# Marty

Most popular questions and responses by Marty
1. ## Chemistry

I'm trying to find if potassium nitrate is polar or non-polar by using the electronegativity scale. Can someone check my work? Electronegativity: potassium: 0.82 nitrogen: 3.04 oxygen: 3.44 =3.44-3.04 =0.82-0.4 =0.4 =0.42 So the final answer is 0.42 and by

2. ## Physics

an electron in a mercury atom jumps from level a to level g by absorbing a single photon. determine the energy of the photon in joules.

3. ## Chemistry

At what temperatures can 40mL of water dissolve the follownig quantities of potassium nitrate? (a) 35.0g (b) 20.0g can anyone start me off with a formula or a hint?

4. ## Chemistry

How many atoms of H are in a mixture of 3.49 x 10^23 molecules of H2O and 78.1g of CH3OH?

5. ## Chemistry

What would be the mass of a bag of anhydrous magnesium sulfate, MgSO4, if it contained the same amount of magnesium as a 1.00kg bag of Epsom Salts, MgSO4 . 7H2O?

6. ## Chemistry

A hydrate of zinc nitrate has the formula Zn(NO3)2 . xH2O. If the mass of 1 mol of anhydrous zinc nitrate is 63.67% of the mass of 1 mol of the hydrate, what is the value of x?

7. ## Physics

Calculate the work done by planet X on its moon. Planet X applies a force of 5.6 x 10^10 N on its moon and the moon is 4.0 x 10^8 km away from the planet and it continues to circle the planet in a circular orbit of circumference of 2.5 x 10^9 m.

8. ## Chemistry re-post URGENT

Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I

9. ## Chemistry

A hydrated MgSO4 salt, weighing 3.211g, is heated in a crucible until reaching a constant weight. The weight of the anhydrous MgSO4 is 1.570 grams. 1. Calculate the moles of H20 removed and the moles of anhydrous MgSO4 remaining in the crucible. 2. What is

10. ## Chemistry

How many atoms of C are contained in 45.6g of C6H6?

11. ## Physics

If you weighed 112 N on the Moon where g=1.6N/kg, how much would you weigh on Earth?

12. ## Maths

In order to make some home improvements, a home owner spent \$40,000. He paid 20% as a down payment and financed the balance of the purchase with a 36-month fixed installment loan with an APR of 7.5%. Determine the home owner’s a) total finance charge and

13. ## Chemistry

1. Water is a polar molecule. Therefore, it acts as a polar sollvent. a) Think about the following compounds: iodine, cobalt (II) chloride and sucrose (C12H22O11). Which compounds are soluble in water. b) Assume that the interaction between solutes and

14. ## Chemistry

6ClO2 + 3H2O -> 5HClO3 + HCl a) If 71g of ClO2 is mixed with 19g of water, what is the limiting reactant? b) What mass of HClO3 is expected in part (a)? c) How many molecules of HCl are expected in part (a)? I completed part a and b but got stuck on part

15. ## Chemistry

The isotopes of argon have the following relative abundances: Ar-36 0.34% Ar-38 0.06% Ar-40 99.66% Estimate the average atomic mass of argon. How would I go about doing this?

16. ## math

Sue wants to frame a picture with a matte of uniform width all around the print. Sue wants the area of the matte to equal the area of the picture. If the print measures 60cm by 40cm how wide should the matte be? let the width of the uniform matte be x cm

17. ## accounting

John's specialty store uses a perpetual inveentory system. the following are some inventory transaction for the month of may 2009. John's purchased merchandise on account for \$5,000. FREIGHT CHARGE OF \$300 WERE PAID IN CASH. JOHN'S RETURNED SOME OF THE

18. ## Calculus

An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200m running track. Find the dimension that will make the area of the rectangular as large as possible.

19. ## Physics

The first and second resonant lengths of an air column that is closed at one end are 15.5 cm and 45.5 cm, respectively. What is the best value for the wavelength?

20. ## Physics

At a height of 3.00 m above the ground, a 0.500-kg ball is thrown with an initial speed of 30.0 m/s in an arc from point A to point C. When the ball is 6.00 m above the ground travelling upward, what is the speed of the ball?

21. ## Physics

A 2500kg car is travelling due west at 30m/s when the brakes are applied, exerting a force of 5000 N [E]. What is the car's acceleration due to the braking?

22. ## Chemistry

Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I

23. ## physics

How much would a 60-kg person weight on the Moon where the gravitational field has a magnitude of 1.6 N/kg?

24. ## Physics

A block M1 of mass 20.0 kg sits on top of a larger block M2 of mass 30.0 kg which sits on a flat surface. The kinetic friction coefficient between the upper and lower block is 0.415. The kinetic friction coefficient between the lower block and the flat

25. ## physics

A rocket ship at rest in space gives a short blast of its engine, firing 26 kg of exhaust gas out the back end with an average velocity of 182 m/s. What is the change in momentum of the rocket during this blast?

