Thursday
May 23, 2013

Posts by Lindsey

Total # Posts: 301

Biostatistics
Why are the results of an independent samples test different from the results of a Tukey HSD test on the same data?

Chemistry
What is the Henderson-Hasselbach equation? Use the equation to determine the ratio of [A-] to [HA] necessary to create an ammonium chloride/ammonia buffer with a pH of 8.50. Describe how to make this buffer given a solution of 0.1 M NH3 (aq) and a bottle of NH4Cl(s).

Chemistry
Why can a buffer be created by the addition of sodium hydroxide to acetic acid, but not from the addition of sodium hydroxide to hydrochloric acid?

math
If you need 240 oz of paint to cover 1200 in. How much paint do you need to cover 2000 in.?

Chemistry
Suppose you have a supply of the following metals: Fe, Ni,Sc, Cr, Au, K. Which of there could be mixed to make substitutional alloys? Which metals are incompatible for this purpose. Clearly explain why there metals would be incompatible. I am unsure about the metals that are i...

Chemistry
Suppose MgSe(a=545 pm) and SrSe (a=623 pm) both crystallize with a NaCl (rock salt) structure. Calculate the ionic radius of Sr2+ (Hint:Assume that the Se2- ions actually touch in MgSe.)

chemistry
if an organic liquid has a density of 1.11 g/mL and has a measured volume of 500. mL, what mass of liquid is present?

physics
A 0.36 kg soccer ball approaches a player horizontally with a velocity of 18 m/s to the north. The player strikes the ball and causes it to move in the opposite direction with a velocity of 21 m/s. What impulse was delivered to the ball by the player? Answer in units of kg &mi...

math
If I am converting 0.00603 into scientific notation, which would be correct? 6.03 x 10^-3 OR 60.3 x 10^-4 I am a little confused about what to do when there is a zero between two numbers.

Chemistry
That makes sense. I wasn't thinking about the fact that the number in front of d is one less than n. Thank you.

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>