# Lauren

Most popular questions and responses by Lauren
1. ## Art

A sculptor creates a bust of a famous politician out of marble and places it in the outdoor courtyard of the Capitol building. Why did he choose marble A-he wants to honor the politician by using an expensive material B-marble is cheap and easy to find

2. ## Chem

Give the ideal bond angle for BrO3- ion? I know this has trigonal bipyramidal geometry and therefore the bond angle is < 109.5. Is there a way to determine a more specific bond angle?

3. ## Chemistry

Complete this Bronsted-Lowry reaction, placing each product by it's appropriate label. HSO4- + BrO- ____ (ACID) + ____ (BASE)

4. ## English

Since words have multiple meanings, the context of a word often provides clues to its meaning better than the dictionary's definition. In the following lines from Anne Bradstreet's poem "To

Three masses are connected by a string. M1 = 1.0kg M2 = 2.0kg M3 = 3.0kg Mass one and two are on a table while mass three hangs off the edge of the table (there is a pulley). Find the tension in the string connecting m1 and m2. Assume the table is

6. ## Chemistry

A 0.1873 g sample of a pure, solid acid, H2X was dissolved in water and titrated with 0.1052 M NaOH solution. The balanced equation for the neutralization reaction occurring is H2X(aq) + 2NaOH(aq) ¨ Na2X(aq) + 2H2O(l) If the molar mass of H2X is 85.00

7. ## Physics w/ Calc

A baseball approaches home plate at a speed of 43.0 m/s, moving horizontally just before being hit by a bat. The batter hits a pop-up such that after hitting the bat, the baseball is moving at 54.0 m/s straight up. The ball has a mass of 145 g and is in

8. ## chemistry

what is the total mass of LiBr required to make 500.0 grams of an aqueous solution of LiBr that has a concentration of 338 ppm?

9. ## Geometry

Quadrilateral ABCD is a parallelogram. If adjacent angles are congruent, which statement must be true? A. Quadrilateral ABCD is a square. B. Quadrilateral ABCD is a rhombus. C. Quadrilateral ABCD is a rectangle. D. Quadrilateral ABCD is an isosceles

10. ## Math

What do they call the international hula hoop championships?

11. ## English

Which poetic device is used in the sentence "There was an iciness, a sinking, a sickening of the heart"? enjambment metaphor consonance assonance

12. ## Chemistry

Complete the table by filling in the formula for the ionic compound formed by each pair of cations and anions, as shown for the first pair. Ion K+ NH+4 Mg2+ Fe3+ Cl- OH- CO3 2- PO3- 4 Complete the fourth row of the table.

13. ## algebra

Sarah blends coffee for Tasti-Delight. She needs to prepare 170 lbs of blended coffee beans selling for \$3.59 per pound. She plans to do this by blending together a high-quality bean costing \$5.00 per pound and a cheaper bean at \$2.00 per pound. To the

14. ## Chemistry

Consider an ideal gas encloesd in a 1.00 L container at an internal pressure of 10.0 atm. Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 20.0 L. w = ____ J now calculate the work done if this

15. ## Chemistry

Magnesium metal reacts with hydrochloric acid to produce hydrogen gas H2 Mg + 2HCl ----> MgCl + H2 Calculate the volume (in liters) of hydrogen produced at 33 degrees C and 665 mmHg from 0.0840 mol Mg and excess HCl P= .875 atm V= ? n= .0840 mol R= 0.0821

16. ## English

The suffix —ly, as in the word pretentiously, means which of the following? (1 point) Pretentiously is an adjective. Pretentiously is an adverb.

17. ## Math

Erica knits 18 squares on Monday. She knits 7 more squares each day for the rest of the week. How many squares does Erica have on Friday?

18. ## chemistry

Solid zinc and aqueous hydrogen sulfate reacts to produce hydrogen gas and aqueous zinc sulfate Is this the right answer Z(aq)+HS equals H(G) ZS? if not can u please correct me

19. ## Math

There are two integers from 1 through 40 and are chosen by a random number generator. Write the final answer in a/b form. 1.) P(the same number is chosen twice) 2.) P(both numbers are less than 30) 3.) P(one number is even and one number is odd) 4.) P(both

20. ## Chemistry

A 100g sample of ice at 0ºC is added to 150.0 mL of liquid water at 80ºC in a styrofoam cup calorimeter. (The specific heat capacity of water is 1.184 J/g•ºC, the density of water is 1.00 g/mL, and ∆Hºfus = 6.01 kJ/mol) a) Does all of the ice

