Question (SPM style)
Ethanol, CβHβ OH, undergoes complete combustion in excess oxygen.
The equation is:
CβHβ OH + 3Oβ β 2COβ + 3HβO
Given that the relative molecular mass, Mr, of ethanol is 46, calculate the mass of carbon dioxide produced when 9.2 g of ethanol burns completely.
[3 marks]
Given: Ar: C = 12, H = 1, O = 16.
π‘ Show your working clearly! Donβt just write the final answer.
Ethanol, CβHβ OH, undergoes complete combustion in excess oxygen.
The equation is:
CβHβ OH + 3Oβ β 2COβ + 3HβO
Given that the relative molecular mass, Mr, of ethanol is 46, calculate the mass of carbon dioxide produced when 9.2 g of ethanol burns completely.
[3 marks]
Given: Ar: C = 12, H = 1, O = 16.
π‘ Show your working clearly! Donβt just write the final answer.
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goodnight everyone, have a good rest and all the best for tomorrow! πβ¨
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41 days left (5 minggu 6 hari)
If you donβt understand, no worries. Try and be like a sponge, keep on absorbing. Try to understand little bit pun should be okay. As long as you keep on continuing buat soalan, insyaAllah nanti akan faham. - by someone that hopes you can do it
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Q1. What is a polymer?
Apakah itu polimer?
Apakah itu polimer?
Anonymous Quiz
4%
A. A small molecule that cannot react
95%
B. A large molecule made up of many repeating monomer units
1%
C. A metal that conducts electricity
1%
D. A type of food your mother tells you not to waste π
β€4
Q2. What is a monomer?
Apakah itu monomer?
Apakah itu monomer?
Anonymous Quiz
98%
A. A small molecule that can join with other similar molecules to form a polymer
0%
B. A finished plastic bag
0%
C. A mixture of metals
1%
D. The student who studies alone in the corner π
Q3. Which of the following is a natural polymer?
Antara berikut, yang manakah polimer semula jadi?
Antara berikut, yang manakah polimer semula jadi?
Anonymous Quiz
20%
A. Polyethene
4%
B. PVC
68%
C. Cellulose
8%
D. Polystyrene
Q4. Which of the following is a synthetic polymer?
Antara berikut, yang manakah polimer sintetik?
Antara berikut, yang manakah polimer sintetik?
Anonymous Quiz
4%
A. Starch
2%
B. Protein
16%
C. Natural rubber
77%
D. Polyethene
Q5. Which monomer is used to produce polyethene?
Monomer manakah digunakan untuk menghasilkan polietena?
Monomer manakah digunakan untuk menghasilkan polietena?
Anonymous Quiz
84%
A. Ethene
6%
B. Ethanol
5%
C. Ethanoic acid
5%
D. Methane
β€1
Q6. What type of polymerisation produces polyethene?
Apakah jenis pempolimeran yang menghasilkan polietena?
Apakah jenis pempolimeran yang menghasilkan polietena?
Anonymous Quiz
30%
A. Condensation polymerisation
66%
B. Addition polymerisation
2%
C. Neutralisation
2%
D. Polymerisation through pure academic suffering π
Q7. Which functional group is present in an alkene monomer before addition polymerisation?
Kumpulan berfungsi manakah terdapat dalam monomer alkena sebelum pempolimeran penambahan?
Kumpulan berfungsi manakah terdapat dalam monomer alkena sebelum pempolimeran penambahan?
Anonymous Quiz
11%
A. CβC single bond only
86%
B. C=C double bond
3%
C. βCOOH
1%
D. βOH only
Q8. Which polymer is commonly used to manufacture water pipes?
Polimer manakah biasanya digunakan untuk membuat paip air?
Polimer manakah biasanya digunakan untuk membuat paip air?
Anonymous Quiz
97%
A. PVC
1%
B. Starch
1%
C. Protein
1%
D. Cellulose
Q9. Which of the following is a natural polymer found in rubber trees?
Antara berikut, yang manakah polimer semula jadi yang terdapat dalam pokok getah?
Antara berikut, yang manakah polimer semula jadi yang terdapat dalam pokok getah?
Anonymous Quiz
17%
A. Polypropene
78%
B. Natural rubber
4%
C. Polyethene
1%
D. PVC
Q10. What is vulcanisation?
Apakah itu pemvulkanan?
Apakah itu pemvulkanan?
Anonymous Quiz
2%
A. Heating plastic until it disappears
95%
B. Adding sulphur to natural rubber and heating it to improve its properties
2%
C. Mixing rubber with water
1%
D. Making rubber wear sunglasses
Q11. Why is vulcanised rubber stronger than untreated natural rubber?
Mengapakah getah tervulkan lebih kuat daripada getah asli yang tidak dirawat?
Mengapakah getah tervulkan lebih kuat daripada getah asli yang tidak dirawat?
Anonymous Quiz
89%
A. It contains cross-links between polymer chains
1%
B. It contains more water
2%
C. Its polymer chains disappear
9%
D. It has been emotionally supported by sulphur
Q12. Which polymer is commonly used to make non-stick coatings for cooking pans?
Polimer manakah biasanya digunakan sebagai salutan tidak melekat pada kuali?
Polimer manakah biasanya digunakan sebagai salutan tidak melekat pada kuali?
Anonymous Quiz
76%
A. PTFE
11%
B. Starch
5%
C. Cellulose
8%
D. Natural rubber
Q13. Which statement about synthetic polymers is correct?
Pernyataan manakah yang betul tentang polimer sintetik?
Pernyataan manakah yang betul tentang polimer sintetik?
Anonymous Quiz
24%
A. All synthetic polymers are biodegradable
7%
B. They are always produced by living organisms
68%
C. Many are durable and may persist in the environment
1%
D. They disappear as soon as they touch water π
β€2