# Questions Asked onNovember 1, 2014

1. ## College Chemistry

Please tell me what I did wrong on this problem: Given the equation Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g), Calculate the number of grams of CO that can react with 0.370kg of Fe2O3 Here's what I did: .370kg x 1000 = 370g of Fe2O3 370g/[(55.85 x 2) + (13 x 3)] =

2. ## Math

A plane leaves an airport X, 20.6degrees east and 36.8 north degrees and flies due south along the same longitude for 8 hours at the rate of 1000km/h to another airport Y, 20.6degrees east and tita degree south. The plane then flies west to another airport

3. ## chemistry

Ima Chemist found the density of Freon-11 (CFCl3) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

4. ## Criminal Justice/Report Writing

What is a common mistake most investigators make in the interview? A. They do not give the interviewee enough time to answer a question before asking another one. B. They break for lunch too early. C. They let an interviewee talk without interruption,

5. ## Math

tariq jogs 63250 m every week. how much will he jog in 149 days? Give your answer km.

6. ## chemestry

consider the reaction 2N2O(g) == O2(g)+2N2(g).which of the following will cause a shift in the equilibrium to the left?

7. ## Math

There h horizontal lines and v vertical lines drawn in a plane. There are r ways to choose four lines such that a rectangular region is enclosed. Given that r is divisible by 1001. Find the minimum value of h+v. I am really not sure where to start.

8. ## Calculus

Assume that a demand equation is given by q=9000-100p. Find the marginal revenue for the given production levels. a. 500 Units the marginal revenue at 500 units is

9. ## Math Help

1.) Use the graph of f to describe the transformation that yields the graph of g. f(x)=10^x g(x)= 10^-x+3 a.) Reflect the graph of f in the y-axis and shift three units to the left. b.) Reflect the graph of f in the y-axis and shift three units to the

10. ## physical science

A gold bar has a mass of 250 grams and is heated from 25 degrees Celsius to 55 degrees Celsius. How much heat did the gold bar absorb? The specific heat of gold is 0.13J/g*degrees C.

11. ## Strayer

A certain test is worth 125 points. How many points (rounded to the nearest point) are needed to obtain a score of 85%?

12. ## math

find the distance between the points (-20,16) and (-15,19). also find the midpoint of the segment that joins the points. what is the distance?_____ what is the midpoint?______

13. ## Thermodynamic

The equilibrium constant of a reaction is determined at 2 different temperatures: at -181°C, Keq = 2770 at -11°C, Keq = 640

14. ## Math

A woman has money in two accounts. One account pays 7% annual interest, whereas the other pays 15% annual interest. If she has $1,500 more invested at 15% than she does at 7% and her total interest for a year is$1,545, how much does she have in each

15. ## Physic

A ceiling fan is rotating at 0.50 rev/s. When turned off, it slows uniformly to a stop in 11 s. (a) How many revolutions does it make in this time? (b) Using the result from part (a), find the number of revolutions the fan must make for its speed to

16. ## Physics

Three particles X, Y, and Z of masses 2 kg, 5 kg, and 4 kg respectively are arranged in order along a straight line. Y is 5.0 m from X and 7.0 m from Z. The distance of the centre of mass of the system of mass from X is? ANS: 6.6 m Help please? I don't

17. ## physics

A 75 kg hockey player glides across the ice on his skates with steel blades. What is the magnitude of the force of friction acting on the skater?

18. ## chemistry

convert the condensed formula to a complete and skeletal structure of the following formula (ch3)2chch2ch3

19. ## history

Check my answers? True/False South Carolina was allowed by Congress to nullify federal tariffs which hurt their economy. False, the Senate came up with a Compromise where federal tariffs would be reduced for SC. One of the most dependable & profitable

20. ## Chemistry

If a calorimeter has a mass of 6.0 g, a specific heat of 2.0 J/(g*C), and it and its contents undergo a temperature increase of 5.5 *C, how much heat is gained by the calorimeter?

21. ## HISTORY

In the mid-nineteenth century new waves of immigrants came to the United States, most of them from ___ and ___. Northern & Western Europe?

