enrique
Most popular questions and responses by enrique
chemistry
At a particular temperature, K = 3.75 for the following reaction. SO2(g) + NO2(g)= SO3(g) + NO(g) If all four gases had initial concentrations of 0.840 M, calculate the equilibrium concentrations of the gases.
asked on January 15, 2009 
physics
Starting from rest, a(n)9 kg block slides 9.7 m down a frictionless ramp (inclined at 30◦ from the ﬂoor) to the bottom. The block then slides an additional 23.5 m along the ﬂoor before coming to stop. The acceleration of gravity is 9.8 m/s 2.Find the
asked on November 14, 2013 
Math
Denisha used 9 balls of clay and 16 straws tomake a solid pyramid. How many faces does the solid have?
asked on February 24, 2014 
Hypothesis
Consider testing the hypothesis: H0:ƒÊ=100 vs. Ha:ƒÊ‚100. If the value of the test statistic is equal to 1.36, then the pvalue is: A. 0.4131 B. 0.1738 C. 0.2066 D. 0.9131
asked on November 24, 2010 
Algebra
3.29x=5.5√(x)+10,000 How in the world do I solve for x without using a calculator? I swear I've been on this for hours. I know the answer is 3133 because I estimated the answer and then began plugging in numbers until I got to the actual answer.
asked on July 28, 2015 
Physics URGENT!!!!!!!!!!!!
A bat watcher detects the sound of a hunting greater horseshoe bat at 76 kHz . She knows that this species produces echolocation calls at 80 kHz . What is the speed of
asked on May 5, 2014 
Dr. BOB chemistry help please!
hi At a particular temperature, K = 1.00 102 for the following reaction. H2(g) + I2(g)= 2 HI(g) In an experiment, 1.73 mol H2, 1.73 mol I2, and 1.73 mol HI are introduced into a 1.00 L container. Calculate the concentrations of all species when equilibrium
asked on January 18, 2009 
physics
An approaching train produces the RP1 signal (attention signal) at 600 Hz . The train moves with the speed of 120 km/h. What is the frequency and the wavelength of the sound
asked on May 5, 2014 
Math
Solve the equation by first factoring the quadratic expression. 1. x2+4.5x=0 2. x29x=0 3. x2+10x=0
asked on February 23, 2013 
Math
Solve the equation by first factoring the quadratic expression. 1. x2+4.5x=0 2. x29x=0 3. x2+10x=0
asked on February 23, 2013 
math
using the terms factor, division, multiple, product, and divisible by, write as many statements as you can about the number sentence 4x7=28
asked on September 20, 2012 
6th grade algebra
The largest flying flag is 7410 sq ft and weighs 180 lbs. There are a total of 13 horizontal stripes on it. Let h represent the height of each stripe. What is the value of h?
asked on October 16, 2016 
Math
So if I have a rocket going to a certain height  I know its mass, and I know its total impulse, and the height it reaches how do I calculate for another height? For example, 50Ns is total impulse, mass is 550g, and height is 750m. How do I calculate the
asked on October 15, 2015 
Physics
So if I have a rocket going to a certain height  I know its mass, and I know its total impulse, and the height it reaches how do I calculate for another height? For example, 50Ns is total impulse, mass is 550g, and height is 750m. How do I calculate the
asked on October 15, 2015 
Physics URGENT!!!!!!!!!!!!
An approaching train produces the RP1 signal (attention signal) at 600 Hz . The train moves with the speed of 120 km. What is the frequency and the wavelength of the sound
asked on May 5, 2014 
Calculus
Estimate the area under the curve f(x)=x^2 between x=0 and x=1 using 4 rectangles of equal width if a) The height is taken from the right endpoint b) The height is taken from the midpoint. I have no idea what exactly this question is asking me to do is
asked on March 11, 2012 
8th grade
A JetBlue flight from Jacksonville, FL to San Diego is flying at 500 km per hour west. It encounters a head wind that is moving at 300 km per hour in an easterly direction towards the east. What is the net velocity of the plane, include directions?
asked on September 23, 2009 
Algebra
confirm this is correct bec. when I check it, it doesn't add up the same. 13  3P = 5(3+ 2P) 13  3P =  15 10P 13 = 15 7P 28/7 = 7P/7 4 = P
asked on October 26, 2017 
MATH
If y=7.2 when x=3 find x when y=2
asked on February 9, 2016 
physics
An american system of communication is based on the radio frequency of 76 Hz. Compute the wavelength of theses waves and compare it to the diameter of the earth.
asked on May 5, 2014

math
37.5 Square Route = 878.4  1782.2 = Simplify to nearest concention. = 17.5%
posted on February 11, 2018 
6th grade algebra
It appears critical information is missing. wouldn't we need to know the sq. ft area of the stripes and the length of the stripes? Also, this is an American flag; the sq ft area of the stars is critical but not given.
posted on October 16, 2016 
physics
It's 30,000J
posted on October 24, 2015 
algebra
Well, yes. Do you not understand why that answer is so?
posted on October 16, 2015 
Math
No, it's estimately 15/3
posted on October 15, 2015 
chemistry
Write and balance the equation first.
posted on October 15, 2015 
Math(HELP!)
