Queenroot
I complete the Squar3
ur rudethat's so rood. i wouldn't refuse advice cos you didn't get a B6.
I would refuse advice cos you're square.
ur rudethat's so rood. i wouldn't refuse advice cos you didn't get a B6.
I would refuse advice cos you're square.
needs questions spoon fed to himThe joys of doing a bio paper and answering the chem questions you guys put up
more pls
explain protein synthesis from chemical viewpointThe joys of doing a bio paper and answering the chem questions you guys put up
more pls
nao keep this chemistry, no bio in hereexplain protein synthesis from chemical viewpoint
gg no re
What is heat of combustionnao keep this chemistry, no bio in here
Energy released when a compound undergoes combustion (burns)What is heat of combustion
What is your option topic?Energy released when a compound undergoes combustion (burns)
Properrrrr pls
1,3-dimethyl-2-ethyl-1,4-pentadieneWhat is your option topic?
In the meantime:
Name this
It has 6 carbons, not 51,3-dimethyl-2-ethyl-1,4-pentadiene
1,3-dimethyl-2-ethyl-1,4-pentadiene
.It has 6 carbons, not 5
Yay!lel dun goofed.
2,4-dimethyl-1,3-hexadiene
IndustrialYay!
That was quite a tricky one. Always remember to look for the longest chain.
What is your option topic?
Perf answer. Band 6lel dun goofed.
2,4-dimethyl-1,3-hexadiene
Do this pedigree question and tell me what you get!Evaluate how environmental issues are addressed in the Solvay process.
- Bold 1: Poor leading sentence. Ozone depletion is caused by various substances not only CFC's which is what you impliedOzone depletion occurs because of chlorofluorocarbons. Chlorofluorocarbons are alkane molecules with the hydrogens replaced with chlorine or fluorine molecules. In the troposphere these chemicals are extremely stable, chemically inert and unreactive. They are non-corrosive chemicals which were originally used to replace ammonia as refrigerants and in air conditioners. When chlorofluorocarbons leak into the atmosphere they travel up to the stratosphere and cause ozone depletion as strong uv Rays split the molecule forming free radicals.
CClF2 + UV ----> Cl(radical) + CF2 (radical)
Cl + O3 ---> ClO (radical) + O2
ClO radical + oxygen radical ---> Cl radical plus oxygen
As apparent, chlorofluorocarbons cause ozone depletion and during the process the chlorine radical is regenerated and known as a catalyst. One chlorine radical can destroy thousands of ozone molecules before being removed by methane
+1 (not on mark though)Cut down on why CFC's are used, unnecessary. You didn't define what Ozone depletion is. I would give it 4/6.
Oo I'm a little rusty with Solvay but i'll bite (without looking through my notes!)Evaluate how environmental issues are addressed in the Solvay process.
Why does TDS effect marine life/water quality? Elaborate.Oo I'm a little rusty with Solvay but i'll bite (without looking through my notes!)
The Solvay Process describes the industrial conversion of the raw materials ammonia, limestone and brine into sodium carbonate over a series of steps. The net chemical reaction that occurs is;
NaCl + CaCO3 --> Na2CO3 + CaCl2
While there is some market for the calcium chloride byproduct, the supply exceeds the demand. This is an issue as if it is dumped into rivers and waterways it can significantly increase the level of TDS, hence reducing water quality and negatively affecting the natural ecosystem. This issue is addressed through delivering the calcium chloride waste into a 'settling pond' where it does not affect local water systems. The water used during the formation of NaHCO3 in the Solvay process is heated to high temperatures, and can cause thermal pollution if dumped in rivers and waterways, resulting in decreased oxygen solubility and threatening aquatic life. Hence, the water used in the process must be sufficiently cooled before being discharged into the environment. The Solvay process is efficient in the sense that the majority of the raw materials (such as ammonia) are recycled and thus resource depletion is kept to a minimum (?)
Guys I feel like I know most of the Chem concepts but my articulation is terrible. I really don't want to lose marks cos of how I phrase things I need your help, plz gib more practice questions