22. ## Physics

What is the maximum speed of a 3.40g particle that oscillates between x =2.0mm and x =8.0mm in the figure? (Figure 1) Description of Figure: Parabola with the lowest point at (4,1) parabola starts at(2,5) and ends at (8,5) Y-axis is U(J) X-axis is x(mm)

23. ## chemistry

magnesium metal (1.00 mol) and a volume of aqueous hydrochloric acid that contains .500 mol of HCL are combined and react to completion. how many liters of hydrogen gas, measured at STP, are produced? Mg(s) + 2HCL(aq) -> MgCl2(aq) + H2(g)

24. ## Algebra

If P(x)=4+2sqrt(x+2) and G(x)=4-3X, then what is the largest constant such that P(G(a)) is defined? Thank you!

25. ## Maths

The 4th term of an AP is 6 if d sum of d 8th and 9th term is -72 the common difference is

26. ## calculus

Suppose the volume, V , of a spherical tumour with a radius of r = 2 cm uniformly grows at a rate of dV/dt= 0.3 cm^3/day where t is the time in days. At what rate is the surface area of the tumour increasing? The volume of a sphere is given by V =4

27. ## physics

A dart is thrown horizontally toward X at 30 m/s as shown. It hits Y 0.29 s later. The distance XY in centimeters is:

28. ## algebra

of 320 consumers polled, some purchase Blu-ray movies, some purchase movies on DVD, and some do both. If 300 people polled purchase Blu-ray discs and 280 purchase DVD's and Blu-ray discs, how many people only buy DVD's?

29. ## Physics

1.71 kg of glass (ρ = 2.66 x 10^3 kg/m3) is shaped into a hollow spherical shell that just barely floats in water. What are the (a) outer and (b) inner radii of the shell? Do not assume the shell is thin. Volume = 2.66 * 10^3/1.71 V=1555.56 m^3 V=pi(r^2)h

49. ## Calculus

In 1907 Kennelly developed a simple formula for predicting an upper limit on the fastest time that humans could ever run distances from 100 yards to 10 miles. His formula given by t=.0588s^1.125 where s is the distance in meters and t is the time to run

50. ## math

In the ocean, there are areas where there are very few living things. _________________________ is the term that describes when this happens to a natural area.

51. ## Criminal Justice/Writing Search Warrants

When writing the description for the property you are going to search for, the description must be detailed: A. so the average person can distinguish among similar objects in the search. B. so that only the magistrate and investigator can discern the

52. ## chemistry

The value of ΔH° for the reaction below is -1107 kJ: 2Ba (s) + O2(g) → 2BaO (s) How many kJ of heat are released when 5.75 g of Ba (s) reacts completely with oxygen to form BaO (s)?

53. ## Math

Create your own polynomial with a degree greater than 2.Find the 0's of the function.

54. ## Chemistry

Calculate the solubility of Kcl2 in mole per dm cube of water at 90 dgree celcius if 10grams of the solute will saturate 20grams of water

55. ## MATHS

Each Sunday the hymns to be sung are displayed on a hymn-board using numbered cards. The cards have the digits 0 to 9 on them. The hymn book has 750 hymns in it. Three different hymns are sung each service. a) What is the smallest number of cards the

56. ## Maths Lit, Tourism, Geography, Life Sciences

I want to study Sports Management, so I want to know if its possible with these subjects

57. ## sda high

A population has a mean of 200 and a standard deviation of 50. Suppose a simple random sample of size 100 is selected and is used to estimate μ. What is the probability that the sample mean will be within 5 of the population mean?

58. ## MATHS

Two yummy bars plus three delish bars cost a total of $7.50. Three yummy bars plus two delish bars cost a total of$8.00. How much does one yummy bar cost?

59. ## Chemistry

If you weighed out 0.38 grams of calcium and reacted it with excess amount of HCI how many miles of H2 grams would you expect to produce?

60. ## Science

What is the term use to study the satellite television instruction experiment?

61. ## engineering

should my calculated bulk modulus of a liquid be (-)? the lookup tables i'm comparing the results too have positive values, or is it written without the (-) as a negative bulk modulus is impossible?

62. ## Algebra

Define a#b as the arithmetic mean of a and b. What is the value of ((1#2)#2)#4? Express your answer as a common fraction. The hashtag is just a sign. Thank you!

63. ## Chem

I am still having problems this question 2. Review Examples 7.3 and 7.4, as well as the equation for E in the chapter notes. Suppose an e−1 in an H atom has a transition from n = 3 to n = 2. a. Determine the energy (E) of the released photon. b.

