Bret
Newest questions and responses by Bret
advanced algebra 2
(5y^423y^3+24y^27)/(y3)
asked on January 21, 2018 
Enthalpy (chemistry 105)
23.0mL of water density of water is 1.00 g/mL 1g = 1ml 23g of water Cs of water 4.18 J/(gC) moles= 2.40g/72.0(g/mol)= .033 mass = 23g+2.4g = 25.4g Ti= 14.5 C Tf= 25.0 C Calculate the enthalpy change, ΔH, for this reaction per mole of X. I'm getting 33.4
asked on October 29, 2017 
geometry
given: segment HI congruent to segment GJ, segment HI parallel to segment GJ prove: triangle GJH congruent to triangle IHJ
asked on November 17, 2016 
geometry
if m
asked on August 31, 2016 
algebra
what two numbers add up to 4 and multiply to 6?
asked on May 5, 2016 
math
what is another way to equal 40 and i already have 10•4•1, 20•2•1,5•4•3,40•1•1,10•2•2?
asked on April 2, 2015 
math
find the unit rate and use it to write an equation relating the two quantities? 62 dollars to rent 14 video games 62/14?
asked on February 19, 2015 
Physics
An athlete whirls a 7.36 kg hammer tied to the end of a 1.5 m chain in a horizontal circle. The hammer moves at the rate of 1.07 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain.
asked on January 28, 2013 
Physics
How much power does a water pump exert lifting 30 kg of water at a constant velocity 20 m each second
asked on February 19, 2012 
Physic
A 89.0 kg person stands on one leg and 90% of the weight is supported by the upper leg connecting the knee and hip jointthe femur. Assuming the femur is 0.640 m long and has a radius of 1.90 cm, by how much is the bone compressed?
asked on May 8, 2011 
Physic
The spout heights in the container in the figure are 15 cm, 30 cm, 45 cm, and 60 cm. The water level is maintained at a 68 cm height by an outside supply. What is the speed of the water out of the 15 cm high hole? What is the speed of the water out of the
asked on May 8, 2011 
math
consider a state lottery that has a weekly television show. on this show, a contestant receives the opportunity to win $1 million dollars. the contestant picks from 4 hidden windows. behind each window is one of the following: $150,000, $200,000, $1
asked on October 23, 2008 
chemistry
Posted by Bret on Friday, March 16, 2007 at 10:44am. what is the oxidation number for nitrogen in the following? NH3 NO2 1 N2 NO2Cl N2H4 For Further Reading chemistry  bobpursley, Friday, March 16, 2007 at 11:26am We will be happy to critique your
asked on March 16, 2007 
chemistry
what is the oxidation number for nitrogen in the following? NH3 NO2 1 N2 NO2Cl N2H4 We will be happy to critique your thinking or work. I don't even have a clue as to how to work it out.
asked on March 16, 2007 
math
what is
asked on December 1, 2006

advanced algebra 2
thanks
posted on January 21, 2018 
Enthalpy (chemistry 105)
Wow Pearson was messed up I was right the whole time. Thank you for replying, but your advice was missing some details. The mass of the unknown (like in my mole calculation) has to be included in the mass with the water to get the right amount of joules.
posted on October 30, 2017 
math
10%?
posted on August 31, 2016 
algebra
alright, thank you!!
posted on May 5, 2016 
Science 10
mgh=1/2mv^2 gh = 1/2v^2 9.81 x h = (0.5)(15.0 m/s)^2 9.81/9.81 x h = 56.25/9.81 h = 5.7
posted on November 26, 2015 
Math
30%, .4, 1/2
posted on February 19, 2015