1. chemistry 101

Consider the following reaction. CaO (s) + CO2 (g) = CaCO3 (s) A chemist allows 14.4 g of CaO and 13.8 g of CO2 to react. When the reaction is finished, the chemist collects 19.4 g of CaCO3. Determine the limiting reactant, theoretical yield, and percent

2. chemistry 101

How many grams of oxygen are in 40.1 g of calcium hydroxide? options: 17.3 g 8.64 g 20.1 g 0.541 g 11.2 g

3. physics

A car traveling 95 km/h slows down at a constant 0.80 m/s^2 just by "letting up on the gas. A) Calculate the distance it travels during the second second. B) Calculate the distance it travels during ninth second.

4. Physics

Two point charges are separated by 6cm. The attractive force between them is 22 N. Find the force between them when they are separated by 12 cm.

5. Chemistry

A quantity of gas weighing 7.10g at 741 torr and 44 degrees C occupies a volume of 5.40 L. What is its molar mass?

6. chemistry 101

How many moles of oxygen are in 3.45 mol of diphosphorus pentoxide? options: 5.75 mol O 13.5 mol O 6.90 mol O 3.45 mol O 17.3 mol O

7. Physics

A ball (mass m = 250 g) on the end of an ideal string is moving in circular motion as a conical pendulum as in the gure. The length L of the string is 1.67 m and the angle with the vertical is 37 degrees A) What is the magnitude of the angular momentum (kg

8. Sentance patterns

I have to match the following sentances to the sentance patterns listed 1.Visiting old mine shafts can be an interesting experience. 2.Remodeling this house has become very expensive. 3.The old village sprawled across the green valley. 4.Academic success

9. social studies - history

what was unusual about the landholding policy in the vancouver colony? and why would immigrants from Canada object to such a policy?

10. Trigonometry

log3(x^2)=2log3(4)-4log3(5)

11. Statistics

M&M plain candies come in various colors. According to the M&M/Mars Department of Consumer Affairs, the distribution of colors for plain M&M candies is as follows. Color Purple Yellow Red Orange Green Blue Brown Percentage 18% 19% 21% 9% 9% 6% 18% Suppose

12. physical science

The speed of light is 3 „e 108 m/s (300,000,000 m/s). Red light has a wavelength of 7 „e 10-7 m (0.0000007 m). What is its frequency?

13. physics

A tuning fork produces a wave at 280 Hz and with a wavelength of 1.5 m. Calculate its velocity.

14. Statistics

On a very short quiz, there is one multiple choice question with 5 possible choices (a, b, c, d, e) and one true or false question. Assume you are taking the quiz but do not have any idea what the correct answer is to either question. You mark an answer to

15. Analytical chemistry

What is the reaction & calculation when KIO3 mixed with KI, HCl by titration with Na2S2O3?

16. accounting

Jan. 1 Purchased a small company and recorded goodwill of \$150,000. Its useful life is indefinite. May 1 Purchased for \$90,000 a patent with an estimated useful life of 5 years and a legal life of 20 years

17. physics

An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to and from a table 5.20m away at a constant speed of 2.40m/s, returning just in time to catch the falling

18. Math Calculus

Let C(x) = 0.02x^3 + 55x^2 + 1380. Find the minimum average cost for this commodity. I got to the point where I got x=-1374.98, x=-5.018, x=5 but what do I have to do again after this? Because I am missing some steps after I find x. Do i have to plug all

19. chemistry 101

Lakes that have been acidified by acid rain can be neutralized by the addition of limestone (CaCO3). How much limestone in kilograms would be required to completely neutralize a 5.2 x 109 L lake containing 5.0 x 10-3 g of H2SO4 per liter?

20. chemistry 101

How many molecules of oxygen are produced from the decomposition of 8.75 g of hydrogen peroxide in the following equation Mg + H2O2 --> MgH2 + O2 options: 8.75 x 1024 6.02 x 1023 1.55 x 1022 5.27 x 1024 1.55 x 1023

21. chemistry 101

Determine the empirical and molecular formula for a compound made from 54.09% calcium, 2.72% hydrogen, and 43.18% oxygen with a total molar mass of 222.3 g.

