Group 27

Group Name : 27

Group Members :
ELYSIA LIM LEYON WONG YUNG CHEN THUBTEN OSEL LIM MONICA MEGAWATI JEFFREY PRASETIO CHAPPEL LUCY JEAN

1.

As acetone is an organic solvent. styrofoam is soluble in organic solvent such as acetone as acetone act as a lubricant between the polymers chain, allowing them to slide around each other. This cause the release of air bubble within the styrofoam, which makes the styrofoam denser after the evaporation of acetone.

2.

a. HDPE is stronger than LDPE.
LDPE does not have sufficient strength to be use for surgical gloves.
b. Molecules of HDPE must line up in a way to produce the required strength.
For flexible-wire, the linear HDPE must be in thin liner for it to be flexible.

3.

When we try to stretch a plastic bag, the weak but extensive dispersion forces allow the molecule to slip pass one another allowing the plastic bag to stretch and neck . the molecules aligned parallel to each other and in the direction of the pull.
when pull a piece of paper, the paper is torn.

4.

a. strong, light weight un-reactive, easy to mould.
b. PMMA, transparent, flexible hydrophilic, unreactive
c. Hard- rigid, last for years, give good clarity to vision
Soft- cheaper, can be used for one day then disposed. more comfortable.

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Group 27	Group Name : Group 27
Group Members : Lucy Chappel, Monica Megawatti, Leyon Wong, Osel Lim, Jeffrey Prasetio, Elysia Lim
1. Cloning the dog breed will get an exact copy of it’s genetic material from the donor itself. Hence whatever heredity defects that the donor has or mutations it has inherited will be the same for the clone cell. E.g. cancer cells –> if donor has a susceptible risk of getting cancer, the clone would also inherit it.
2. One advantage is that genetically modified corn is less susceptible to disease and pesticides. Another advantage is the prevention of famine which solves the immediate problem. One disadvantage is it could damage your current crops as is could alter the ecosystem. Another disadvantage is makes you in debt to the other nation.
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[158]	Group Name : [112]
Group Members : [113]
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[158]	Group Name : [112]
Group Members : [113]
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[158]	Group Name : [112]
Group Members : [113]
1. [114]
2. [116]
3. [118]
4. [119]
5. [120]
6. [164]
7. [165]
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Group 27	Group Name : 27
Group Members : ELYSIA LIM LEYON WONG YUNG CHEN THUBTEN OSEL LIM MONICA MEGAWATI JEFFREY PRASETIO CHAPPEL LUCY JEAN
1. a. C6(H2O)6= C6H12O6 c. No. Different isomers have different chemical structure, giving different sweetness
2. Chemicals are building block of life, everything we eat will contain chemicals.
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Group 27	Group Name : group 27
Group Members : Elysia Lim Lucy Chappel Monica Megawati Osel Lim Jeffrey Prasetio leyon wong yung chen
1. One carbon atom can differ from another in the number of neutrons and the number of electrons. 3 ways which carbon differ from uranium- their number of protons. their number of neutrons their number of electrons their chemical properties.
2. The 14 and 15 is the mass number of N which is the total number of protons and neutrons in an atom. N15 has one more neutrons than N14. They have the same number of protons and electrons.
3. a) 94 b) Neptunium(Np) 93, Plutonium(Pu) 94 c) 86 protons
4. E-fuel rods D- cooling water into the core B -cooling water out of the core A-control rod assembly C -control rods
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Group 27	Group Name : group 27
Group Members : Elysia Lim
1. One carbon atom can differ from another in the number of neutrons and the number of electrons. 3 ways which carbon differ from uranium- their number of protons. their number of neutrons their number of electrons their chemical properties.
2. The 14 and 15 is the mass number of N which is the total number of protons and neutrons in an atom. N15 has one more neutrons than N14. They have the same number of protons and electrons.
3. a) 94 b) Neptunium(Np) 93, Plutonium(Pu) 94 c) 86 protons
4. E-fuel rods D- cooling water into the core B -cooling water out of the core A-control rod assembly C -control rods
5. [276]
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7. [280]
8. [282]
9. [284]
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