enrique

Most popular questions and responses by enrique
1. 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.

2. 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

3. Math

Denisha used 9 balls of clay and 16 straws tomake a solid pyramid. How many faces does the solid have?

4. 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 p-value is: A. 0.4131 B. 0.1738 C. 0.2066 D. 0.9131

5. 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.

6. 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

7. 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

8. 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

9. Math

Solve the equation by first factoring the quadratic expression. 1. x2+4.5x=0 2. x2-9x=0 3. -x2+10x=0

10. Math

Solve the equation by first factoring the quadratic expression. 1. x2+4.5x=0 2. x2-9x=0 3. -x2+10x=0

11. math

using the terms factor, division, multiple, product, and divisible by, write as many statements as you can about the number sentence 4x7=28

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?

13. 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

14. 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

15. 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

16. 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

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?

18. 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

19. MATH

If y=7.2 when x=3 find x when y=2

20. 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.

1. math

37.5 Square Route = 878.4 - 1782.2 = Simplify to nearest concention. = 17.5%

posted on February 11, 2018

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
3. physics

It's 30,000J

posted on October 24, 2015
4. algebra

Well, yes. Do you not understand why that answer is so?

posted on October 16, 2015
5. Math

No, it's estimately 15/3

posted on October 15, 2015
6. chemistry

Write and balance the equation first.

posted on October 15, 2015
7. Math(HELP!)

Yes

posted on October 15, 2015
8. 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
9. 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

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
11. 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
12. 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
13. 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
14. Chemistry

Sorry, 56=[HI+2x]^2/([H2-x][I2-x])

posted on July 29, 2015
15. 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
16. math

So in other words, how many factors of 1000000 are perfect squares?

posted on July 29, 2015
17. 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
18. 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
19. 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 age-7 in one formula. (2x-5)/(x-5)=x-7 multiply both sides by x-5, move everything to one side, and

posted on July 29, 2015
20. 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
21. 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
22. Chemistry

Paula's percent error is over 1000%

posted on July 29, 2015
23. 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
24. 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
25. 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
26. 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
27. 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
28. Math

number sence what multiplication fact can be found by using the arrays for 2*9 and 5*9

posted on April 13, 2011