Recent content by k3l

Basic motion stuffs, time and velociton :( hi oh my gosh... i can't believe i forgotten how to do this... i have to work out the time when will the two particles meet... where one particle (A) is traveling at a velocity of 80km/h, and (B) is traveling with a velocity of 100km/h while (B) is...

from a series of reactions i got the formula which produces HNO_3... the "result" formula is: 4N_2_(_g_) + 6H_2_(_g_) + 8O_2_(_g_) -> 4HNO_3_(_a_q_) + 4H_2O_(_l_) The question asks to find the weight of nitrogen, and the Volume of nitrogen (at STP) required to produce 5.00 kg pure nitric...

hi, i need help on a question its like... there is a operator supported a plank horizontally by its two ends, but when loaded bricks on its centre and found that the weight of 166kg of bricks was just enough to break the plank. But an identical plank is now being used as a ramp to load a full...

ok, actually its a simple question (i think lol) the whole question is like this: Concentrated Sulfuric acid contains 98% by weight of pure acid and has a specific gravity of 1.80. a certain volume of this is added to water and the volume made up to 500.0mL. a mean titre of 19.60mL of this...

well, its only part of the question

ok, don't worry about the first question... solved but here is another question... what is a specific gravity? its like this... Concentrated Sulfuric acid contains 98% by weight of pure acid and has a specific gravity of 1.80... what does this mean?

volumetric analysis question. Help please hi ppl. i need help on a chem question: 5.00mL of conc. H2SO4 was pipetted into a volumetric flask containing water and the volume made up to exactly 1.00L. Three 20.00mL samples of 0.200molL^-1 NaOH required 22.30, 22.16, 22.17 and 22.18 mL of the...

1.324g of compound C(x)H(y)Cl(z) was split into two samples of equal mass. Burning the first gave 1.189g of CO(2). Treating the second gave 1.292g of silver chloride. if the relative molecular mass is 147 determine; the Empirical Formula? (ie. find x, y and z) thx

why is the minus sign there? instead of plus? thx

ahaha, yeh thank you very much for the answer :D

hi all, i am just wondering... if there is a guy has to jump off a small boat (u know... those have no engine, and etc... just a small wooden boat) which is stay stationary in calm water and is about to explode (for some reason... ). so yeh, that guy has to jump off the boat from one of the...

soloved :P problem soloved, thanks anyway