No it isn't. Its gonna be based on what you did in Year 8....Well yes... but the HSC will be primarily based on the HSC course right?
.please refrain from derailing this thread. If you want to talk about a specific topic or whatever to someone else, please do it via PM or have the conversation somewhere else as we want the marathon running smoothly[/COLOR][/B]
I have made some changes so you can see what it might look more like (not complete, but still).Polylactic acid (PLA) is a thermoplastic polymer that is is derived from renewable resources like corn starch and sugar cane. Most plastics are polymers of nonrenewable petroleum reserves. Plastics derived from biomass (e.g. PLA) are known as “bioplastics”.
PLA is biodegradable and has similar properties to polypropylene (PP), polyethylene (PE), or polystyrene (PS), and its production is compatible with existing industrial equipment used for traditional polymer synthesis. This makes PLA production relatively cost efficient. Accordingly, PLA is the second highest bioplastic produced by volume, only behind thermoplastic starch.
Uses of PLA include plastic films, bottles, and biodegradable medical devices (e.g. screws, pins, rods, and plates that are expected to biodegrade within 6-12 months). For more on medical device prototypes (both biodegradable and permanent) read here. PLA constricts under heat, making it suitable for use as a shrink wrap material. Additionally, the ease with which PLA melts allows for some interesting applications in 3D printing (namely “lost PLA casting” - read more below). In contrast, its low glass transition temperature (include a temperature?) limits its use at high temperature due to deformation.
sourced from: https://www.creativemechanisms.com/blog/learn-about-polylactic-acid-pla-prototypes
You haven't balanced the chemical equation. It should be: 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)Reactive Metal + Liquid Water → Metal Hydroxide + Hydrogen Gas
E.g. Na(s) + H2O(l) → NaOH(aq) + H2(g)
^Where does the extra H come from?
Thank youYou haven't balanced the chemical equation. It should be: 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
Polystyrene is a versatile plastic used to make wide variety of consumer products such as tool handles an plastic furniture. As a hard, solid plastic, it is often used in products that require clarity, such as food packaging and laboratory ware. When combined with various colorants, additives or other plastics, polystyrene is used to make appliances, electronics, automobile parts, toys, gardening pots and equipment and more.Assess the use of polystyrene and a named biopolymer in terms of their properties, with references to the statements made in this blog.
Mate i'll give u a tip. Ask questions that you don't know the answers to. No one enjoys answering the bullshitty rote learning 6-7 markers. For these you just pre-prepare responses and regurgitate in the exam. In the marathon ask questions like calculations or harder 1-4 markers and people will be more inclined to answer, me included.Question: Identify ONE radioisotope used in the fields of medicine AND industry and explain their use in terms of properties. (6 MARKS)
Now please continue this as we need to prep for our half yearlies
idk if u are trying to insult me....or a serious recommendation....Mate i'll give u a tip. Ask questions that you don't know the answers to. No one enjoys answering the bullshitty rote learning 6-7 markers. For these you just pre-prepare responses and regurgitate in the exam. In the marathon ask questions like calculations or harder 1-4 markers and people will be more inclined to answer, me included.
Bothidk if u are trying to insult me....or a serious recommendation....
Dead serious. I wanna participate but fuck me you ask boring questions. We don't pick chemistry because we like fluffy 6-7 markers.idk if u are trying to insult me....or a serious recommendation....
lmao thanks. it's been a while though hahaan increase in oxidation state --> the substance is oxidised (0 to +2)
a decrease in oxidation state --> the substance is reduced (+1 to 0)
if you have 0 to +2, this shows an increase in positivity (decrease in negativity i.e. lost electrons hence oxidation)
haha truelmao thanks. it's been a while though haha