Quentin
Most popular questions and responses by Quentin
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 
chem AP
does CrCl3 form an acidic solution in water?
asked on April 15, 2008 
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 
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 
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 
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 
chem ap
please tell me if i am correct a buffer is made using HF and NaFwith 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 
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 
Chemistry
What mass of KOH is required to neutralize 200mL of 3.16 M HNO3?
asked on June 10, 2013 
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 
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 
english
what is the complete and simple subject for "Valentine's day has a very interesting History."
asked on September 25, 2012 
math
The length of a train 15 cars long if 1 car is 18 m long
asked on January 20, 2011 
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 
Math
4 3/4 + v = 17 1/8 What is v
asked on October 16, 2012 
math prealgebra
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 
math
was is 13*13
asked on February 26, 2018 
Math
What is the value of y. Y4/5=11/20
asked on October 16, 2012 
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 
REDWOOD ELEM
1 OVER T MINUS 2 EQUALS T OVER 8 PLEASE HELP ME SOLVE
asked on June 4, 2010 
chemistry
what is the density of O2 gas at STP
asked on May 4, 2010 
chemistry
convert 353 torr to atm
asked on May 4, 2010

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 
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 
Texas History
TYSM Anon! You Rock!!
posted on February 7, 2019 
Language Arts  Please Check My Answer For This
I think the answer is D
posted on February 3, 2016 
Calculus
Whoops, Assume gravity is 9.8, wrong name
posted on December 31, 2015 
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 
L.A
didnt think so so you thought THE REAL ANSWER TO THE QUESTION IS .C YA DUMMIES
posted on October 30, 2015 
Math
4 3/4+v=17 1/8 What is v
posted on October 16, 2012 
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