# Questions Asked onApril 24, 2009

1. ## Chemistry

Write formula equations and net ionic equations for the hydrolysis of the following salts in water. a. sodium carbonate b. ammonium bromide I don't know what the products should be. a. Na2CO3+H2O--> ? b. NH4Br+H2O--> ? Please help me with this. I really

2. ## Trigonometry

A painter needs to cover a triangular region 62 meters by 68 meters by 70 meters. A can of paint covers 70 square meters. How many cans will be needed?

3. ## chemistry

How many liters of CO2 form at STP if 5.0g of CaCO3 are treated with excess hydrochloric acid? show all your work

4. ## Chemistry

PartA: What volume of 10.0M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? TrisHCl is a weak base and the molecular weight is 157.67 g/mol. I found the solution, it is 6.67 milliliters. Part B: "The buffer from Part A is

5. ## Chemistry

A sample of 8.00 L of NH3 (ammonia) gas at 22 degree Celsius and 735 torr is bubbled into a 0.500 L solution of 0.400 M (hydrochloric acid). The kb value for NH3 is 1.8 x 10^-5. Assuming all the dissolves and that the volume of the solution remains at

6. ## Quick math question

Can anyone give me a link to a free online algebra test for 9th graders. I have a test on Monday based on algebra to see if I can move on to Geometery and I need a test to see if I'm ready. Thanks

7. ## Science

I have to do a project with a science related career (that doesn't necessarily mean a scientist, but someone who uses science frequently). What do you call a scientist who studies the science of music? I've google this but I couldn't find any results, but

8. ## 11+ maths inverse operation

a = ? 4a + 12 = 7a - 9 please show workings

9. ## physics

An object that is 19 cm in front of a convex mirror has an image located 24 cm behind the mirror. How far behind the mirror is the image located when the object is 12 cm in front of the mirror? I found that 1/Di = 1/-24 + 1/19 - 1/12 = -.07236. And that

10. ## SraJMcGin spanish HELP

RESPONDE a estas preguntas con una condicion. PLEASE REVIEW MY ANSWERS 1. Que vas a hacer este verano? Si My answer= voy a viaja. 2. Que vas a regalarle a tu mejor amigo por su compleanos? Si My answer voy regalare una canta 3. No estas muy contendo con tu

11. ## Stats

A sample of 27 blue M&Ms has a mean weight of 0.8560 grams. Assume that is known to be 0.0565 g. Consider a hypothesis test that uses a 0.05 significance level to test the claim that the mean weight of all M&Ms is equal to 0.8535 grams (the weight

12. ## Geometry

Solve for x x/6 = x+1 / 9 x= 2 Tell whether the lines are parallel based on the given proportions (I think they are supposed to come out equal in order for the lines to be parallel) 16/4 = 8/2 32=32 yes, the lines are parallel 10/4 = 12.5 / 5 50 does not

What do i do when order matters!!?!? The Sad State Lottery requires you to select a sequence of three different numbers from zero through 64. (Order is important.) You are a winner if your sequence agrees with that in the drawing, and you are a booby prize

14. ## Algebra

Factor. 2y^4 + 6y^2 + 5y^2 + 15. I'm having trouble with this one. Please help if you can. Thank you! :-)

15. ## science(chemistry)

I have a question about TLC plate solvents. What solvents will leave stains on a plate with a TLC plate out of the ones below and why?) (n-Octane, n-Hexane, Decane, Acetone, 1-Propanol, 2-Propanol, Ethanol, Toluene, Cyclohexane, Methanol, n-Heptane,

16. ## Science

How is nuclear radiation produced? What are 3 types of radioactive decay and how do they work? Thanks!

17. ## repost Calculus

the length of the curve of intersection of the cylinder (4x^2) + y^2 = 4 and the plane x + y + z = 2 I'm so lost. Any help is appreciated!

18. ## spanish

please check these questions: En la clase de español, los estudiantes van a escribir una _____." a. capítulo b. ejercicio c. composición d. informe D "¿Tomaste la prueba y el examen?" "Sí, _____ tomé." a. lo b. la c. los d. las (i need help on this

What is the 23 pair of chromosomes in a human cell called? Why are they important? Their are the sex chromosomes. They affect the gender. can you check my answer please ,and help me with an answer

1.the flame of the candle or other burning matter always towards upward direction.why? 2.when the photos is taking by looking to the camera and later when the photo printed, why the photo always seems to look at the direction wherever we move around to it?

21. ## Georgia Studies

Can someone check if I answered this question correctly? What is the county unit system? Ans- The county unit system gave each county a number of voting units based on the size of the population. For example, a city that is highly populated could get 8

22. ## spanish

is this correct? "¿Por qué estás triste?" "Porque _____." a. terminaron temprano las clases hoy b. por suerte no hay clases la semana próxima c. hoy no tengo que dar un informe en la clase de historia d. saqué una mala nota en el examen de geografía

23. ## spanish

i need help on this: "Rebeca dice que no tiene que estudiar para el examen." "Yo, sí. No soy _____ ella." a. tan alta como b. tan inteligente como c. mayor que d. más deportista que thanks!

24. ## spanish

please check: Este edificio es alto, y ese edificio es más alto, pero nuestro edificio es _____ de todos. a. el más alto b. el menos alto c. el más bajo d. loa más alta A "¿Conoces a mi amigo Alfredo?" "Sí, pero no _____ muy bien." a. lo conoces b.