22. chemistry 101

Calculate the empirical formula for the following compound: potassium tartrate found in baking powder: 20.8% K, 2.7% H, 25.5% C, and 51.0% O

23. Computer Science - MATLAB

One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence as a

24. the colony of Vancouver Island to 1858

why did the British Government grant a trade monopoly to the HBC on Vancouver Island ? i really cannot find the answer :/

25. chemistry 101

Given the following dissolving process: Fe2(SO4)3 (s) = 2Fe3+ (aq) + 3SO42- (aq) How many grams of iron (III) ions are produced when 0.450 moles of sulfate ion are produced? options: 50.3 g 16.8 g 50.3 g 37.7 g 75.4 g

26. Shawn

How many milliliters of 0.355 M NaF solution are needed to react completely with 24.6 mL of 0.216 M CaCl2 solution? How many grams of CaF2 will be formed? The reaction is CaCl2(aq) + 2NaF(aq) → CaF2(s) + 2NaCl(aq)

27. Math

A firecracker is launched straight up, and its height is a function of time, h(t)= -14^2 + 112t, where h is the height in feet and t is the time in seconds with t=0 corresponding to the instant it launches. What is the height 5 seconds after launch? What

28. algebra II

The profit made when t units are sold, t>0, is given P=t²-36t+320. Determine the number of units to be sold in order for P>0 (a profit is made).

29. System of Linear Equations

A manufacturer produces three types of radios: deluxe, standard and economy. Each radio uses three different types of transistors: P, Q and R. The deluxe radio uses 2 P's, 7 Q's and 1 R. The standard contains 2 P's, 3 Q's and 1 R, and the economy model

30. linear programming

A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4

31. value of money

You want to have \$1,000,000 in your bank account when you turn 65 years old. Today is your 20th birthday. As a birthday present you received \$27,000 and you want to invest this amount. At what annual interest rate must you achieve to realize this goal?

32. calculus

A rectangular aquarium is to be built with an open top (no material needed) and a square base. You have 60 square feet of material to build it with. (We are assuming that the sides and bottom are perfectly flat). What is the maximum volume that this

33. linear programming

Maximize z = 16x + 8y subject to: 2x + y ≤ 30 x + 2y ≤ 24 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that maximizes the objective function z = 16x + 8y.

34. linear programming

A company is planning to purchase and store two items, gadgets and widgets. Each gadget costs \$2.00 and occupies 2 square meters of floor space; each widget costs \$3.00 and occupies 1 square meter of floor space. \$1,200 is available for purchasing these

35. physics

A space shuttle is launched from rest. It takes 8.00 to reach 155 km/s, and at the end of the first 1.00 km/s its speed is 1550 . What is the average acceleration (in m/s) of the shuttle during the first 8.00 s?

36. System of Linear Equations

A manufacturer produces three types of radios: deluxe, standard and economy. Each radio uses three different types of transistors: P, Q and R. The deluxe radio uses 2 P's, 7 Q's and 1 R. The standard contains 2 P's, 3 Q's and 1 R, and the economy model

37. physics

a force of 4 N acts on a body of mass 2 kg for 4 sec . assuming the body to be initialy at rest . find the distance covered in 10sec after force start acting

38. college math

Using correct mathematical notation and symbols, express the following in set-builder notation: Z = {16, 17, 18, 19, 20}

39. physics

A helicopter is ascending vertically with a speed of 5.20 m/s. At a height of 120 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: v_0 for the package equals the speed of the

40. Economics

Equilibrium is defined as the price at which the quantity demanded and the quantity supplied are equal. In the short run, equilibrium does not always occur. What terms describe disequilibrium? How is subsequent equilibrium re-established

41. math

A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A

42. Math

Expand the following binomials to look for patterns when expanding binomials. Try to find a pattern that will allow you to expand binomials without carrying out all of the steps. (x + 2)3 (2x+1)4 (2x-1)4 (2x-2)3

43. linear equations

A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A

44. linear programming

A feed company is developing a feed supplement from two grains A and B. Each kilogram of A contains 0.3 grams of protein and 0.2 grams of carbohydrates; each kilogram of B contains 0.9 grams of protein and 0.1 grams of carbohydrates. There must be at least

45. value of money

Find the compound amount if \$6,400 is invested for 2 years at 12% compounded monthly. What difference would compounding daily make in this example?

46. Computer Science - MATLAB

I guess it was skipped One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a

47. calculus

Solve the equation 2x^3 + 3x^2 - 6x - 4 = 0, giving the result to four decimal places

48. System of Linear Equations

A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A

What is the numeric value of \$10.25?

