Saturday

February 28, 2015

February 28, 2015

Total # Posts: 29

**Chemistry**

original question on 11/19 @ 2:26 am current question page 4, close to the bottom.
*November 20, 2014*

**Chemistry**

Can you check my answer for the PH question @12:04 11/20?
*November 20, 2014*

**Chemistry**

can you look at the additional attached questions from me this morning at 2:29am? not fully understanding them. thanks for your help
*November 19, 2014*

**Chemistry**

Calculate the molar H3O and ClO3 concentrations of a .28 M solution of perchloric acid (HClO3)?
*November 19, 2014*

**Chemistry**

The ion-product of pure water, Kw, is 2.51 * 10(-14) at the body temp of 37 degrees Celcius. What are the molar H2O and OH concentrations in the pure water temperature?
*November 19, 2014*

**Chemistry**

pKa = 7.6 for HCOOH so pH= 7.6 + log [.07]/[.07} pH = 7.6 is this correct or at least moving in the right direction?
*November 19, 2014*

**Chemistry**

I am not understand how to use log on my calculate, so no answer is calculating. can you explain how to use log?
*November 19, 2014*

**Chemistry**

I am not really sure how the find the pKa. Do I need to find the conjugate acid -base pair first?
*November 19, 2014*

**Chemistry**

What is the PH of an aqueous solution consisting of 0.070 M formic acid (HCOOH) and 0.070 M sodium formate (HCOONa)?
*November 19, 2014*

**Chem**

In the reaction NH4Cl = NH3 + HCl, the equilibrium concentrations were found to be [NH3] = [HCl]=3.71 * 10-3M Calculate the value of the equilibrium constant?
*November 7, 2014*

**Math**

f(x) = x^3 y1 = -x^3 + 4 b) Graph the function obtained from f by first translating up 4 units, then reflecting about the x-axis. Write a formula for the resulting function, y2. y2 = ? i tried x^3-4. my value wasn't correct
*October 10, 2014*

**exercise physiology**

calculate the total amount of work performed in 5 minutes of exercise on the cycle ergometer given the following flywheel 25n cranking speed 60rpm distance travel 6meters
*June 30, 2014*

**Physics**

Two identical teflon rods are 10 centimeters long and rubbed with fur so that they each have a total negative charge of 20 microCoulombs that is uniformly distributed along their length. They are arranged along the same axis, with their ends 5 centimeters apart. What is the ...
*January 23, 2014*

**geometry**

Ryan’s teacher asked him to graph circle E with equation (x – 5)2 + y2 = 25. Below is the graph he submitted. Circle E that contains points 30, 0; 5, negative 25; negative 20, 0; 5, 25. What, if anything, did Ryan do wrong when graphing this equation?
*July 20, 2013*

**physics**

A planet orbits a star, in a year of length 4.46 x 107 s, in a nearly circular orbit of radius 3.17 x 1011 m. With respect to the star, determine (a) the angular speed of the planet, (b) the tangential speed of the planet, and (c) the magnitude and direction of the planet'...
*July 16, 2013*

**Physics**

A player kicks the football from the ground with a velocity of of 30m/s at 45 degree angle. Find the initial vertical velocity?
*March 13, 2012*

**math**

(p¡æq)¡ê~r
*June 14, 2011*

**math**

thank you, i think i got it now.
*May 21, 2011*

**math**

The area of some shape varies directly with the square of its side. If a shape with 2cm sides has an area 10cm^2,what would be the area of a shape ofthe same type with side of 3cm.
*May 21, 2011*

**science**

compare the elements in an early protostar and those in a young star formed from star dust of older stars?
*August 13, 2010*

**Math**

Can you tell me how you got that
*April 16, 2009*

**Math**

The amount of money that a sales person makes varies directly as the total amount of sales made. if the sales person receives $7,500 for selling a house for $120,000, how much will he or she make if he or she sells a house for $150,000?
*April 16, 2009*

**9th grade**

Erin's age is 3 times Warren's. In 4 years she will be twice as old as he will be. How old is each now?
*April 16, 2009*

**Physics-Check**

Nevermind... v2-u2=2as Here a = -9.8 m/s 2 Putting in the values 0 - 225 = 2*(-9.8)*S S = 11.5 m That's it right>
*April 10, 2009*

**Physics-Check**

A missile launches at a velocity of 30.0 m/s at an angle of 30.0* to the normal. What is the maximum height the missile attains? (((30)*cos(30))^2)/(2*9.8) )
*April 10, 2009*

**Physics**

Double check this for me: A player kicks a football with an initial velocity of 3.00 m/s at an angle of 60.0* above the horizontal. What is the horizontal distance traveled by the football? s = vi*t + (1/2)(a)(t2) 0 = 3sin(30)t + 0.5(-9.8)(t2) t = 0.306 seconds x = vt there is...
*April 10, 2009*

**Physics**

Which force acts opposite of the direction of displacement of the object? I think it would be friction...but could it be spring?
*April 10, 2009*

**chemistry**

What do you get when you mix nickel sulfate and sodium carbonate?
*March 5, 2009*

**thesis**

What is the main idea Johanathan Edward's speech Sinners in the hands of an angry god?
*April 3, 2006*

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