popcorn

Would someone help in the following:- 1) draw lewis structure of odd electron molecules or atoms. 2) how to decide when there is going to be double or a co_ordinate bond? (had this doubt while trying to draw the structure of S2O3(2-)) 3) how to claculate formal charge and oxidation number in general and a co_ordinate bond is involved in particular? THANK YOU IN ADVANCE.....

On dilution of different amts. of H2SO4 in given volume of water, why doesn't the temp. of the resulting solution not vary linearly. Thankyou .

On dilution of different amts. of H2SO4 in given volume of water, why doesn't the temp. of the resulting solution not vary linearly. :

NOTE:- i have taken arbitrary atomic mass to make it easier to explain.learn about limiting reagent and excess reagent once you finish reading this. hope this helps you. let atomic mass of boron be = 2g/mol hydrogen = 1g/mol oxygen = 3g/mol therefore, molecular mass of B5H9= 19g // i will takr it to be 20, for easy explanation O2 = 6g H2O = 5g now, no. of moles of B5H9 taken = 126/20=6.3 no. of moles of O2 taken = 192/6= 32 according to he rxn. 2 moles of B5H9 will require 12 moles of O2 so 6.3 " " " " " (6*6.3)" " " =37.8 =38(approx) but we have only 32 moles of O2. hence O2 is the limiting reagent.32 moles of O2 will completly react. gong back to the rxn. 12 moles of O2 will give 9 moles of water 32 " " " " " 24 " " " therefore amuont of water produced= 24*5=120 g.

hi! i am shriram, doing my Integrated Msc. course in India. i love chemistry and would like to to pursue nanochemistry(though i know nothing about it as of now...) as my field of study.