Thursday
December 12, 2013

# Posts by carl

Total # Posts: 214

Math
Make a tree diagram of all the possible arrangements of the word veer

njit
i did it but i can't find the right answer i tried several times but i cant get the result please help me out

njit
please life saver i am taking a quiz now can some one help me with this pleeeeeeeaaaaaaaaassssssseeee Calculate the pH of 0.175 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13.

chem 126
i did it i found 0.4 but wrong

chem 126
Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH < 8.3) and pink in the basic form (pH > 10.0). It is a weak acid with a pKa of 8.7. What is the ratio of the conjugate base concentration to the acid concentration, that is, [B-]/[HB] w...

TRIGONOMETRY HELP
Thank You!!!

TRIGONOMETRY HELP
Prove that: cos²Θ - sin²Θ = 2cos²Θ - 1

scienses
A solution contains 0.0180 M HNO3, 0.0268 M HI, and 0.250 M formic acid, HCOOH. What is the pH?

TRIGONOMETRY HELP
Thank You!!!

TRIGONOMETRY HELP
Prove that: (tan²Θ)x(sin²Θ) = (tan²Θ)-(sin²Θ) show work

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