50. Math-trig.

1)sinx+cosx=1 2)sinx+cosx=1+sin2x

51. math-trigon.

[1-sin^2(alfa+beta)]/cos^2(alfa+beta)

52. maths

if two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2:3,then the smaller of two angles is

53. Micoreconomics

In recent years, the Internet auction firm eBay has sougth to make its auction technology the favorite of software programmers, and it has begun licensing its technology to other Web sites. The company's managers have pulicly stated that their goal is for

54. MATH

Halley's comet appears in the sky approximately once every 77 years. If the comet was seen in by Astronomer Edmund Halley in 1531. How many times has the comet been spotted since?

55. Geometry

A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 59 people who owned cars. If 19 people owned both a truck and a car and 7 people owned neither, how

56. Math

Ice Dreams finds its profit from the sale of ice cream increases by \$30 per week during the 9 weeks of student summer holidays. Find the profit for the summer season if the profit for the first week of the summer is \$100.

57. linear programming

Minimize z = 3x + 6y subject to: 4x + y ≥ 20 x + y ≤ 20 x + y ≥ 10 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that minimizes the objective function z = 3x +

58. chemistry 101

What is the coefficient for aluminum after the following equation is balanced: Al(s) + O2(g) --> Al2O3(s) options: 2 4 1 3 0

59. chemistry

How many grams of HCl are needed to change 1000 L of water with a pH of 11 to a pH of 5.5?

60. Physics

consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The

61. Trigonometry

v=2(ab+bc+ca), solve for a

62. Probability

according to a poll 14% Americans have tattoos. Find the odds that an American has a tattoo?

63. algebra 2

If Q varies inversely as the square root of R and Q=2 when R=4, what is Q when R is 25? does Q=625 im not sure can someone double check it for me.

64. value of money

Deposits of \$1,000, \$1,100 and \$680 were made into a savings account, the first two years ago, the second 18 months ago, the third 6 months ago. How much is in the account now if the interest on all deposits is 12% compounded semi-annually?

65. value of money

A deposit of \$2,000 earns interest at a rate of 14% compounded quarterly. After two and a half years the interest rate changes to 13.5% compounded monthly. How much is in the account after six years?

66. value of money

Which is a better rate of interest, 16% compounded quarterly or 16 1/4% compounded semi-annually?

67. value of money

At what annual nominal rate of interest will \$6,900 earn \$6,400 interest in five years?

68. Resources For Educating Young Children, Part 1

I have a few more questions to ask they are 1. Mike becomes angry when he can’t solve a mathematical problem, and slams his book down on the desk. Since his behaviour is disruptive to his classmates, you wish to devise a scale by which you can gauge the

69. math

how the distance between centre of circle if: x^2+y^2+2x-2y-11=0 and x^2+y^2-4x+6y-17=0

70. physical science

the moderate temperatures of islands throughout the world has much to do with waters: A. hgih evaporation rate. B. vast supply of thermal enerygy. C. poor conductivity D.high specific heat capacity.

71. math

which is the odd one out? 16 36 64 27 81

72. math

The slope of a line that is perpendicular to a line whose slope is -2/7 is

73. math

Indicate the equation of the line that is the perpendicular bisector of the segment with endpoints (4, 1) and (2, -5).

74. geometry

Indicate the equation of the line through (2, -4) and having slope of 3/5.

75. algebra 2

what is the range of the function F(x)= -(x+2)^2+3 A. y

76. Math

According to a 2008 poll 14% Americans have tattoos. Find the odds that an American has a tattoo? (I got probability of 14/100) 1 - 14/100 then 86/100 X 11/14 ***odds American has a tattoo 7:43*** did I work this problem correctly

77. economics

company A plans to purchase a packaging machine worth 5 million to further fast and up the packaging of their product brand X. the purchase is intended to boost up the loosing sale of the said product which makes 10000 per year. the target of the company

78. math

give an example that demonstrates how much money you are will to spend if I want to spend no less than 6000 and no more than 10000,

79. ATTN: Reiny

How do you write in correct set notation?

80. System of Linear Equations

A medical supply company has 1150 worker-hours for production, maintenance, and inspection. Using this and other factors, the number of hours used for each operation, P, M, and I, respectively, is found by solving the following system of equations. Find P,

81. MATH

1) During the two months of the summer holiday, you find a summer job that pays \$160 per week with a \$10 a week raise. How much money will be made by the end of the summer? 2 Your grandmother offers you \$1 on the first day of March break and offers to

82. Physics

consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The

83. Math Calculus

A sphere is initially measured as having a radius of 4 inches. A subsequent measurement shows that the radius is really 3.99. Find (a) the actual difference in volume between the initial measurement and the correction, and (b) the difference as estimated

84. Composition and Communication

Identify three key strategies to ensure you will choose words correctly in the future to improve your writing.

