Wednesday
December 4, 2013

# Posts by shaun

Total # Posts: 101

Chemistry
If a liter of a buffer is prepared with a final concentration of .3M monosodium phosphate and .5M disodium phosphate, what is the pH of this buffer? (Hint: Which is conjugate acid (HA) and conjugate base (A-)? What's the pKa for this particular pair of HA and A-?) So I thi...

Chemistry
M = # moles KOH / # kg solvent M = 50.0 moles KOH / 3.4 kg

Math
128km

math
I believe this is the form I need to use.. sin^2(x)=(1-cos 2x)/(2) I think I need to expand the problem with that, but I'm bit confused how..

math
Use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine. sin^6(x) Answer=__________ ~Thank you.

Math
Ahh Surprised I didn't see that.. Thank you.. The exact value would be .5773 right?

Math
Use an addition or subtraction formula to write the expression as a trigonometric function of one number, and then find its exact value. (tan(π/2)+tan((2π)/3)) / (1-tan(π/2)tan((2π)/3)) Answer=__________ Exact value answer=_________ ~Thank you.. I thought i...

physics
An object is dropped onto the moon (gm = 5 ft/sec2). How long does it take to fall from an elevation of 250 ft.?

math
LCM of 2t, (t-2) and t(t-2)

math
never mind same person

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