Yes
posted on October 15, 2015 
Chemistry
Initial concentration of acetic acid is .8326M. The other 2 substances involves, C2H2O2 and H+ or H3O+, will be 0 initially. Since they give you equilibrium concentration of H+, you can just subtract that from the initial acetic acid concentration to find
posted on October 15, 2015 
Physis
x[f]=at^2/2+v[i]t+x[i] Brackets dennote a subscript. You're given x[f], a, t,and v[i]. You can just plug in their values into the formula and solve for x[i]. The horizontal velocity is irrelevant, the height of the tower is the initial position of the
posted on October 15, 2015 
math, PLEASE HELP!
Don't do the string thing, it's not practical. You wanna know how to solve mathematicaly. So I'm gonna assume you know clockwise and counterclockwise, I would hope. Ask if you don't. Say you have point (1,0), and you rotate it 90° clockwise around the
posted on October 15, 2015 
college chemistry
DrBob is right and all but i just had a thought as i solved it about converting. I'd recommend converting feet to cm first since 1cm^3=1mL and that's a lot more convenient, easier to remember, and if you're in the middle of a test chances are its not gonna
posted on August 4, 2015 
Chemistry
From experience, I can say it's negative. Most  if not all  reactions in which an adhesive, glue, cement or whatever you wanna call it hardens, it will be exothermic and entropy goes down. I also asked my chem teacher few months back about that, she said
posted on August 4, 2015 
Spanish
El verano es uno de mis tiempos favoritos del año. Me encantan (encanta) el tiempo y todas las actividades que pueden ser hechas en el venía (verano) . En este ensayo hablaré de lo que solía hacer en el verano cuando era un niño. Entonces (Entonces,
posted on July 29, 2015 
Chemistry
Sorry, 56=[HI+2x]^2/([H2x][I2x])
posted on July 29, 2015 
Chemistry
I'm not sure of what you did, I got different numbers. Do expect me to be wrong though, I haven't done any chemistry since I took the AP chem test in May. The initial, unreacted concentrations I got were .506M H2, .173M I2, and since there is no HI formed
posted on July 29, 2015 
math
So in other words, how many factors of 1000000 are perfect squares?
posted on July 29, 2015 
math
4. If you just move golf to the last 4 days of vacation, he only has 3 days to play croquet, and therefore 4 days can be used for tennis.
posted on July 29, 2015 
Math
Don't quote me on this, but my logic in picking an answer (if you meant inverses instead of integers in your question) is that the equation's roots are a positive and a negative, thte negative having a larger absolute value. This can be seen by the fact
posted on July 29, 2015 
Math
There are 2 answers though. It could also be 10 and 20. I saw this when I solved it by making the quotient of their ages 5 years ago be equal to Joy's age7 in one formula. (2x5)/(x5)=x7 multiply both sides by x5, move everything to one side, and
posted on July 29, 2015 
Math
That's wrong, Steve. You're thinking the length given is the length of the smaller side, but it's actually the length of the diagonal. So one would have to use a^2+b^2=c^2 to find the length of the sides, and from there area can be found. so it'd be a= the
posted on July 29, 2015 
Algebra
It means I wanted to. I really like math and don't enjoy using calculator. Don't get inquisitorial about it, doesn't really matter.
posted on July 29, 2015 
Chemistry
Paula's percent error is over 1000%
posted on July 29, 2015 
Algebra
It didn't say solve without, I just really wanted to figure out a way to show work and to keep my self esteem intact. I did the squaring on both sides, moved everything to one side and made the other side be 0, and used quadratic equation. Thanks ^.^
posted on July 28, 2015 
Math
That's hard bro... Try maybe making 2 eaquations: an even degree polynomial that goes from 0 to 650ish pretty much instantly, and then make a second equation that connects at some point to the first equation. This second equation, I recommend, should be
posted on July 28, 2015 
Chemistry
What DrBob222 said: the step after that is to convert moles of CCl4 to moles of CS2. Seeing as you are still confused after being told the steps, I imagine you don't know how to do that. To convert from moles between substances, cross multiply the moles of
posted on July 28, 2015 
Chemistry
You should begin by calculating the original, unreacted concentrations of H2, I2, and HI. From there you can set up a Kc equation and solve for the change in concentrations, which can be easily used to find the concentrations after equilibrium is achieved.
posted on July 28, 2015 
Foreign Language Spanish
Diagamoslo = le's say it. Decimos el secreto? Si, digamoslo. Let's say it. In this case, LO is a direct objct pronoun. Digamoselo = let's say it to him. The "se" is the indirect object prooun "le" which becomes "se" before the direct "lo,los,la,las". Le
posted on October 5, 2012 
Math
number sence what multiplication fact can be found by using the arrays for 2*9 and 5*9
posted on April 13, 2011