64. ## Chem

An e−1 is released by an electron microscope at 3.00 × 106 m/s. Determine  in meters using the de Broglie relation Substitute kgˑm2/s2 for J and show all units. Then, convert  to pm and show the conversion factor. Determine the kinetic energy

65. ## math

in math problem.how to change simplified fraction form 2/3 to decimal form and percent form

66. ## Math

Find the linear approximation of f(x)=ln x at x=1 and use it to estimate ln 1.12. L(x)= ? ln 1.12 \approx ?

67. ## science

what is scorpius

68. ## computer

program in c++ to convert fahrenheit into centigrade

69. ## MATH

Fraction form 1/3 if changed Decimal form it is 1/3=0.331/3 if changed to Percent form it is 1/3=331/3% Is this correct? I just want make sure.

70. ## Math

If the correct answer is 7.52609, which of the following entries would be counted as correct? That is, which entries are withing Webassigns default tolerance? select all that apply. 7.4 7.3680 7.53 7.458 7.68 7.5938

71. ## math

what **1/8 means?.

72. ## College Intermediate Algebra

The base of a triangle is terms of x is 2x+4x+2 and the height is x2+3x-4. What is the area of the triangle. I need to know am if I'm on the right track Area=1/2(2x+4x+2) (x2+3x-4)

92. ## Criminal Justice/Report Writing

When a violent crime is committed, the investigating officer will attempt to determine the suspect's method of operation. This should be recorded in which face sheet section? A. M.O., or modus operandi B. M.E., or method of entry C. Method of escape D.

93. ## Statistics

We're doing a project. I have all my data, but I'm not sure about what this is asking for. Use your regression equation to determine the purchase price for the 1999 Jeep Grand Cherokee. How does the predicted value, ŷ, compare to the average selling

94. ## Physics

You swing a 2.40kg stone in a circle, using the full length of a thin 60.0cm rope.

if 14W=5R, what does 16W equal?

96. ## Math

the lenght of a rectangular field is thrice its breadth. if the area of field is 7500 m square, find the cost of fencing the field at the rate of RS 10 per meter

97. ## physical eduaction

what can potentially have the most impact on physical education outcomes other than class size? a .type of equipment used b. amount of equipment available c. attitude of the classroom teacher d. lack of funding for equipment

98. ## Chemistry

A 0.2800 g sample of an unknown acid requires 28.22 mL of 0.1199 M NaOH for neutralization to a phenolphthalein point. a.) How many moles of OH- are used? b.) How many moles of H+ are found in the acid? c.) What is the calculated equivalent molar mass of

99. ## UOP

a bond that has a $1000 par value (face value) and a contract or coupon interest rate of 10.9%. The bonds have a current value of$1,120 and will mature in 10 years. The firm's marginal tax rate is 34%. The cost of capital from this bond debt is what

100. ## criminal justice

what is the impact of discretion with respect to the major players (prosecutor, defense attorney, judge, defendant and victim) in the judicial system

101. ## Math

Write an equation of a line that passes through the point (8,2) that is (a) parallel and (b) perpendicular to the graph of the equation y= 4x +3

102. ## MATH

POINT A AND POINT B ARE 5 UNITS APART .THE COORDINATES OF POINT A ARE (3,-9).THE y COORDINATES OF POINT B IS -9 .WHAT IS A POSSIBLE X-COORDINATE FOR POINT B?

103. ## Math

Jane grows several varieties of plants in a rectangular-shaped garden. She uses fencing to divide the garden into 16 squares that are each 1 m by 1 m. She also puts fencing around the perimeter of the garden. What should the dimensions of the garden be so

104. ## AP Calc. AB

If f(x)=2x+sin(x) and the function g is the inverse of f, then g'(2)=?? a. 0.40 b. 0.38 c. 0.34 d. 0.32 e. 0.36

105. ## Criminal Justice/Report Writing

If a Miranda admonishment is needed, the generally accepted method of giving it is to: A. recite the Miranda admonishment from memory. B. give the interviewee a printed Miranda admonishment to read. C. ask the interviewee if he or she already knows the

106. ## Physics

The colors we see when looking at an object depend on the _________. A) density of the object B) amplitude of the light we see C) frequency of the light we see D) mass of the object we are looking at I think it is A

107. ## chemistry

a 0.96 millimole sample of Na2CO3 gave 0.9 millimoles of CO2 gas. If a 0.376 g of pure Na2CO3 was reacted with excess acid, what volume of gas will be measured on this apparatus