21. ## Chemistry

A 2.50 L flask was used to collect a 5.65 g sample of propane gas, C3H8. After the sample was collected, the gas pressure was found to be 741 mmHg. What was the temperature of the propane in the flask. P= 741 mmHg(1 atm/760 mmHg)= .975 atm V= 2.50 L n=

22. ## Chemistry

for the reaction of hydrogen with iodine H2(g) + I2(g) --> 2HI(g) relate the rate of disappearance of hydrogen gas to the rate of formation of hydrogen iodide. and my answer is: rate formation of HI= delta [HI]/delta t and the rate of reaction of I2 =

23. ## Science

Helium gas in a balloon occupies 2.5 L at 300.0 K. The balloon is dipped into liquid nitrogen that is at a temperature of 80.0 k. What will the volume of the helium in the balloon at the lower temperature be? I got a weird answer like .66667 and i used

24. ## math/geometry

complete the statements: To find the length of the hypotenuse of a 45-45-90 triangle, multiply the length of one of the legs by:? Could the answer be .5??? to find the length of the shorter leg of a 30-60-90 triangle, multiply the length of the longer leg

25. ## physics

Unpolarized light passes through six successive Polaroid sheets each of whose axis makes a 59 degree angle with the previous one. What is the intensity of the transmitted beam, I/Io?

26. ## Physics

A tennis ball is served from the back line of the court such that it leaves the racket 2.4 m above the ground in a horizontal direction at a speed of 22.3 m/s. (a) will the ball cross a 0.91-m-high net in front of the server? Will the ball land in the

27. ## Chemistry

In an experiment, you fill a heavy walled 5.00 L flask with methane gas, CH4. If the flask contains 7.13g of methane at 19 degrees C, what is the gas pressure. Use the ideal gas law. Can some one help me get started on this problem please

28. ## College Algebra

Cassius drives his boat upstream for 30 minutes. It takes him 15 minutes to return downstream. His speed going upstream is two miles per hour slower than his speed going down stream. Find his upstream and downstream speed.

29. ## chemistry

You are a workstudy for the chemistry department. Your supervisor has just asked you to prepare 500mL of 3M HCl for tomorrow's undergraduate experiment. In the stockroom explorer, you will find a cabinet called "Stock Solutions". Open this cabinet to find

30. ## chemistry

Complete and balance the precipitation reactions. Include physical states in your equations. Ba(NO3)2(aq) + CuSO4 (aq)---> K3PO4(aq)+MgCl2 (aq)---->

31. ## Chemistry

Concentrated aqueous ammonia contains 1.00 mol NH3 dissolved in 2.44 mol H20. What is the mole fraction of NH3 in concentrated aqueous ammonia? What is the molal concentration of NH3

32. ## Chemistry

Classify each of the following by the type of solid if forms: a. LiCl b. BaCl2 c. BCl3 d. CCl4 e. NCl3 I have four different types of solids to guess from like Metallic solid, ionic solid, molecular solid, covalent network solid and i don't know which goes

33. ## chemistry

Gaseous butane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 29.1 g of butane is mixed with 64. g of oxygen. Calculate the minimum mass of butane that could be left over by the chemical reaction. Be sure your

34. ## Chemistry

A bullet weighing 235 grains is moving at a speed of 2.52 X 10^3 ft/s. Calculate the kinetcic energy of the bullet in joules ahd in calories. One grain equals 0.0648 g. Can someone help me out on this please K. E.= 1/2 mv2 . Convert m to kg Convert ft/sec

35. ## Chemistry

Chloroform CHCl3, is a volatile liquid solvent. Caculate the density of cholroform vapor at 98 degrees C and 797 mmHg. Give the answer in grams per liter. How do I start this out

36. ## Chemistry

Predict the order of increasing vapor pressure at a given temperature for the following compounds: CH3CH2CH2CH2OH HOCH2CH2CH2OH CH3CH2OCH2CH3

37. ## Chemistry

What is the de Broglie wavelength of an oxygen molecule, O2 traveling at 521 m/s? Is the wavelength much smaller or much larger than the diameter of an atom. (on the order of 100 pm) De Broglie wavelength = h/mv h = Planck's constant in J*s. m is mass in

38. ## Math

The base of a 6-inch long ice cream cone with a diameter of 2 inches, is cut 0.25 inches from the base. This cut creates two shapes, one is a cone, and the other one resembles a cylinder since it was cut so close to the base. What is the BEST estimate for

