Recent content by htk

Homework Statement Consider the reaction 2Bi2S3 +9O2 ---------> 2Bi2O3 +6O2 The reaction is carried out and kept at 1.00 atm pressure and 174 C throughout. How many liters of O2 are needed to produce 3.87 L of SO2? How many grams of Bi2S3 are needed? The Attempt at a Solution my...

KI + KClO3 + H2SO4=> I2 + KCl + K2SO4 + H2O KMnO4+NaNO2+KOH=>K2MnO4+NaNO3+H2O These two equations make me crazy. :rolleyes: I try to balance it, but it won't work for me. Please help. Thank you! :biggrin:

find u X v and show that it is orthogonal to both u and v. u= 6k v=-i + 3j + k http://s763.photobucket.com/albums/xx275/trinhkieu888/?action=view&current=666.jpg This is what I got from the picture, but my teacher said that I have one more step to do to show that they are orthogonal, I...

Given: at 70 pounds <60.02, -35> at 40 pounds <28.28, 28.28> at 60 pounds <-42.43, 42,43> now add the components to find the resultant of the system and use it to find the magnitude and direction angle. ----------------------> can anyone please explain it to me how to add the...

1) use the Law of Cosines to find the angle theta between the given vectors. (Assume 0 degree <=theta<=180degrees)v= i+ j, w=2(i - j) My teacher told me that me that I have to find a. length(v) = a b. length(w) = b c. length of vector between (1,1), (2,-2) = c. (use the distance...

can anyone please help me how to find the direction angle of a vector? Thank you!