CHEM AND BIO HELP AND TIPS HERE

[WARRIOR]

ok ill do the question now

[6394]

o ..easy..

Look the product of Molten led iodide is
MOLTEN LEAD AND IODINE GAS RGHT..THE GAS EVAPORATES! but as you see ffrom the diagram teh MOLTEN LEAD is left in the tube..and is in contact with both electrodes..adn hey??? lead is a metal! conducts electricity !!! so it completes the ciricuit !!

and d )  since  lead iodide is toxic..and a gas is produced..always do that in a fume cupbborad ..and wear safety goggles cz gas produced

By the way im doing the exam with you on the 18th goodluck and heere are some notes i wrote ..hope its useful

https://studentforums.biz/index.php/topic,7663.0.html

lol <3ed de way u xplained this part 

[Vin]

ok ill do the question now

thanks .. jus wanna make sure im right ..

[WARRIOR]

graph is perfectly fine but hmmm.. im not sure if the bars should be stuck together?
you should leave space between each 1 right?? or wrong ?  nto sure but the graph is perfecty fine

and i kno it was hard to draw it on computer but u knew each line as .5? so urs was a bit inaccurate on computer but just making sure

[Vin]

ur right ..   when i asked my dad he told me its more lik a histogram than a bar graph .. nyway thanks ..

[Shazizzzle]

ur right ..   when i asked my dad he told me its more lik a histogram than a bar graph .. nyway thanks ..

In Chem and Bio, You HAVE to have space in between the bars, says the mark scheme.
So, that makes it DIFFERENT from a histogram where they're joined, and MORE LIKE a bar chart, where they're separate.

[Vin]

ya thts wat i meant .. prolly u didnt hav a look at my previous post were i'd posted the doubt .. it looks lik a histogram .. it should hav been spaced .. thts wat i meant .. nvm

[CatAly$t]

can somebody tell me why is a food chain usually have fewer than five trophic levels?

it's in the syllabus...section IV

[CatAly$t]

and can somebody tell me why there is an increases efficiency in supplying green plants as human food and that there is a relative inefficiency , in terms of energy loss,in feeding crop plants to animals....

it's also in the sylllabus...section IV

[princess12]

interpert simple chromatograms including the use R values
 
urgently please fast

[Mathewness]

can somebody tell me why is a food chain usually have fewer than five trophic levels?

it's in the syllabus...section IV

As you higher through trophic levels energy is lost. Eventually there wouldnt be sufficient energy for more trophic levels

[princess12]

answer me fast please

[Mathewness]

and can somebody tell me why there is an increases efficiency in supplying green plants as human food and that there is a relative inefficiency , in terms of energy loss,in feeding crop plants to animals....

it's also in the sylllabus...section IV

Have you got the question right...?
I think you mean why is it more efficient to eat the green plant than the animal, in which case answer would be that less energy is wasted by eating the plant than eating the animal..

[princess12]

interpert simple chromatograms including the use R values
   
urgently please fast

[Vin]

and can somebody tell me why there is an increases efficiency in supplying green plants as human food and that there is a relative inefficiency , in terms of energy loss,in feeding crop plants to animals....

it's also in the sylllabus...section IV

it means that why there is an advantage in feeding on green plants directly rather than having animals fed (e.g. feeding maize to a cow)  and consuming them

ans. less energy lost when plants directly consumed .. =)