25. ## Geometry

Find the values of the variable x in the following proportions 5/3 / 4/3 = x / 20/9 x= 25/9 =2.77777.... 5/4 = x/3 x= 15/4 = 3.75 20/36 / 21/x x= 189/5 = 37.8 Are my answers correct?

26. ## Poetry

Can you tell me one word that would sum up or define the following phrase...."flows easily" ....in relation to poetry....

27. ## Physics (is this right?)

A turnbuckle is needed to apply an 8kN force on a cable. If the efficiency of the turnbuckle is 40% and the force applied is 159.155N with a lever of 20cm in length. a)Find Mechanical Advantage: M.A.=Load/Effort M.A.=8000/159.155 M.A.=50.265 (ans.) b)Find

28. ## spanish

is this correct now? En la clase de español, los estudiantes van a escribir una _____." a. capítulo b. ejercicio c. composición d. informe C

29. ## SraJMcGin spanish HELP

we go on at 730 - i am using this time to do homework performances tonight sat night and sunday and 3 tests on monday - can you please review on especially 6 does tarea have a comma after it and is ir suppose to ire? 1. Que vas a hacer este verano? Si My

30. ## accounting HELP

I know what the moral standards approach is, but what I do not understand how a stakeholder impact analysis might be done using the moral standards approach. Can somebody explain how to do this? I have already gooled it and still did not understand it. I

31. ## SraJMcGin spanish

hi are you still on line? I just got home from rehersal

32. ## penn foster catering

You're likely to encounter formal service in all of the following settings except which one? A. A gourmet restaurant B. A wedding C. A church outing D. A dinner party

33. ## world history

Which event in Europe waher war world 2 was responsible for the beginning of the cold war?

34. ## spanish

please check these for me: Mi abuelo tiene 65 años. Mi abuela tiene 59 años. Mi abuela es _____." a. mayor que mi abuelo b. tan vieja como mi abuelo c. la más vieja d. menor que mi abuelo D "¿Cuántos años tienes?" "_____ quince años." a. tienen b.

35. ## math

the question is: jim ran a mile in 3 min and 43 seconds how fast was his avrage speed. what was his avg. speed if the time was 353

36. ## SraJMcGin spanish HELP

last 3 Instructions: Depende de + sustantivo Depende de si + present Vas a mexico este verano? No se. Depende de mis padres. Possiblemente. Depende de si saco buenas notas. here are the questions HELP PLEASE 1. Vas a salir este fin de semana? 2. Viajaras

37. ## calculus

how do you find the limit as n approaches infinity of n/(2^n + n)?

38. ## SraJMcGin spanish HELP

a few more spanish questions ahora escribe frases donde expresas una condicion con si 1. Si manana cancelamos la escuela my answer viajre a Estados Unidas. 2. Si el ano proximo me dan un carro nuevo my answer viajare a Santa Maria. 3. Si tengo que mudarme

39. ## French

Sra, Can you please check my translations. James is from Alberta but he lives in Vernon, BC of Canada. James est de Alberta mais il habite dans Vernon, BC de Canada. James is 15 years old. James a quinze ans. James has a younger brother named Thomas. James

40. ## Astronomy

1. When comparing the sizes of stars, our Sun is: a.) the largest star discovered to date b.)one of the larger stars discovered to date c.)medium size as compared to other stars d.)one of the smallest stars discovered to date My answer: c or d 2. What

41. ## maths

subtract 3a(a+b+c)-2ab(a-b+c)from 4c(-a+b+c)

42. ## Geometry

Find the value of the variable x in the following proportions 6/x = 9/8 x=48/9=5.333333... 5/5 = 4/x x=4 1/2 = 2/x x=4 x/10 = 10/8 x=12.5 Are my answers correct?

43. ## spanish

is this correct now? "¿Tomaste la prueba y el examen?" "Sí, _____ tomé." a. lo b. la c. los d. las C

44. ## spanish

is this correct? "¿Vas a traer los refrescos?" "Sí. Voy a _____." a. traerlo b. traerlos c. traerlas d. traerla B

45. ## To: SraJMcGin

Please stay on because I have an assignment that needs to be checked. Thanks

46. ## physics

A 2.0 kg block is attached to the end of a spring with a spring constant of 350 N/m and forced to oscillate by an applied force F = (15 N)sin(ωt),where ω = 35 rad/s. The damping constant is b = 15 kg/s. At t = 0,the block is at rest with the spring at

Discuss the physiological myths about hunger and satiety and those physiological factors that do contribute to hunger and satiety.

48. ## alogorithms

ch. 5 program problems 1 n 2

49. ## Accounting PLEASE LOOK THIS OVER!

Describe how you might conduct a stakeholder impact analysis of Scenario 1 of using each of the stakeholder impact analysis approaches: moral standards, 5-question and Pastin’s approach. Note: You are not required to analyze the impact on each

50. ## spanish

is this correct? Los estudiantes tienen que hacer fila para entrar en el _____. a. asiento b. oficina c. cafetería d. auditoria D?

51. ## college

how to work symbolic representatios? i need to find the domain and range

52. ## French

Could you please check these thanks Directions: Use the form of mettre Qu'est-ce que tu mets pour aller à l' école? Answer: Je mets un polo bleu marine, un pantalon kaki, et des sandales blanche. Qu'est-ce que vous mettez tous pour faire de la

53. ## Math

I need some data that could help me explain the following: Why the line x = 4 is a vertical line?