# Questions Asked onJuly 26, 2014

1. ## Chemistry

A metal M forms the sulphate M2(SO4)3 . A 0.596 gram sample of the sulphate reacts with excess BaCl2 to give 1.220 g BaSO4. What is the atomic weight of M? (Atomic weights : S = 32, Ba = 137.3)

2. ## Chemistry

A 0.60 g sample consisting of only CaC2O4 & MgC2O4 is heated at 5000C, converting the two salts of CaCO3 and MgCO3 . The sample then weighs 0.465 g. If the sample had been heated to 9000C, where the products are CaO & MgO, what would the mixtures of oxides

3. ## math

x = t − 2 sin t, y = 1 − 2 cos t, 0 ≤ t ≤ 6π Set up an integral that represents the length of the curve.

4. ## Chemistry

Nitric acid can be produced from NH3 in three steps process: I)4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) II)2NO(g) + O2(g) → 2NO2(g) III)3NO2(g) + H2O(l) →2HNO3(aq) + NO(g) % yield of Ist, IInd & IIIrd are respectively 50 % , 60 % & 80 % respectively the

5. ## Chemistry

1 mole of equimolar mixture of ferric oxalate and ferrous oxalate will require xmole of KMnO4 in acidic medium for complete oxidation, x isis: a) 0.5 mole b) 0.9 mole c) 1.2 mole d) 4.5 mole

I am to fill in the blanks without a word bank, my answers are in brackets. 1. A ____ diffraction pattern is unique because it has a larger central maximum. (single slit) 2. the brightest, clearest diffraction pattern is created with a _____ (barrier)

7. ## math

the table below shows some values for the function f. if f is a linear function, what is the value of a+b? table: X | f(x) 0 | a 1 | 12 2 | b

8. ## Chemistry

Suppose 26.0g of sodium bromide is dissolved in 150mL of a 0.60M aqueous solution of silver nitrate. Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the sodium bromide is

9. ## Chemistry

Calculate the number of millilitres of NH3(aq) solution (d = 0.986 g/ mL) contain 2.5 % by weight NH3 which will be required to precipitate iron as Fe(OH)3 in a 0.8 g sample that contains 50 % Fe2O3.

10. ## physics

A jumper of mass m=55 kg starts in a crouched position with the jumper's center of mass at a position y1=0 m. Just before the jumper leaves the floor, his or her center of mass is at y2=0.7 m. From another measurement, you have found that the velocity of

11. ## Algebra

A homeowner wants to fence a rectangular garden using 60 ft of fencing. An existing stone wall will be used as one side of the rectangle. Find the dimensions for which the area is a maximum

12. ## Physics

A butterfly is flying with velocity jˆ i 12 ˆ 10 + m/s and wind is blowing along x axis with velocity u. If butterfly starts motion from A and after some time reaches point B, find the value of u.

13. ## SCIENCE

A conductor of length 0.5m moves in a uniform magnetic field of flux density 2 wbm. at a uniform velocity of 40m/s. Calculate the induced EMF under the following conditions: (1) the conductor moves at right angle to the magnetic field (2) the conductor

14. ## physics

A maass of 0.5kg is attached to one end of the helical spring and produces an extension 2.5cm the mass now set into vertical oscillation of amplitude 10mm the period of oscillation is??....g=10ms2

15. ## trigonometry

Two pulleys have radii 20cm and 6cm,respectively. The smaller pulley rotates 15 times in 12 seconds. Find the angular speed of each pulley in rad/sec

16. ## Life Science

Less-economically developed countries will experience higher birth rates than more-economically developed countries due to A. decreased availability of sanitary water. B. higher infant mortality rate. C. higher literacy rate of women. D. increased

17. ## CHEMISTRY

how to predict that given complex is sp3 dsp2 hybridized because in Mcqs they ask to identify hybridization in given compound

18. ## calculus 2

find dy/dx and (d^2)y/(d^2)x for x=2sint y=3cost 0

19. ## physics

A butterfly is flying with velocity 10i +12jˆ m/s and wind is blowing along x axis with velocity u. If butterfly starts motion from A and after some time reaches point B, find the value of u. Answer this Question

20. ## PHYSICS

A conductor of length 0.5m moves in a uniform magnetic field of flux density 2 wbm^2. at a uniform velocity of 40m/s. Calculate the induced EMF under the following conditions: (1) the conductor moves at right angle to the magnetic field (2) the conductor

21. ## math

A total of 800m of fencing material is used to enclose a rectangular field and to divide the field into four partitions by fences parallel to the width of the field. Find the dimensions of the largest are of the field that can be fenced.

22. ## Chemistry Help

1. Spectroscopic studies of the reaction of azide ion with the cluster [Ru3(CO)12] in acetone solvent confirmed the occurrence of process (i) under a CO atmosphere. Kinetic measurements of this rapid [Ru3(CO)12]+ N3– →[Ru3(NCO)(CO)11]–+ N2(i)

23. ## earth science

Which of the following is not an example of a mineral crystal shape? A. Pyrite B. Kryptonite C. Quartz D. Calcite i think its A am i right

24. ## Algebra

HELP! I am not sure how I would even start this problem or solve it. A hyperbola with a horizontal transverse axis contains the point at (4, 3). The equations of the asymptotes are y-x=1 and y+x=5 Write an equation for the hyperbola.

