# Jojo

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

16. You have a series of four chemical reactions (1--> 2 --> 3 --> 4). How do you calculate the H2 if you know the other H values? H2 = (H1)(H3)/(H4) H2 = H4 (H1 + H3) H2 = H1 + H3 + H4 H2 = H1 + H3 H4

2. ## Math

Marcus bake loaf of bread of banana bread for a party he cut the loaf into equal size . At the end of the party there were 6 pieces left . Explain how you can find the number of pieces in the whole loaf if Marcus told 1/3 of the loaf was left

3. ## Chemistry

17. You have the following equations: 2S (s) + 3O2 (g) 2SO3 (g), H = 792 kJ 2S (s) + 2O2 (g) 2SO2 (g), H = ? 2SO2 (g) + O2 (g) 2SO3 (g), H = 198 kJ What is the missing H?

4. ## Math HELPP!!!!

as a part of a geometry assignment john drew an equilateral triangle. which of the following dimensions could reprent the side length of the triangle john drew? 10,11,12 13,15,17 16,18,21 17,17,17•• Correct me!!

5. ## physics

A spherical bowling ball with mass m = 4.1 kg and radius R = 0.116 m is thrown down the lane with an initial speed of v = 8.9 m/s. The coefficient of kinetic friction between the sliding ball and the ground is ¦Ì = 0.34. Once the ball begins to roll

6. ## Linear Approximation

Use linear approximation, i.e. the tangent line, to approximate 1/0.104 as follows: Let f(x)=1/x and find the equation of the tangent line to f(x) at a "nice" point near 0.104 . Then use this to approximate 1/0.104 . L(x)=f(a)+f'(a)(x-a)...i think. You're

7. ## Math PLZZZ HELPP MEE!!!

the area of the parallelogram. Quadrilateral top: 5 cm side: 14 cm length: 12 cm *38 cm2 *60 cm2 •• *70 cm2 *168 cm2 3. Find the perimeter of the parallelogram. Quadrilateral top: 10.8 ft side: 5.1 ft length: 2.3 ft *15.9 ft *24.84 ft *31.8 ft ••

8. ## Math. PLZZZ HELP ME!!!

Jackson made a poster in the shape of a quadrilateral. Opposite sides of the poster are congruent and parallel. Which of the following names the shape of Jackson’s poster? A.square B.rhombus C.rectangle D.trapzoid•• Correct me

9. ## Chemistry

12. In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed? q = mCHf I am having a lot of trouble on this type of problem in chem. Help and an explanation would be greatly appreciated. Thank you.

10. ## chemistry

If there are 80 milligrams of a radioactive element decays to 10 milligrams in 30 minutes then what is the elements half life in minutes? Ok i narrowed it down to either 10 or 30...but im rly confused so if u could help it wuld be grea 80 40 1 min 20 2 min

11. ## math

Certain investments compound interest at different intervals. What effect does the size of the compounding interval have on the yield of the investment?

12. ## Social Studies

The principle of _____ in the U.S. Constitution means that the power of each branch of government is limited by powers of other branches. The principle of _____ means that power is distributed between state and national governments. PLEASE HELP ME!!!!!!

13. ## physics 1

The base of a pyramid covers an area of 13.0 acres (1 acre = 43,560 ft2) and has a height of 481 ft. If the volume of a pyramid is given by the expression V = (1/3)bh, where b is the area of the base and h is the height, find the volume of this pyramid in

14. ## physics

When a driver presses the brake pedal, his car stops with an acceleration of -8.7 m/s2. How far will the car travel while coming to a complete stop if its initial speed was 10 m/s?

15. ## Math HELPP!!

Eric Drew and up to's triangle. Which of the following could be true for Eric's triangle. A: all three angles have equal measures B: possible angle measures of the triangle are 92, 48, and 40•• C: two of the angles are equal, and the third angle has a

16. ## English

We laughed at the colorful ball. Is this sentence structurally ambiguous?

