1. Chemistry

Which equation shows conservation of mass and charge? A.NH4Br → NH3 + Br2 B. 2Mg + Fe3+ → Mg2+ + 3Fe C. H2SO4 + LiOH → Li2SO4 + H2O D. Cu + 2Ag+ → Cu2+ + 2Ag It's either b or d, since they both have two elements with an oxidation number of 0. Which

2. Chemistry

Calculate the mass of NaCl produced when 5.50 moles of Sodium reacts with excess chlorine gas.

3. Physics

the only part i cant figure out is the max static friction force that acts on the block. please help show me how to find it Suppose a block with mass 2.00 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is

4. sociology 101

Using miner's approach describe shoppers in a supermarket

5. Human Relations Part 1

1. Strong language often means A. weak feelings. B. risk-taking. C. strong feelings. D. shared knowledge 2. Which of these statements is true? A. A good attitude can make you tired. B. Being tired makes it harder to have a good attitude. C. A good attitude

6. Chemistry

calculate the total amount of heat needed to change 500g of ice at -10*C into 500g of steam at 120*C. do this by calculating the ehat required for each of the following steps and adding to get the total: step 1. ice (-10C)-> ice (0C) step 2. ice (0C) ->

7. physics

Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric

8. algebra

Who saw the brontosaurus enter the restaurant

9. math

A triangle has a base of 7 ft. and an altitude of 15 ft. Find its area to the nearest tenth. Choose the best answer from the options below: A 52.5 ft² B 53.5 ft² C 54.5 ft² D 55.5 ft²

10. maths

a cube haas a volume of 27cm3 what is the length of one side of the cube

Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric

12. Geometry

A cylinder has a volume of 200in^3 Determine the volume of a cone whose radius and height are equal to that of the cylinder.

13. physics . really need help

An electric iron of 500 W power is used daily for 30 minutes. If the cost per kW.h is \$0.10, what is the weekly expense in using the electric iron??

14. geometry

What is the volume of a square pyramid with base edge 2cm and height of 2cm. I came up with 8 cm^3

15. math 120

a sample of 12 observations taken from a normal distribution produced the following data. 13 15 9 11 8 16 4 9 0 14 16 12 . construct the 95% confidence interval for mean

16. Science

I'm in 6th grade and I need help for my science project. I don't even know what to do. Any fun science projects for 6th graders?

17. math

A circle has a circumference of 110.6 mm. Find its diameter to the nearest tenth. Choose the best answer from the options below: A 35.2 mm B 36.2 mm C 37.2 mm D 38.2 mm

18. maths

a cube has a volume of 27cm3 what is the length of one side of the cube

19. Science

A battery of emf 12v nd internal resistance (r) 1.5votls is connected to an external resistance (R) of 3ohms. (1.) Cal, the current flowing in the circuit. (2,) the p.d draw across the 3ohms resitor and the internal resirtance. (3) determine Voltage of the

20. epidemiology

A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Four hundred (400) people are screened at a clinic during the first year the new test is

21. physics

A ball of mass Ml = 0.250 kg and velocity V01 = +5.00 m/s (see Figure) collides head-on with a ball of mass M2 = 0.800 kg that is initially at rest. No external forces act on the balls. a) What was the kinetic energy of the first ball before the collision;

22. Precalculus

A woman standing on a hill sees a flagpole that she knows to be 60 ft tall. the angle of depression to the bottom of the pole is 14 degrees and the angle of elevation to the top of the pole is 18 degrees. find her horizontal distance to the flagpole.

23. cultural diversity

Will the rate of intermarriage of Blacks and Whites someday reach the same levels as for white ethnics in the US? Does it matter if the rate of Black/White intermarriages does eventually reach the level for white ethnics? Explain your thinking on this.

24. chemistry

in 1807 the English chemist Humphrey Davy passed an electric current through molten potassium hydroxide and isolated a bright, shiny reactive substance. He claimed the discovery of a new element, which he names potassium. In those days, before the advent

25. Precalculus

A woman standing on a hill sees a flagpole that she knows to be 60 ft tall. the angle of depression to the bottom of the pole is 14 degrees and the angle of elevation to the top of the pole is 18 degrees. find her horizontal distance to the flagpole.

26. Social Studies

I just need the answer to one question in Florida Studies week 14. I brought mini assessment home to grade and left the papers at school. Question 13 What di the king of spain do after getting Florida back? I think I know the answer but want to be sure.

27. Math

In triangle ABC, D and E are midpoints of AB and AC, DE=4x and BC=2x+48. Find BC. Thanks So Much!!

28. Math

What is the distance between the parallel planes 2x+y-3z=13 and 2x+y-3z=35?

29. Physics

A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when

30. maths

calculate the surface area of the following prism cuboid; 2cm 6cm 4cm what is the surface area of the cuboid

31. math

A man buys 2pens and 4 pencils and gives a hundred rupees note to shop keeper . Shopkeeper ask him to pay Rs10 more to take 4pens and 2pencils. If he bought 2pens and 3pencils how much would the man get back from shopkeeper?