85. Math

32% of Americans age 25-29 have a tattoo. Find the odss that a 25-29 year old american does not have a tattoo? I used the formula p(no tattoo)/p(tattoo) and got the answer 13.7

86. Math-Can u help me Reiny? So confused :(

A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 59 people who owned cars. If 19 people owned both a truck and a car and 7 people owned neither, how

87. algebra

The cost, in millions of dollars, to remove x % of pollution in a lake modeled by c=6,000/200-2x What is the cost to remove 75% of the pollutant? I am so lost, there are other percents if someone can show me this one I can figure out the other questions.

88. maths

If E the universal set contains all rectangles of length x and breadth y, where x and y are integers and x>y. A contains rectangles with area of 24m2 B contains rectangles , each with length multiples of 3 and area of 24m2. Find n(A), n(B), and n(A ^B)

89. algrebra 2

can someone please help me im stumped on these two. use analytical methods to solve the equation. 1+(1/x)=(42/x²) (7/x-4)=1+(9/x+4)

90. algebra

a ramp rises 2.3 ft vertically and 14.8 ft horizontally express the slope

91. composition and communication II

I don't know how to answer this question. What strategies will I use to overcome challenges of writing a paper?

92. anthropology

how same sex marriage define neo evolution theory.

93. Math

2x^3-3x^2-8x-2

94. Math

What is the numeric value of 10.25?

95. maths

how do u write 7th july 2011 in 5 letters without using numbers?

96. algebra

Can someone please help me? Thanks! simplify the following expression, and rewrite it in an equivalent form with positive exponents(4x^2)-^2

97. algebra

how do you subtract 7.9 from 21

98. Algebra 2

v=2(ab+bc+cd) for a

99. new arthistory submission 26

Compare and contrast Bauhaus and the International Style..

100. matematica

como formar tres numeros diferentes com mais de 22 dezenas e menos de 24 dezenas

101. Math Calculus

The foot of a 30-foot ladder is being pulled away from a vertical wall at a rate of 1 foot per minute. When the top of the ladder is 6 feet from the ground, at what rate is the top of the ladder moving down the wall?

102. College math 115

I need help with my assignment how much will it be to have someone help me with it it is due by tomorrow?

103. chemistry

How many grams of acetic acid (MW = 60 g/mol, pKa=4.75) are needed to change 1000 L of water with a pH of 11 to a pH of 5.5?

104. Math

Given A = {1, 2, 3}, B = {3, 4, 5, 6,}, and C = {3, 5, 7}. Evaluate each set a) A ∩ B b) A U C c) B U C d) (A U B) ∩ C e) A U (B U C) f) (A ∩ B) ∩ C g) (A ∩ B) U C

105. math

Given the following sets, select the statement below that is NOT true. A = {b, l, a, z, e, r}, B = {b, a, l, e}, C = {a, b, l, e}, D = {l, a, b}, E = {a, b, l} a.) E ⊆ A b.) C ⊆ B c.) D ⊆ C d.) D ⊂ B e.) C ⊂ B

106. Algebra 1

Can someone help me do this problem? (The square root of x squared minus 11) + 1 = x.

107. linear programming

A manufacturer produces two items, bookcases and library tables. Each item requires processing in each of two departments. Department I has 40 hours available and department II has 36 hours available each week for production. To manufacture a bookcase

108. value of money

Billy Burnett's grandfather willed Billy \$10,000 payable on his twenty-first birthday. What will be the value of the bequest when Billy reaches 17 years of age if money is worth 8% compounded semi-annually?

109. value of money

Suppose you had three different offers for your used car. One person will give you \$1,000 right now, another offers \$1,200 six months from now and the other offers \$1,600 two years from now. If interest is 16% compounded quarterly, which offer is worth the

110. value of money

At 16% compounded quarterly, how long would it take for money to triple?

111. calculus

Let f(x)= 4x(x+3)^2 - (x+3)^3 and find the values of x that correspond to f(x)=0.

112. soc 207

Discuss the concept of environmental justice; support your discussion with at least one example.