17. ## physics

A centrifuge in a medical laboratory rotates at an angular speed of 3,550 rev/min. When switched off, it rotates through 54.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.

18. ## chemistry

The partial pressure of O2 in your lungs varies from 25 mm Hg to 40 mm Hg. What mass of O2 can dissolve in 1.0L OF water at 25.0oC when the O2 partial pressure is 40. mm Hg?

19. ## Stat

when you are comparing two sets of data, and one set is strongly skewed and the other is symmetric, which measures of the center and variation should you choose for the comparison?

20. ## chemistry

A 35.0g sample of ethylene glycol is dissolved in 500.0g of water. The vapor pressure of water at 32C is equal to 35.7mm Hg. What is the vapor pressure of the water-ethylene glycol solution at 32C?

21. ## U.s GOVERMENT

Which Enlightenment thinker wrote that people in society are bound to one another by an implicit 'social contract'? A. Voltaire B. Marie Arouet C. Jean-Jacques Rousseau D. Thomas Paine

22. ## history

How were the Spanish able to conquer two great empires with only a handful of soldiers? First, the Spanish had superior military equipment. They were protected by steel armor and had guns. The Aztecs and Incas relied on clubs, bows and arrows, and spears.

23. ## physics

In a circus performance, a large 5.0 kg hoop of radius 3.0 m rolls without slipping. If the hoop is given an angular speed of 3.0 rad/s while rolling on the horizontal and allowed to roll up a ramp inclined at 10° with the horizontal, how far (measured

24. ## algebra

a building in a city has a rectangular base. the lenght of the base measures 70 ft less than twice the width. the perimeter of this base is 820 ft.

25. ## Stat

1) one indicator of a outlier is that an observation is more than 2.5 standard deviations from the mean. Consider the data value 80. (a) if a data set has mean 70 and standard deviation 5, is 80 a suspect outlier? be sure to work that explains your answer

26. ## American History

Check my answers? 1. In what way was the government of ancient Athens different from the united states A) Athens was a direct democracy in which citizens ** B) Athens was an oligarchy ruled by the wealthy members of the council of five hundred C) Athens

27. ## Art

Which traits is not symbolized by chinese dragons? Wisdom Benevolence Evil Adaptability •• Correct me

28. ## chemistry

A scientist measures the standard enthalpy change for the following reaction to be -172.4 kJ : 2SO2(g) + O2(g) 2SO3(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of SO2(g) is

29. ## Math PLZZ HELP ME!!

Can someone please explain me how to construct a perpendicular bisector!

30. ## chem

at a depth of 100m underwater the water pressure is equal to 10 atm of pressure. what is the partial pressure of N2 at a pressure of 10 atm?

31. ## chem 111

What is the molarity of a solution of 10.0% by mass cadmium sulfate, CdSO4 (molar mass = 208.46 g/mol) by mass? The density of the solution is 1.10 g/mL.

32. ## AP STATISTICS

Mens shirt sizes are determined by neck sizes. suppose the mens nexck sizes are approximatley normally distributed with mean 15.7 inches and standard deviation 0.7 inch.retailer sells men shirts in S,M,L,XL where the shirt sizes are defined in the table

33. ## chemistry

The vapor pressure of ethanol is 54.68 mm Hg at 25oC. How many grams of chlorophyll , C55H72MgN4O5, a nonvolatile, nonelectrolyte (MW = 893.5 g/mol), must be added to 207.6 grams of ethanol to reduce the vapor pressure to 53.60 mm Hg ? ethanol = CH3CH2OH =

34. ## math

explain how you would write the number that is 2 tens more than 53?

35. ## Social Studies

1. A photograph shows a multiple-story stone building with several tall openings. It shows that the openings have rounded top edges, and that they are framed by pillars. Which elements of this building reflect architectural developments during the

36. ## science

how do scientists explain the fact that some landforms that are far apart and separated by oceans appear to be related?

