:) I was wondering in the equation z^4 = m/(square root of 2) + (m/(square root of 2)) i
with the answer saying the second line is z = m cis (pi/4)
where they got the 4 from. did they get it from z^4 or something? thanks!
ow. I'm not sure how to calculate this.
Prepare five 25mL solutions of acidified potassium dichromate from a stock solution of 0.010M K2Cr2O7in 2.0 M H2SO4 with the concentrations
and 0.0040 M.
estion 1: Draven collected a 1ml sample from a local river. Draven added 99 ml of water to the sample. Draven then took 5 ml of the diluted sample, and determined the 5 ml sample to contained 10 mg of sodium chloride. what is the concentration of sodium chloride in the river?
question 2: how many grams of H2 could be produced when 13 g of H202 decompose?
question 3: how many molecules of carbon dioxide could be produced when 25 ml of a 0.8 M ethanol, c2h60, combusts with 5.18X10^23 molecules of oxygen? the unbalanced equation for the combustion of ethanol is given below: