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Lets Solve A's chem MCQ paper together.
yup you are right .... so lets just prepare ourselves as much as we can..... -
Chemistry: Post your doubts here!
Use of the Data Booklet is relevant to this question. Most modern cars are fitted with airbags. These work by decomposing sodium azide to liberate nitrogen gas, which inflates the bag. 2NaN3 3N2 + 2Na A typical driver’s airbag contains 50g of sodium azide. Calculate the volume of nitrogen this... -
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hmmmm....ok then good night have classes tomm :) (*yawn*)
hmmmm....ok then good night have classes tomm :) (*yawn*)- saudha
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yup we do... i live in dubai... i have visited saudi abt 3 times and have been to riyadh once...
yup we do... i live in dubai... i have visited saudi abt 3 times and have been to riyadh once... i like the city..- saudha
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yup.. i noticed......so u live in riyadh huh?
yup.. i noticed......so u live in riyadh huh?- saudha
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Chemistry: Post your doubts here!
let me see if i find one ill post it....... -
Chemistry: Post your doubts here!
how about this? http://alevelchem.com/aqa_a_level_chemistry/unit3.4/s3411/04.htm -
Chemistry: Post your doubts here!
did u try the revision page in this site ? -
Chemistry: Post your doubts here!
hope this helps http://www.chemguide.co.uk/analysis/nmrmenu.html#top -
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Chemistry: Post your doubts here!
Given the equation for the complete combustion of ethylbenzene ... 2C8H10(g)+ 21O2(g)==> 16CO2(g)+ 10H2O(l) what volume, in cm3, of ethylbenzene, is burned completely by 225cm of air? (3 sig fig answer, all gas volumes are measured at the same temperature and pressure, assume air is 21% oxygen)... -
Chemistry: Post your doubts here!
i think thts right ...............thxxx -
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A level Biology: Post your doubts here!
as far as i know ... it is mainly known for starch content but also can contain oils and proteins .... used to synthesize cell wall and proteins 4 growth...... -
Chemistry: Post your doubts here!
well... i would do it like this: plot a graph for conc of ethyl ethanoate against time..... and compare your graph with the image below....and explain y do u thnk this is so?