37. ## 4gr math

write 7026 in expanded form. then use words to the number

38. ## chemistry

The concentration of CO2 in an unopened soda can is 0.0506 m at 25 C. What is the partial pressure of CO2 gas in the can?

39. ## physics

A playground merry-go-round of radius 2.00 m has a moment of inertia I = 255 kg·m2 and is rotating about a frictionless vertical axle. As a child of mass 25.0 kg stands at a distance of 1.00 m from the axle, the system (merry-go-round and child) rotates

40. ## physics

A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 205 mi/h in 2.70 s. (a) Find the average acceleration of the plane. (b) Assuming the acceleration is constant, find the distance the plane moves.

41. ## Physics

two converging lenses placed L1=20 cm apart. the focal lengths are f1=10 cm and f2=20cm 1) where is the final image located for an object that L2=30cm infront of the first lens? 2)what is the total magnification of the lens system? *diagram*

42. ## s. economics

Brooke and Georgia are neighbors. Each have 40 hours per week. Brooke needs 5 hours to paint a beautiful picture and 2 hours to make a picture frame. Georgia takes 8 hours to paint an equally beautiful picture and 4 hours to make a picture frame. What two

43. ## Fundamentals of Electricity

The box-like Gaussian surface of Fig. 1 encloses a net charge of +24.0ε0 C and lies in an electric field given by N/C, with x and z in meters and b a constant. The bottom face is in the xz plane; the top face is in the horizontal plane passing through y2

44. ## Art

according to egyptian mythology horus son Kebehsenuef fit who has the head of a hawk. what characteristic might make Kebehsenuef fit for the job of watching a dead mummy vital organs? A kind and caring heart The keen eyes of a bird of pray Ingenuity A

45. ## physics

An air puck of mass m1 = 0.24 kg is tied to a string and allowed to revolve in a circle of radius R = 1.4 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of m2 = 1.3 kg is tied

46. ## algebra

Give an example of an open equation? my answer is, x + 4 = 7 Until the value of x is found, it is unknown whether the equation is true or false. am i right?

47. ## physics

The system of small objects shown in the figure below is rotating at an angular speed of 2.0 rev/s. The objects are connected by light, flexible spokes that can be lengthened or shortened. What is the new angular speed if the spokes are shortened to 0.15

48. ## math

washington school cost about \$12,350,000 to build. use words to write that amount of money. 24. two factors of 16 are 1 and 16 beacuse 1*16= 16. find three more factors of 16.

49. ## Chemistry

For my homework the question is... What is the half life of polonium 214 if a 1 gram sample decays to 31.25mg after 820 seconds? Im not sure how you arrive at the answer, my friend says the answer is 5 but were not sure how to do it..thanks for any help u

50. ## Social Studies

explain whether conflict was unavoidable in Colombia. Why or why not? i don't understand.

51. ## math

Find the largest angle for which sine and tangent agree to within two significant figures. Please explain ^_^

52. ## Art

Which of the best definitions of personification? Giving animals and objects human characteristics•• Developing new characteristics of Personality Giving yourself the characteristics of someone else Giving human characteristics of animals Correct me if

53. ## physics

A marble is flicked horizontally off a desk with a speed of 3.1 m/s. If it takes the marble 0.8 seconds to hit the ground, how far from the desk does it land?

54. ## math

a ship leaves point A and travels 60 miles due east, then travels northward 59 degrees to point C, and travel 60 miles to point C, find the distance from point A to point C

55. ## Chem 10

Calculate the value of the following in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter the correct number of significant figures. (2.700e2 cm)3 / (1.20e3 cm)2 Can't understand how many sig figs.

56. ## math

a quarter after four in the afternoon in digital form

57. ## Algebra 2

Evaluate the function when x=1. f(x)=4x-2. Write the input and output as a set of ordered pairs, and identify the domain and range of the ordered pair. (6 points) Ordered Pair: Domain: Range: Write an equation of direct variation that passes through the

58. ## chemistry

nitrosyl bromide, NOBr is formed from NO and Br2-. Experiments show that this reaction is second order in NO and first order in Br2. what is the rate equation for this reaction?

