Wednesday
December 7, 2016

# Posts by krys

Total # Posts: 28

Chemistry
Thanks for the clarification and confirming my assumption. I'll be sure to use accurate values in the calculation.
September 21, 2016

Chemistry
So I have to find the % by mass of an unknown metal that reacted with HCl to create MCl2 (with the M being unknown). Then I need to determine identity of the missing metal. I know that the final mass of the compound MCl2 is 12.47g and that the original mass of the metal M ...
September 21, 2016

Calculus
Whoops, sorry about that. It does seem like you still wind up with 1/0. Hmm... let's see when you graph it it looks like it's approaching -infinity so that's probably why you keep winding up with 1/0 since that will give you infinity technically. Also, I don't ...
November 4, 2015

Calculus
Use L'hopitals rule to find the limit. If you take the derivative of the top, and the derivative of the bottom derivative of lnx = (1/x) and the derivative of x = 1 You should be able to eliminate your problem with the 0.
November 4, 2015

Physics
A truck with a mass of 2200 kg, moving at 31 m/s (69 mph), crashes into an immovable wall. It crumples; after the collision, the truck is 0.65m shorter in length than it was before. What is the average speed and how long did the collision last? I was confused on how to start ...
September 7, 2015

Algebra
Mary is y years old. Write an algebraic expression in terms of y for the age of A) her brother, who is 4 years older. B) her mother, who is 3 times as old. C) her sister, who is 2 years younger.
November 13, 2014

Algebra
= (3*6+2s*6)+ 4(s+8) = (18+12s) + 4(8+s) = 18 + 12s +(8 * 4 + s *4) = 18+12s + (32 + 4s) =18+32 + 12s + 4s = 18 +32=50 = 12s+4s= 16s = 2(25+8s) Is my answer right? Thanks
November 10, 2014

Algebra
6(3+2s) + 4(s + 8) =
November 10, 2014

Math
Everyday Ms. Twinkle walks around a park near her house. The park is in the shape of rectangle 2 mi long and 1 3/10 mi wide. How far does she walk?
September 29, 2014

Math
What is 2/3 * 5/6 * 14 = Simplify if necessary
January 28, 2014

physics
A 0.230-kg block along a horizontal track has a speed of 1.70 m/s immediately before colliding with a light spring of force constant 48.0 N/m located at the end of the track. What is the spring's maximum compression if the track is frictionless?
July 4, 2012

Math
6 faces, 8 vertices and 12 edges
November 3, 2011

Math
how many faces does rectangular prism have? and How many vertices does rectangular prism have?
November 3, 2011

statistics
if 20% of the people in a community use the library in one year, find these probabilities. a) at most 3 people used the library b) exactly 3 people used the library c) at least 5 people used the library
August 8, 2011

statistics
if 20% of the people in a community use the library in one year, find these probabilities
August 8, 2011

chemistry/ electrochemistry
1. What is the value of the equilibrium constant for the reaction occurring in the cell shown below at 298 K? Ag(s) | Ag+(aq, 1 M) || Cu2+(aq, 1 M) | Cu(s) Report your answer to four significant figures in scientific notation (1.234E-3 or 1.234E3). Can anyone explain the steps...
April 29, 2011

Chemistry
To determine the value of ÄG°f(AgI2–(aq)), a researcher measured the concentrations at equilibrium to be: [I3–]eq = 4.07 M and [I2]eq = [AgI2–]eq = 0.686 M at 298 K. 2 Ag(s) + 2 I3–(aq) <------> 2 AgI2–(aq) + I2(aq) ÄH°f(kJ/mole...
April 17, 2011

Science Half Lives
2.7 days.. so the answer is 25 g ?
January 25, 2011

Science Half Lives
I am confused about how to claculate half lives. Can you explain. ( How much of a 400 gm sample od gold is left after 10.8 days if the half life is 2.7)
January 25, 2011

Consider a situation in which your car, when coasting down a straight downhill road, acquires a constant velocity. In this situation: a. gravity is the only force on the car b. friction is the only force acting on the car c. the net force acting on the car is zero d. there ...
November 5, 2010

-3674 as stated in Newton's Third Law of Motion
October 3, 2010

history
how did the factors of population,economics,disease and climate shape the basic social conditions and ways of life in both the south and new england?
February 28, 2010

n+3=12 12 - 3 _____ 9 n+3=12 CHECK IT! 9+3=12 9 n=9 +3 ___ 12 TADA!!!
May 27, 2009

physics
sqrt (130^2 + 4500^2) = 4501.8 N tan(angle) (4500.0/130.0)
November 4, 2008

Math
Oh, okay. Well, I've seen this before: 2x + 3y > 0
October 18, 2007

Math
I am in dire need of assistance. Can anyone tell me the forumula/solution to transforming inqualities into equivalent inequalities with y alone on one side? I really don't understand this.
October 18, 2007

Geography/auto Industries
What government imposed barries stop or hinder the export of automobiles? In almost all cases, trade barriers are imposed to restrict IMPORTS. Is that what you meant? India was a prime example, but that situation is changing. There were others.
February 27, 2007

Physics
Look up or derive the frequencies of the standing waves of a length of wire, L, clamped at the ends and under tension. What are the similarities and differences between a vibrating string and a resonating pipe? Does the diameter of the wire matter? Does the diameter of the ...
February 8, 2007

1. Pages:
2. 1