Search results

help!! i am preparing for my chem exam next week and found a question which i can't make head nor tail of..... a 0.100mol/L NaOH solution is used to titrate 50mL of 0.100mol/L CH3COOH. Calculate the pH of the solution after 40mL of NaOH is added [Ka = 1.8 x 10^(-5)] please, if anyone...

How do i ESTIMATE the combustion energy value for the alcohol substituent (OH) in ? given that methane is 726, ethane is 1367, 1-propanol is 2021 and 1-butanol is 2676.. and also that the combustion energy involved in each -CH2- is 650kJ/mol. huhhhh??

i seeeee. thank you for your help.. i guess now i have to rack my brain trying to think up a way i could do this in a laboratory!...

ahh.. i thought it might have to involve concave lens and what not.. but how exactly am i meant to produce an experiment to show this - shining a red light through a bubble is not easy. .. and why is it red light? why can't it be blue??

Underwater is a bubble of air 10cm in diameter. you shine a torch beam of red light(650nm) at the bubble. What happens to the beam in the bubble and after the bubble? Design an experiment you could do in the school laboratory that could lead to an answer. help me please.. is it possible to...

hmm.. yes that does help :).. what a stupid question it is, though... i have to 'think up' an experiment... like with the whole hypothesis and what not. pretend of course, as i cannot go to planet x..

greetings to all my superiors. I have called upon you to assist me in this one question: On planet X, the atmosphere is made up of gases that scatter low frequencies. How would you describe the sunsets on Planet X? Think of an experiment you could design to find the answer. yes.... hmmm...