Most popular questions and responses by Quentin
  1. Biology

    In what situations would sampling work best for estimating population size, in what situations would mark and recapture work best and why?

    asked on October 3, 2010
  2. chem AP

    does CrCl3 form an acidic solution in water?

    asked on April 15, 2008
  3. chemistry

    if 429 grams of gas occupies 25.6L at 49 degrees C at a pressure of 759 mmHg what volume will 4.29g of gas will occupy at 53 degrees C (assume pressure is unchanged)

    asked on May 4, 2010
  4. chemistry

    calculate the pressure in atm of a balloon filled with 7.5g of helium gas if the baloons volume decreases to 7.5L suppose the balloons pressure and volume are originally 799 mmHg and 15L

    asked on May 4, 2010
  5. chemistry

    the specific heat of aluminum is 0.214 cal/g degrees C. calculate the heat necessary to raise the temperature of 55.5g of aluminum from 23 to 48.6 degrees C

    asked on May 4, 2010
  6. chemistry

    calculate the number of moles there are when a gas occupies a volume of 3.95L at 37 degrees C and .985 atm

    asked on May 4, 2010
  7. chem ap

    please tell me if i am correct a buffer is made using HF and NaF-with a pH of 3.00. compute the ratio of the conjugate base F- to weak acid HF. I previously found Ka of HF which is 7.2x10^-4 and the ph of HF is 3.15. the concentration of NaF would be

    asked on April 17, 2008
  8. Calculus

    A cylindrical water tank has radius r=1 meter and height 10 meters. Suppose the tank is lying on its side and is filled halfway with water. How much work does it take to pump all the water out the top of the tank? The height is now 2 meters. Thanks, I'm

    asked on December 31, 2015
  9. Chemistry

    What mass of KOH is required to neutralize 200mL of 3.16 M HNO3?

    asked on June 10, 2013
  10. chemistry

    calculate the amount of heat necessary ti raise the temperature of 8.5kg of water from 12.5 to 84 degrees C

    asked on May 4, 2010
  11. Finance

    Year Cash Flow 1 $695,000 2 876,250 3 1,057,500 4 1,238,750 5 1,420,000 1. Calculate the IRR and NPV of this project utilizing a 12% discount rate and a 15% cap rate. Ms. Brown was able to secure a loan for $1,540,000, and an equity investor agreed to

    asked on July 19, 2010
  12. english

    what is the complete and simple subject for "Valentine's day has a very interesting History."

    asked on September 25, 2012
  13. math

    The length of a train 15 cars long if 1 car is 18 m long

    asked on January 20, 2011
  14. chemistry

    calculate the percent composition or w/v% of 3x10 to the 2nd power mL solution containing 15g of glucose

    asked on May 4, 2010
  15. Math

    4 3/4 + v = 17 1/8 What is v

    asked on October 16, 2012
  16. math pre-algebra

    N to the power of negative 5 N to the power of negative 5 is aready in its simplest form. Unless you know the value of N, this problem can't be solved any further.

    asked on January 22, 2007
  17. math

    was is 13*13

    asked on February 26, 2018
  18. Math

    What is the value of y. Y-4/5=11/20

    asked on October 16, 2012
  19. Probability

    I need help calculating a c value such that f(x,y) is a probability density function. What makes a function a probability density function?

    asked on November 8, 2010


    asked on June 4, 2010
  21. chemistry

    what is the density of O2 gas at STP

    asked on May 4, 2010
  22. chemistry

    convert 353 torr to atm

    asked on May 4, 2010
  1. Math

    Excellent, what a website it is! This blog presents valuable data to us, keep it up. kjøpe Chelsea Kenedy drakt på net

    posted on April 28, 2019
  2. Math check, please

    Bianca must have another test because fluffy unicorn is correct. Unit 2 Lesson 13 Surface Area of Prisms and Cylinders Quick Check D D A C 100%

    posted on February 7, 2019
  3. Texas History

    TYSM Anon! You Rock!!

    posted on February 7, 2019
  4. Language Arts - Please Check My Answer For This

    I think the answer is D

    posted on February 3, 2016
  5. Calculus

    Whoops, Assume gravity is 9.8, wrong name

    posted on December 31, 2015
  6. Language Arts

    didnt think so.. so you thought IF YA WANNA PASS LISTEN 2 MEH .C .D .A .A .B YA WELCOME

    posted on October 30, 2015
  7. L.A

    didnt think so so you thought THE REAL ANSWER TO THE QUESTION IS .C YA DUMMIES

    posted on October 30, 2015
  8. Math

    4 3/4+v=17 1/8 What is v

    posted on October 16, 2012
  9. chemistry

    Calculate the pressure in atm of a balloon filled with 7.50g of helium gas if the balloon's volume decreases to 7.50L. Suppose the balloon's pressure and volume are originally 799 mmHg and 15.0L.

    posted on May 4, 2010