25. ## Biology

A researcher collects high-resolution photographs of the Earth taken from outer space at annual intervals for the last decade. This data would be most useful to analyze which of the following? A. Human movement during crises B. Migration patterns of large

26. ## Physics

I am to fill in the blanks without a word bank, my answers are in brackets. 1. When light waves reflect from media in which the speed of light is slower, their phase (crest or trough) is ____ 2. The trick to being able to observe interference patterns for

27. ## Spanish use of Imperfect Verbs

Can someone please check if I've used the Imperfect correctly? Thank You :) ¡Ola mis amigos y familias, me llamo Nick y soy en Miravida Soho en Buenos Aires, la ciudad mayor de Argentina! Mis compañeros de viajes y yo pasamos un buen rato hoy. En la

28. ## calculus 2

r=1- 3Sin theta¸ find the area enclosed by the inner loop

29. ## chemistry

*This is part of an exam. so please don't give full solution* just trying to bump ahead of a block. The decomposition of NO2 at room temperature exhibits the following variation in concentration with time: The concentration of NO2 is expressed in

30. ## trig

two poles of height 25 cm & 20 cm are are parallel to each other with a distance of 12 cm between them. what is the distance between the top of the two poles?

31. ## science

Use standard enthalpies of formation to calculate the value of delata H degree for the rxn:NH3(g) + 3F2(g) = NF3(g) + HF(g)

32. ## statistic

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by

33. ## math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -5x2 + 7x + 4. a.{–0.44, 1.84} b.{-5, 7} c.{–1.40, –0.80} d.{–1.25, 1.75} For some reason, I am thinking it is -5,7

34. ## math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x2 + 9x + 5. (a){–1.80, 1.80} (b){-9, 9} (c){–1.00, –0.56} (d){–0.40, 1.40}

35. ## Math

A theater seats 200 people and charges \$10 for a ticket. At this price, all the tickets can be sold. A survey indicates that if the ticket price is increased by a peso, the number of tickets sold will decrease by 10. What price will yield the greatest

36. ## math

A company charges \$200 for each leather bag on order of 150 or less. The cost of each bag is reduced by \$1 for each order in excess of 150 pieces. How many bags on order would result in maximum revenue? What is the maximum revenue?

37. ## Ethics

For Mill, when calculating the utility of any particular action, we must include the happiness it will produce for A. The family of the individual who will perform the action B. All sentient creatures C. The indivvidual who will perform the action D. All

38. ## Math 221

How can I explain how I got the answer. I received the help, but no explanation to how the answer was simplified. 1=1(-7) +b b = 8 In other words, you need to explain what you did to simplify 1=1(-7) + b. This is also true for the perpendicular equation

39. ## Math - trig

Determine the general solution of 8 cos^2x - 4cosx - 1 =0 (8cos^2x - 4cosx)/8 =1/8 cos^2x - 4cosx=1/8 cos^2x/cosx =1+4cosx/cosx cosx = 5 x = cos^-1(5) x = error

40. ## Economics

Of your implicit and explicit costs of attending college, which is more, why?

41. ## College English

John Winthrop “A Model of Christian Charity" Discuss the manner in which the theories expressed by Winthrop are in some degree evident in American government and culture today. CAN SOMEONE TELL ME IF I ANSWER IT RIGHT? In Prospero's America, Walter W.

42. ## medical billing and coding

a new technology that will change the role of the transcriptionist is

43. ## accounting

A city is served by two newspapers—the Tribune and the Daily News. Each Sunday reader purchases one of the newspapers at a stand. The following transition matrix contains the probabilities of a customer’s buying a particular newspaper in a week, given

44. ## chemistry

1. What is the binding energy per nucleon? Why is the binding energy per nucleon, rather than per nuclide, used to compare nuclide stability? 2. When a nucleus forms from nucleons, is energy absorbed or released? Why? 3. Many scientists reacted skeptically

45. ## stats

The ABC Self-Concept Inventory has a split-half reliability coefficient of 0.90, and the XYZ Self-Concept Inventory has a Spearman-Brown reliability coefficient of 0.90. If all other factors are equal, which instrument would you choose to use?

46. ## math

Mr. Brown sold a jacket for \$240, this making a profit of 20% on his cost. Later, he sold another jacket for \$240 this time suffering a loss of 20% on his cost. The result of the two sales was A.He gained \$40.00 B.He gained \$10.00 C.He lost \$20.00 D.He

47. ## chemistry

ph of 6.10mL of 1.20M HCl diluted to 0.560L .

48. ## math

If I have a peice of carpet that is 9 ft by 8 ft and the cost is .59 per square ft how much does it cost for the carpet?

49. ## wavelength

A human's wavelength is similar to the size of: a) a cell b) atom c) nucleus d) proton e) something else and why?

50. ## chemistry

A silicon ribbon measuring 100 micron thick, 5 mm wide, and 1 m long has 5 volts applied across its long dimension. The resistivity of silicon is 640 ohm-m. How much current will flow through the ribbon? Express your answer in Amps

51. ## College Bio

If two parental organisms of genotype pp and PP were crossed, what percentage of F1 offspring would be homozygous recessive? (Assume simple Mendelian pattern of inheritance and unlinked alleles.)

52. ## CHEMISTRY

how to predict that given complex is sp3 dsp2 hybridized

53. ## Math

What is 5/11 minus 7/11

54. ## PHI 208 w33k 3 quiz

Question 3. 3. Harm may be understood as: (Points : 1) financial, physical, and emotional harm. quantifiable harm. direct but not third-party harm. all of the above.

55. ## calculus 2

use the simpsons rule with n=10, arc length y=^3√x, for 1

56. ## POL 201

Those who attended the Constitutional Convention believed that (Points : 1) England was an evil society. America had made a great mistake in fighting the revolutionary war. British institutions of government were good but they became corrupt. America would