32. GEOMETRY

FIND THE LATERAL AREA OF A RIGHT PYRAMID WHOSE SLANT HEIGHT IS 18mm AND WHOSE BASE IS A SQUARE WITH AN AREA 121mm^2

33. math

Convert --→ 4.2 g = ______ kg. Choose the best answer from the options below: A 0.42 kg B 0.042 kg C 0.0042 kg D 0.00042 kg

34. math

A trapezoid has bases of 15 ft. and 9 ft. and a height of 8 ft. Find its area. Choose the best answer from the options below: A 95 ft² B 96 ft² C 97 ft² D 98 ft²

35. math

Convert --→ 678,000 cm = ____ km. Choose the best answer from the options below: A 5.78 km B 6.78 km C 67.8 km D 678 km

36. physics

A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when

37. math help

Find the midpoint of A(5, 3) and B(3, -5). Place your answer in (x, y) notation with NO spaces.

38. science

a body is moving with a uniform acceleration travels 24m in the 6th second and 44m in the 11th second. find 1). acceleration 2). uniform velocity of the body

39. Chemistry

Stomach acid is 0.02M HCl. A 330mg antacid tablet is 41% magnesium hydroxide and 36.2% sodium Bicarbonate. What is the volume of acid that can be neutralized by one tablet?

40. History

Create a timeline tracking the major themes/paradigm shifts in American History from the Columbus's voyages through the Mexican-American War (1846-1848

41. Life orientation

In 1oto15 lines critically discuss 5 ways in which the human or enviromental problem impact on the community

42. english

what a business man need to know about nigeria concepts of personal space and rules of social behaviour in order to conduct business successfully in that country

43. math

Find the volume of a pyramid whose base is 6 ft. by 5 ft. and has an 8 ft. height. Choose the best answer from the options below: A 50 ft³ B 60 ft³ C 70 ft³ D 80 ft³

44. geometry

A square pyramid has a volume of 196 cm^3. Determine the height of the pyramid if the edges of the base measures 7cm.

45. calculus

Using an integration formula,what is the indefinite integral of (sign for integral)(cos(4x)+2x^2)(sin(4x)-x)dx. Any help very much appreciated.

46. algebra

How do i solve this complex fraction?? X+3/3x^2/6x^2/(x+3)^2

A clear explanation of drug addiction how human factor that may cause ill health, accidents, crises or disaster.

48. Computers

Why is the popularity of the internet growing more and more everyday?

49. chemistry

i have two questions. 1. generally speaking, if the pressure of a gas is tripled, what will happen to its volume? 2. If I take 2000L of gas at STP and squish it into a gas 15.0L gas cylinder, what will be the pressure inside the cylinder, assuming the

50. math

The area of some shape varies directly with the square of its side. If a shape with 2cm sides has an area 10cm^2,what would be the area of a shape ofthe same type with side of 3cm.

51. Geometry

What is the volume of a right hexagonal pyramid with base edge of 1 cm and height of 2cm Would I use V=BH 6(2)=12cm^3

52. math

Use quadratic formula to solve each equation 3k^2+6=6 I get 3/2 but I can't seem to get the other half of the equation such as x=3.7 or .26 etc...

53. statistics

From a bag containing 6 black and 4 white balls, 2 balls are selected,one after the other,without replacement. Find (a) the probability that they are both black (b)the probability that they are both the same colour, (c) probability that they are different

54. math

Convert --→ 73 yd = _____ ft. Choose the best answer from the options below: A 19 ft B 119 ft C 109 ft D 219 ft

55. Pre-algebra

Hi need help answering this question? In your own words, define the term equation and then explain what it means to solve an equation. Give an example of an equation and its solution. Explain why it is the solution.

56. calculus

Please help. What is the area of the region which is bounded by the x-axis and by the graph of y=(20(7-x)(x-3))/x^2. Thank you for any help.

57. chemistry

How much water must be added to 6.0 mL of a 0.05 M stock solution to dilute it to 0.020 M?

58. Chemistry

Stomach acid is 0.02M HCl. A 330mg antacid tablet is 41% magnesium hydroxide and 36.2% sodium Bicarbonate. What is the volume of acid that can be neutralized by one tablet?

59. maths

calculate the surface area of the following prism cuboid; scm 6cm 4cm what is the surface area of the cuboid

60. Economics

(a) Explain what is meant by the term “natural monopoly”. (b) Construct a diagram showing the average and marginal cost curves, and the demand and marginal revenue curves for a natural monopoly. Use your diagram to explain why profit maximising

61. physics

Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km.

62. chem

An ethylene glycol solution contains 23.9 g of ethylene glycol (C2H6O2) in 86.9 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.)

63. algebra

What is the value of the expression 2x to the 2nd power + 3xy -4y to the 2nd power when x = 2 and y = -4? please show how to solve this

64. math

Convert --→ 678,000 cm = ____ km. Choose the best answer from the options below: A 5.78 km B 6.78 km C 67.8 km D 678 km

65. math

Convert --→ 48 in = _____ ft. Choose the best answer from the options below: A 3 ft B 4 ft C 5 ft D 6 ft

66. math

Convert --→ 14 qt _____ gal. Choose the best answer from the options below: A 1.5 gal B 2.5 gal C 3.5 gal D 4.5 gal

67. physics

Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km.