26. ## Chemistry

Express each quantity as a mass in grams. a) 3.70mol of H2O b) 8.43 x 10^23 molecules of PbO2

27. ## Physics

An airplane has a takeoff speed of 66m/s. Assuming a constant acceleration of 1.62m/s^2, how long is the plane accelerating down the runway?

28. ## Chemistry

Convert each quantity to an amount in moles: a) 4.27 x 10^21 atoms of He b) 7.39 x 10^23 molecules of ICl

29. ## Math

How do you factor 6a^2 + 17ab + 12b^2

30. ## Math word problem

The cost of producing x bags of pretzels is modelled by C(x)=0.5x^2 + x + 2 where x=# of bags per hundred. State the function that represents the average cost.

31. ## Physics need help now

A daredevil is dead set on jumping the Grand Canyon at its narrowest point (180 meters across). He has set up a ramp at 25 degrees and the ramp's release point is 20 meters above the rim of the canyon. He claims that his bike will be going 40m/s by the

32. ## Math (Functions)

he cost of producing x bags of pretzels is modelled by C(x)=0.5x^2 + x + 2 where x=# of bags per hundred. State the function that represents the average cost. Do you just have to factor it?

34. ## math

Jeff is replacing the tile on his floor. he pans to use square tiles that are 11 inches on a side. the floor is 8 feet long and 6 feet wide. cabinet in the middle of the floor that will not need tile. this space is 2 feet wide and 3 feet long. estimate how

35. ## statistics

The mean score for all individuals who took the Law School Admission Test (LSAT) in 2010 was 155 and the standard deviation was 7. 9. What is the z score for a person, who received an LSAT score of 167? a. +1.71 b. +1.64 c. +1.74 d. -1.71 10.What is the

36. ## physics

A daredevil is dead set on jumping the Grand Canyon at its narrowest point (180 meters across). He has set up a ramp at 25 degrees and the ramp's release point is 20 meters above the rim of the canyon. He claims that his bike will be going 40m/s by the

37. ## Nuclear Physics

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r 2

socialization process of caregivers. what are the implications for patients?

39. ## math

2/6 of the insects were centipedes. 1/2 were millipedes, 12 were flies. How many insects were there? Please explain.

40. ## calculus

If you are blowing up a balloon at a rate of 3 cubic ft per min, what is the rate of change of the radius after 30 seconds

41. ## Math

Mandy got 22 questions correct on her test. Her grade was 80%. How many questions were on the test.

42. ## LOGS (ALGEBRA)

FIND THE INVERSE: f(x) = 10^(5x+3) - 10 f^-1(x) =

43. ## Acct

One of the companies for which you provide accounting services offers office cleaning services and has 8 customers. Cleaning services are provided in the evenings, Sunday through Thursday, at a rate of \$30 per day. Billing is done every Friday. During the

44. ## chemistry

100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.998 g/mL) to determine the mass

45. ## Tech math

The sum of two numbers is 32. Ten more than half of the sum of the numbers is 26. What are the numbers?

46. ## physics

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r 2

47. ## Cultural Diversity

if some one made the following statement Asian americans and pacific islander belong to a single -asian American culture, how would you explain that the statement is a misconception? include whether you think ,most americans believe this misconceptions and

48. ## Physics

If the third harmonic of a standing wave in a vibrating string is 600 Hz, what is the fundamental frequency?

49. ## Physics

The applied force of a 2.0-kg object is 8.4 N [E] and the friction is 2.2 N [W]. What is the motion of the object? Can I use the formula Fnet = ma?

50. ## economics

What changes if any to the current condition of these tools would you make at the next meeting of the Federal Reserve Explain why and the benefitsdrawbacks of this strategy

51. ## Math

Betty is supposed to work the same number of hours each week. One week, she worked 42 hours the first week and 34 hours the second week, how many hours is Betty supposed to work?

52. ## Physics

A model rocket is launched straight upward with an initial speed of 46.4 m/s. It accelerates with a constant upward acceleration of 2.18 m/s2 until its engines stop at an altitude of 138 m. What is the maximum height reached by the rocket? How long after

53. ## statistics

A residential treatment facility tests a new group therapy for patients with self destructive behaviors. To decrease scores of behaviors that has a mean in the overall population of 35 and a standard deviation of 4.7. The mean score for patients after new

54. ## medical coding and billing

discuss coding or obstetrics, including items covered by the global fee for antepartum and pospartum periods of normal pregnancy

55. ## algorithms and logic

i need an example of a peer review of the currency conversion test procedure exercises

56. ## algebra

7r-3s=18 3r+7s=16 Solve by the elimination method, please.