59. ## math

how often does a leap year occur? what are al the prime numbers less then 12. what is the eighth multiple of 32? is the last digit of the multiples if 4 odd or even? what are the six factors of 12? what are the factors of 16. two factors of 20 are 1 and

60. ## managerial finance

Completed all answers except the last one and I am stuck. Can someone please show me how to solve? I can't figure it out and I would like to have the steps so I can learn how to solve. Thank you! Jiminy's Cricket Farm issued a 30-year, 7.2 percent

61. ## math

100 eighth grade students were interviewed about their favorite subject at school. 45 said Math, 70 said English, and 5 said neither. Using a Venn diagram, how many said both?

62. ## math

Multiplying 2.1 and the number r results in 6.174. What is the value of r? Drag and drop the correct number into the box so that the equation is true.

63. ## pysics

A 50.0-kg child stands at the rim of a merry-go-round of radius 1.65 m, rotating with an angular speed of 3.00 rad/s. (a) What is the child's centripetal acceleration? m/s2 (b) What is the minimum force between her feet and the floor of the carousel that

After a meal at a child care center ,the left over hot food that has been in serving bowls that have been on the table should be: a.chilled, refrigerated and used at another meal b.reheated, cooled and frozen for later use c.discarded d.heated in a

Which one of the following major concepts is NOT included in the conceptual framework on which education nutrition is based? a.nutrition is how the body uses food b.food is composed of nutrients required for health c.every person needs a variety of

66. ## Maths

Tan theta = 5/12 find the value of cosec theta

67. ## history

What is the mayflower compact? A. a long-term treaty for trade routes with the duch tea company B. a formal method to establish systematic order on the pilgrams C. an economic agreement to freely make and sell goods to the british D. a formal agreement by

68. ## physics

A 1400-N uniform boom at ϕ = 70.0° to the horizontal is supported by a cable at an angle θ = 20.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight w = 2250 N hangs from its top. (a) Find the

69. ## math

Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not change. C. A particle

70. ## history

French took the lead in colonizing the upper Midwest region. From the early 16th century on, French soldiers, missionaries and fur traders left their slight mark upon the St. Lawrence Valley, the upper Great Lakes and points west. For the early French

71. ## Chemistry

8) ( 1 point) What is the maximum number of grams PH₃ that can be formed when 3.4 g of phosphorus reacts with 4 grams of hydrogen to form PH₃? P₄ (g) +6H₂ (g) → 4PH₃ (g) * 3.7 g 6.8 g 45 g 270 g 10. Lead nitrate can be decomposed by heating.

72. ## chemistry

calculate the Henry's law proportionality constant for N2? partial pressure at 1 atm=0.78 atm solubility at 1 atm= 5.3 x 10^-3 mol/L

73. ## physics

A rotating wheel requires 6.00 s to rotate 27.0 revolutions. Its angular velocity at the end of the 6.00-s interval is 97.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel?

74. ## algebra

Give an example of an open equation? my answer is, x + 4 = 7 Until the value of x is found, it is unknown whether the equation is true or false. am i right?

75. ## Math

Julie owns a video store. Her monthlyexpenses, including rent, average \$1,185. This year she made \$34,620 in revenue. What is the difference between her average monthly revenue and her average monthly expenses? HELP

76. ## 4gr math

an adult cheetah weighs about 130 pounds. an adult mountain lion weighs about 170 pounda. a student estimates that a mountain lion weighs about twice as much as a cheetah. is the estimate reasonable? explain why or why not

77. ## math

leah wants to put square floor tiles that measure one foot on each side in a room that is 9 feet and 9 feet wide. How many floor tiles will leah need? is your answer reasonable? explain why