68. algebra

Annual profit in thousands of dollars is given by the function,p(x)=200square x-3 +10,000,where x is the number of items sold in thousands, x less than 3. describe the meaning of the numbers 3 and 10,000 in the formula. find the profit for 5 different

69. english

Can someone please check my work? Looking for opinions and grammatical errors. Thankyou. The following are my instructions on the assignment..... · Resource: Appendix G · Read two of the five paragraphs provided in Appendix G. · Write a brief paragraph

70. english

which form of verb tense is the underlined phrase in the following sentence? You should have invited them to the party.

71. maths

a prism has a cross sectional area of 8mm2 and a volume of 224mm3 calculate the length of the prism thank you so much for your help

72. math

please help... determine if the argument is valid or invalid along with the appropriate form of argument. if harvard hustles then harvard wins harvard wins ___________________ harvard hustles are these statements: valid by law of detachment valid by law of

73. science

I'm in 5th grade and I'm doing a science project on if seawater can be desalted by freezing... I tested three cups of seawater, each with different times in the freezer.. I have my control which is the seawater at room temperature... What do I chart on my

74. math

(24x^4+24x^3=3x^2)divided 8x^3

How would i go about solving this complex fraction? [(x/3)-4] / [5+(1x)]

76. physics

A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when

77. maths

a prism has a cross section area of 8mm2 and a volume of 224mm3 what is the length of the prism

78. geometry

How do you find the lateral area and surface area of a right prism whose height is 10 ft and whose base is a rombus with diagonals 12 ft and 12sq root of 3 ( DON'T KNOW HOW TO PUT SQROOT 3 IN)

79. us history

abrham lincoln as a young adult

80. mathematics

by prime factorisation method find the least positive number divisible by 700 and 364

81. physics..

Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km. kindly help me to solve this question..

82. Algebra

Can i get some help simplifying this fraction? ((x+5)/(x)) / ((x+5)/(2x))

83. maths

Using your hourly rate computed in part a), what would Mary's gross earnings be for a pay period working an extra 10 hours overtime paid 2 times the regular rate of pay? For full marks your answer(s) should be rounded to the nearest cent.

84. American Government

1. Which of the following is NOT a criticism of the media's influence on public opinion? a. bias in reporting b. negative focus c. watchdog reporting d. visual imagery Answer: b 2. Which of the following is NOT a function of an interest group? a. supplying

85. philosophy

What is the influence of television commercials on American culture? If you could do something about TV commercials what would you do?

86. math am i right?

the polynomial 0.041h - 0.018a - 2.69 can be used to estimate the lung capacity, in liters, of a female with height h, in centimeters, and age a. find the lung capacity of a 60 year old women who is 190 centimeters tall 9.04 liters

87. Microeconomic

(a) Use a normal downward sloping demand curve and an upward sloping supply curve to illustrate and explain the “deadweight loss” from the imposition of a tariff on the imported substitute for a domestically produced product. (b) Use your diagram to

88. Microeconomic

The Urban Transit Authority receives the following two pieces of expert advice: 1. “You should cut rail fares in order to encourage greater use. Raising fares will mean fewer customers and lower revenue.” 2. “You cannot afford to cut fares as this

89. financail Management

In Area O, there will be more savers than spenders. Old people have usually accumulated more wealth and usually tend to have it in more conservative investments (i.e. fixed income instruments), whether they be bank deposits, bonds, etc. In Area Y, people

90. science

WHEN A BOTLE OF ALCHOL SAYES IT IS 80 PROOF WHAT DO THEY MEAN

91. Math

The length and width of the field as a ratio of 11:7. The width is 20 meters less than the length. How many m2 is the area?

92. GEOMETRY

DdETERMINE THE LATERAL AREA OF A PIPE THAT IS 12FT LONG AND 4 INCHES IN DIAMETER

93. Life orientation(Reaseach)

Critically discuss ways in which the woman or enviromental problem imacts the community

94. EDU230

What type of character education would you implement in your school? Why? What would your expected results be.

95. english

Which of the following sentences contains an error? A) The student's attitude did not help her succeed. B) How many students are you planning to hire? C) Student's need to work hard if they want to receive good grades. D) Students' votes are important in

96. Chemistry

A gas at 1.5 atm, 2.3L, and 23degreeC changed to 1.0 atu and 2.8L. What is the new temperature?

97. hrm

What are the critical coponents of a compesation strategy? Would these be the intrinsic and extrinsic rewards or something else.

write the number13 inbase six

99. chemistry

I need to write an equation that takes place at a temp of 400 K and with a catalyst of iron to make ammonia gas from gaseous nitrogen and hydrogen

100. Computers

What are some alternate ways that you can use the Internet?

101. physics of modern technology

while throwing a football you exert a forward force of 50.0n, on it and push it forward a distance of 1.2m, how much work do you do on the football

102. Statistics

Select the best interpretation of the correlation coefficient r = -.87

103. Math

How do you solve the problem: x minus 6.2 is less than or equal to 8 ; x=14