Wednesday
May 22, 2013

# Posts by Confused

Total # Posts: 283

Chemistry
A 0.5224g sample of an unknown monoprotic acid was titrated with 0.0998M of NaOH. The equivalence point of the titration occurs at 23.82 mL. Determine the molar mass of the unknown acid.

chemistry
Hi Dr. Bob! I actually cleared it all up, but thank you!

chemistry
Hello, I have data here: tube # Contents Initial color (after 2 drops of universal indicator) Color after adding HCl Color after adding NaOH (after the HCl had been poured) 1 CO32-/HCO3- Dark purple Purple Purple 2 CO32-/HCO3- Dark purple -- -- 3 HCH3CO2/C H3CO2- red Light red...

Chemistry
Thanks so much! I get it now!

Chemistry
Hi Dr. Bob, When I do that, I get 11.30 as the pH, although I don't think that's it. Did I miss something?

Chemistry
HOBr (aq) <----> H+ (aq) + OBr- (aq), Ka = 2.3 x 10^-9 Hypobromous acid, HOBr, is a weak acid that dissociates in water, as represented by the equation. (a) Calculate the value of [H+] in a solution of HOBr that has a pH of 4.95. Ans: 1.1 * 10^-5 M (b) Write the equilibr...

Math
Help with identify the property 45x6=(40+5)x(5+6)= I think Assoiative prop. ( is this correct?) 6x1=6 I put identity prop. of 1 4+(6+5)=(4+6)+5= distributive prop. 8+(-8)=0 I put identity prop. of 0 5x4=4x5 I put communtive property Can you tell me if I have them correct? Thanks

math
A sample survey of 50 people in Harrisburg, PA indicates that 10 of them know the mayors name in the neighboring city. Out of 5,500 Harrisburg residents, how many would you predict know the name of the mayor of the neighboring city? I thought 1100. I did 10/50=x/5500, is this ...

physics
A spherical conductor has a radius of 14.0 cm and charge of 26.0 µC. Calculate the electric field and the electric potential (a) r = 10.0 cm, (b) r = 20.0 cm, and (c) r = 14.0 cm from the center. how do i calculate k?

physics HELP MEEE SO CONFUSED
A spherical conductor has a radius of 14.0 cm and charge of 26.0 µC. Calculate the electric field and the electric potential (a) r = 10.0 cm, (b) r = 20.0 cm, and (c) r = 14.0 cm from the center.

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