# Posts by roshan

Total # Posts: 23

Surfaces of cones
Steve's answer is incorrect. In the final stage, he said (24*3)^2. However, 24 is not the RADIUS of the cone's base. It is the DIAMETER. Therefore, you must halve 24. The final calculation should hence be: V = (?/3) (12*3)^2 (16*3) = 20736

CHEMISTRY
HOW TO PREPARE 1 M GUAICOL FROM LIQUID GUAICOL SOLUTION MOLECULAR WEIGHT 124.14 DENSITY 1.11

Physics
The ratio of velocities of sound in hydrogen and oxygen at stp is???

science
2R

calculus
1/12-0 integral from 0 to 12 for 50+14 sin(pit/12) 1/12 [50 t-14.12/pi cos pit/12] from 0 to 12 50 t28/pi =58.9

chemistry
g)How many grams of agarose are needed to make 100 ml of 2.5% agarose solution?. h) Calculate the volume of buffer to which 500mL of 40 mM potassium chloride solution must be diluted to make a new concentration of 0.001M.

chemistry
How would you dilute a 2 mg/mL NaCl stock standard to make 100 ml of a 50 mg/dl standard?

chemistry
In performing an immunological procedure, you add 2 mL of serum to 8 mL of saline. Two 1:2 serial dilutions are then made. What is the dilution of serum contained in the final tube?

chemistry
require 400 mL of a 0.4 M NaOH solution and you have a 1.2 M stock solution. How would you make up the solution?

calculus
Lim Tan^2(3x)/2x^2 X-0 Find the Limit?

chemistry
Balance the following equation: K2CrO4+Na2SO3+HCl>>>>>>Na2SO4+CrCl3+H2O Enter the coefficients for eachcompound, separated by commas, in the order in which they appear inthe equation (e.g., 1,2,3,4,5,6,7

chemistry
would you expect lead chloride to dissolve in dilute HNO3? Explain

chemistry
100ml of 0.05M of NaOH is added to 0.5g of Ca(OH)2. find the [OH] (from Ca(OH)2)

chemistry
25ml of 0.05M of NaOH and the average volume of HCl is 17.7ml after titration and the concentration of HCl is 0.1028M. Find the [OH] eq (from titration). How do u solve this...

chemistry
the solubility of BaF2 is 6.29x10^-3M and the solubility of barium fluoride in 0.15M NaF is 4.4x10^-5M. Compare the solubility and explain?

chemistry
what is the molar solubility of barium fluoride in 0.15M NaF at 25 degrees C?

chemistry
calculate the molar solubility of barium fluoride in water at 25 degrees C. The solubility product constant for BaF2 at this temperature is 1.0x10^-6

chemistry
What concentration of the barium ion,Ba^2+ ,must be exceeded to precipitate BaF2 from a solution that is 1.00*10^-2M in the fluoride ion,F-? Ksp for barium fluoride is 2.45*10^-5.

chemistry
Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 ....For the following salts AlCl3, Na2CO3...

chemistry
Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 ....For the following salts AlCl3, Na2CO3...

chemistry
Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 For the following salts give an ...

chemistry
) Aluminum Chloride has a universal indicator color of red and the Ph of 4.0 b) Sodium Carbonate has a universal indicator color of violet and the Ph of 9.5. c) Ammonium Acetate has a universal indicator color of green and the Ph of 7.5 For the following salts give an ...