulae a

WII, XI, YII, and

respectively.

Wl,: 4 honded pairs; 3. bonded pairs. and 1 lone pair

YH 2 bonded pairs

and 2 Tone pairs; 1 honded pair and 31one pairs,

是

hond In plane

hond going hehind the paper. bond going of the paper.

Lone pair.

tetrahedral shapest

XH: Pyramidal in

-shape

20;

angular in shape; linear in shape

The order is;