78. ## Language Arts

How do you know squeaky won't let gretchen win in Raymond's Run

79. ## physics

Suppose a 1800-kg car passes over a bump in a roadway that follows the arc of a circle of radius 18.4 m as in the figure shown below. (a) What force does the road exert on the car as the car passes the highest point of the bump if the car travels at 9.24

80. ## Art

according to egyptian mythology horus son Kebehsenuef fit who has the head of a hawk. what characteristic might make Kebehsenuef fit for the job of watching a dead mummy vital organs? A kind and caring heart The keen eyes of a bird of pray •• Ingenuity

81. ## economic

1 THE COPPERBELT UNIVERSITY SCHOOL OF BUSINESS BSP 110 PRINCIPLES OF ECONOMICS 2015 ASSIGNMENT DUE DATE: 4th January 2016 at 10am QUESTION A manufacturing firm in Kitwe has a normal demand curve given by Q = 5,000 – 100P and its total cost curve in the

82. ## math

use digits to write four hundred seventy-five thousand three hundred forty-two. then circle the digit in the ten-thousands place

83. ## physics

A jet plane lands with a speed of 81 m/s and can accelerate at a maximum rate of −5.00 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? (b) Can this plane land on a

84. ## Chemistry

1. What would be the effect on the reaction rate if the [O2] were doubled? 2. What would be the effect on the reaction rate if the pressure on the reaction were doubled? 3. Assume the reaction is reversible and at equilibrium. What shifts in the

85. ## college chemistry

An electrical heater is used to add 19.50 kJ of heat to a constant-volume calorimeter. The temperature of the calorimeter increases by 4.50°C. When 1.75 g of butanol (C4H9OH) is burned in the same calorimeter, the temperature increases by 14.58°C.

86. ## chemistry

Use the concepts of effective nuclear charge, shielding, and n value of the valence orbital to explain the trend in atomic radius as you move across a period in the periodic table.

87. ## Algebra

x^2+4x-24/x-3

88. ## gtuc

1. WRITE A PROGRAM TO CALCULATRE THE AREA OF A RECTANGLE OF LENGTH =5 CM AND BREADTH=8CM. 2. CALCULATE THE PRICE OF AN ITEM COSTING 100 GHANA CEDIS AFTER A DISCOUNT OF 10% IS APPLIED TO IT. 3. WRITE A PROGRAM TO CALCULATE THE SIMPLE INTEREST ON A LOAN

89. ## Science

In the ocean, there are area's where there are very few living things. _______ is the term that when this happens to a natural area.

1- the vinegar soltion sold in the store is about 5% acetic acid. Assuming that the solution has a density of 1.01 g/mL, calculate the pH of vinegar.

91. ## math

8. in the 2004 presidentail election, 4651 residents of the state of rhode island voted for candidate ralph nader. round that number of residents to the nearest thousand, to the nearest hundred, and to the nearest ten.

92. ## chemistry

If a 0.01M Mn(NO3)2 solution has an ammonia concentration of 6.0M, would a precipitate form? Calculate the ion product and compare to Ksp.

93. ## geometry

Adelina is creating a piece of art that is in the shape of a parallelogram. its dimensions are 35 inches by 28 inches and one angle is 80 degrees. find the lengths of both diagonals.

94. ## accounting

Bryan company budgets sales of 1,800,000, fixed costs of 1,000,000 and variable costs of 1,080,000. what is the contribution margin ratio for Bryan Company

95. ## science-biology

name two processes for which DNA is responsible for what are the three components to a DNA nucleotide

96. ## algebra

PLEASE HELP ITS URGENT Pizza costs \$1.50 per slice. Use a table and an equation to represent the relationship between the number of slices of pizza bought and the total cost.

97. ## Science

How should I prepare for a field study and what should I do if there's an accident?

98. ## math

While working on the roof of his house, John leans a 15 foot ladder against a second story window. If the distance on the ground between the base of the ladder and the house is nine feet, at what height does the ladder reach the second story window? In

99. ## physics

A person bending forward to lift a load "with his back" (Figure (a)) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force