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one particular

MODUL BIMBINGAN EMaS 2007

Module you

JABATAN PELAJARAN TERENGGANU

BIMBINGAN EMaS TAHUN 2007

BIOCHEMISTRY

FORM 4

MODULE 1

THE FRAMEWORK OF THE ATOM

CHEMICAL FORMULAE AND EQUATIONS

PANEL

SOBRE. CHE MALEK HJ. MAMAT

TN. HJ. JAAFAR BAJURI

TN. HJ. WAN RUSLI WAN SULAIMAN

EN. ZULKIFLI ABDULLAH

PN. HJH. NOR PAIZAH HASSAN

–

–

–

–

–

SBPI BATU RAKIT, KUALA TERENGGANU

SM SAINS SULTAN MAHMUD, K. TRG

SMKA SHEIKH ABD. MALEK, K. TRG

SMKA TOK JIRING, KUALA TERENGGANU

SM TEKNIK BESUT, BESUT

a couple of

MODUL BIMBINGAN EMaS 3 years ago

Module you

SECTION A

1

Chart 1 reveals the heat against time of solid element X once heated. Compound X can be an organic mixture and burnable.

Temperature as well as 0C

T

Q

3rd there’s r

80

P

Time/s

35

360

GRAPH 1

(a) Draw a diagram from the set-up from the apparatus used to determine the melting stage of compound X.

[ 2 marks]

(b) (i)

State the melting stage of compound X

.................................................................................................................................. [ 1 mark]

MODUL BIMBINGAN EMaS 2007

3

Module 1

(ii) What is the state of matter of substance X for:

PQ:................................................................................................................................ RS:............................................................................................................................... [ 2 marks]

(iii) Explain so why the heat remains frequent from Q to 3rd there’s r?.................................................................................................................................................................................................................................................................................. [ 2 marks]

(iv) State how a movement of substance Times particles improvements between R and S i9000 during heating.

……………………………………………………………………………………….. [ 1 mark]

(c) In the event that substance Times cooled for the room heat without mixing, draw the graph of temperature against time obtained.

[ 2 marks]

(d) Predict the substance Times

................................................................................................................................................ [ 1 mark]

MODUL BIMBINGAN EMaS 2007

a couple of

4

Component 1

Lactic acid is definitely an acidity produced in dairy by bacterias, causes a sour taste. Table two shows the proportion composition simply by mass of each and every element in lactic acid.

Aspect

Percentage

Co2

40. 00

Hydrogen

6. 67

O2

53. thirty-three

TABLE 2

(a)

Based on the information above, calculate the empirical mixture of lactic acid solution. [Relative atomic mass: H = 1; C = 12; O = 16 ]

[ three or more marks]

(b)

Family member molecular mass of lactic acid is definitely 90. Determine the molecular formula of lactic acid.

[ a couple of marks]

(c)

Determine the number of hydrogen atom in 1 mol of lactic acid? [ BIST DU = six. 02 Г— 10 twenty three ]

(d)

Calculate the number of moles of 5. 5 g lactic acid.

[Relative atomic mass: H = 1; C = 12; O = 16 ]

[ one particular mark]

[ 1 mark]

five

MODUL BIMBINGAN EMaS 3 years ago

(e)

Component 1

Vinegar or ethanoic acid has a similar scientific formula with lactic acid. (i)

Given that three substances of ethanoic acid have the same mass while two elements of lactic acid. Precisely what is the family member molecular mass of ethanoic acid?

[ you mark]

(ii) Identify the molecular formula of ethanoic acid.

[ a couple of marks]

3

Table 3 displays formula of four ions.

Identity of ions

Formula of ions

Silver ion

+

Ag

Zinc ion

Nitrate ion

Chloride ion

NO3-

Cl-

2+

Zn

TABLE 3

(a) Write down thier formulae for each and every compound below:

(i)

Sterling silver nitrate

:.......................................................................................................

(ii)

Zinc chloride

:.......................................................................................................

(iii)

Silver chloride

:...

19.08.2019

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