57. ## algebra

Perform and give answer in simplified form Find the product (2x-5)^2

58. ## Algebra

Factor completely 6a-9a^2

59. ## math

why is it necessary to find the gcf of two or more numbers

60. ## Calculus

Find the volume of the cone of maximum value that can be inscribed in a sphere of radius 10cm.

61. ## Physics

A student photographs a 18cm flower so it fills half of a 24mm slide. What is the magnification?

62. ## Significant Digits

(2.7 x 10^2) x (4.23 x 10^2) PLEASE YOU SIGNIFICANT DIGITS!!! thx

63. ## Math

A walking area around a pool is going to be frfinished with a nonslip surface. If it costs \$17 per square foot to install what is the total cost? Inner rectangle is length 20 ft by width 10 ft. Outer dimensions of walkway are 14 length by 10ft. I have no

64. ## math

(1,0) (3,4) (5,8) (7,12) what would be the output value when the input value is 12?

65. ## math

factor 8x^3-8x=0

66. ## WAN

Provide a hypothetical situation for each signal type that illustrates how it could be, or is being, used in a WAN. In what circumstance, for example, would a company choose to use a satellite signal

67. ## us history

How did the automobile change America both geographically and socially?

68. ## SCIENCE

A PIPE FULL DIESEL HAS 5 PSI ON IT, AT 70 DEGREES AND ONE DEGREE OF CHANGE = WHAT PRESSURE

69. ## american history

I need to present arguments for and against imperialism in the 19th century and state if it was UN-American or not.

70. ## american history

What did the Compromise of 1877 have to do with the end of Reconstruction?

71. ## Health

Write a 200- to 300-word response to the following: What is long-term care? Provide an example. What is continuum of care services in the United States? Why is long-term care one of the greatest challenges facing the health care delivery system today?

72. ## chemistry

100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.998 g/mL) to determine the mass

73. ## mat116

G(z)=4z+2 how to work this

74. ## computers

hl=en&lr=&as_qdr=all&ei=pAQqTJXuBsP38AaSnPTRCA&q=how+does+an+information+system+work+what+are+its+people+organizational+and+technological+components+List+and+describe+the+people+organizational+and+technological+components&start=10

75. ## Cultural Diversity

if someone made the following statement asian americans and Pacific Islanders are a model minority, how would you explain that the statements are misconceptions and why or why not. include whether you think most americans believe these mixconceptions, and

76. ## cultural diversity

2-3 consequence situations that are associated with group known as native americans.

77. ## algebra

solve the equation for x 1 + 1 = 1 - - - x 12 8

78. ## havelock high

An object accelerates (changes its speed) only if the forces acting on it in one direction are greater than the forces in the opposite direction, All of the following objects will accelerate EXCEPT? A) a ball striking a wall, in which the force of the ball

A radius and a diameter both have to ___________.

Need weight of Iron vs magnesiium

81. ## Psychology

Describe other measurements sociologists use to calculate prejudice.

82. ## Physics

Two identical charges are 36 mm apart. The electrostatic force between them is 1.3 N. What is the size of each charge?

83. ## Chemistry

What are some factors that affect the solubility of ionic substances?

84. ## math

is 3n^2 - 11n + 6 factorable?!

85. ## Math

x^4 + x^2 - 20 Help! I have no clue how to factor this! Do i have to square root everything?

1. ## History

i go to privavera too

posted on July 17, 2019
2. ## Social Studies

posted on February 8, 2017
3. ## calculus

aren't you supposed to plug everything in AFTER you derive it?

posted on December 16, 2016
4. ## math

x=7.5 y=18.5

posted on November 21, 2016
5. ## 12th grade A.P. Economics

Functioning labor unions

posted on June 9, 2016
6. ## math

2 ounces

posted on January 27, 2016
7. ## equations

3 dimes+1 nickle+2pennies=1quarter+1dime+?

posted on November 13, 2012
8. ## american history

I believe if I had an example of the arguments for and against I would be able to go from there.

posted on August 13, 2012
9. ## physics

I don't quite understand

posted on January 14, 2011
10. ## Calculus questions..really need help, please!

woops i mean this........ the answer to this question is..... OMG KID THAT IS HARD, WHAT GRADE R U IN

posted on November 4, 2008
11. ## Calculus questions..really need help, please!

the answer to this question is OMG THAT ISHARD JESE KID WAT GARDE R U IN

posted on November 4, 2008
12. ## math mesurment

i do not ahve a clue but then again im only in 7th grade

posted on November 4, 2008
13. ## math mesurment

i woudn't know the answer to this ? but i would think there is

posted on November 4, 2008
14. ## math mesurment

is there a ruler thhat is just made for fractions like 1/8ths and lower

posted on November 4, 2008
15. ## Com 220

Actually it is called the SQ3R method, my bad.

posted on August 27, 2008