39. ## Consumer Math- HELP

1. Fred salmon purchased six 1,000 bonds at 92. The bonds pay 6.5% What was the cost of the bonds? What was the total annual interest? What is the yield (to the nearest percent)? 2. John Tucker is interested in purchasing stock. He wants to determine the

40. ## CHEM

Can you please check my work? I got -4.3KJ/mol If this is not right can you tell me what I am doing wrong? Thank you! Questions. 1.a. Use Hess's Law and the measured mean enthalpy changes for the NaOH-HCl and NH3-HCl reactions to calculate the enthalpy

41. ## Trig

Find the exact circular function value for: sec(23pi/6) I know the answer should be: [2sqrt(3)]/3, but I do not understand how to solve the problem. I have a unit circle, but 23pi/6 is not on it, so I don't know how to find the (x,y)

42. ## mathematiks concepts

A must when introducing each whole number operation is to A. encourage the students to work fast. B. make liberal use of real-life story problems that the students can act out. C. begin with flash card games. D. be sure all students are on the same page in

43. ## Chemistry

Caffeine C8H10N4O2, is a stimulant found in a tea and coffee. A sample of the substance was dissolved in 45.0g of choloroform CHCl3 to give a 0.0946m solution. How many grams of caffine were in the sample. m = molality

44. ## Chemistry

Hydrogen sulfide H2S is produced during decomposition of organic matter. when .5000 mol H2S burns to produce SO2 and H2O. -281.0 kJ of heat is released. what is this heat in kilocalories. Can you help me start this please

45. ## English

Which sentence should be edited to eliminate its cliché? A. The texture of the burlap was a cross between woven straw and a three-day beard. B. The family was immensely relieved when Great-Aunt Martha's condition progressed from "critical" to "it looks

46. ## Chemistry

Nitric Acid is produced from nitric oxide, NO which in turn is prepared from ammonia by the ostwald process. 4NH3 + 5O2 -----> 4NO + 6H2O What volume of oxygen at 35 degrees C and 2.15 atm is neeeded to produce 50.0 g of nitric oxide T= 273+35 = 308 K P =

47. ## Chem = )

Write the complete ionic equation for BaCl2 + NaOH ----> Al2(SO4)3 + BaCl2 ---> Al2(SO4)3 + NaOH ---> NaOH + Zn(No3)2 ---> BaCl2 + NaI --->

48. ## Texas State History

What is the purpose of the NAFTA treaty?

49. ## Physics

The distance between two consecutive nodes of a standing wave is 19.2 cm. The hand generating the pulses moves up and down through a complete cycle 2.59 times every 7.44 s. Find the velocity of the wave. Answer in units of m/s.

50. ## statistics

An important indicator of lung function is forced expiratory volume(FEV), which is the volume of air that a person can expire in one second. Dr. Jones plans to measure FEv in a random sample of n young women from a certain population, and to use the sample

51. ## Chemistry

carbon dioxide (CO2) is the gas mainly responsible for global warming (the greenhouse effect). the burning of fossil fuels is a major cause of the increased concentration of CO2 in the atmosphere. carbon dioxide is also the end product of metabolism. a

52. ## Chemistry

If 456 dm^3 of krypton at 101 kPa and 21 degrees C is compressed into a 27.0 dm^3 tank at the same temperature, what is the pressure of krypton in the tank? V1= 456 dm^3 V2= 27.0 dm^3 P1= 101 kPa P2= ? P2= 101 kPa * 456 dm^3/ 27.0 dm^3 ANSWER: 1705.78 kPa

53. ## Physics

A 2.50 mass is pushed against a horizontal spring of force constant 26.0 on a frictionless air table. The spring is attached to the tabletop, and the mass is not attached to the spring in any way. When the spring has been compressed enough to store 15.0 of

54. ## Chemistry

According to your calculations a reaction should yield 5.67 g of oxygen O2. What do you expect the volume to be at 23 degrees C and 0.985 atm? I got the all the amounts 5.67 g 23 degrees C = 296 K .985 atm And use the ideal gas law Can you help me out by

55. ## math

Which statement is ALWAYS true? A) The sine of an angle is equal to the sine of the angle's complement. B) The cosine of an angle is equal to the sine of the angle's supplement. C) The sine of an angle is equal to the cosine of the angle's complement. D)

56. ## Chemistry

how do you write a chemical equation with this reaction? can u help me solve these 1.Liquid carbon disulfide reacts with oxygen gas, producing carbon dioxide gas and sulfur dioxdie gas. 2. Solid zinc and aqueous hydrogen sulfate reacts to produce hydrogen

57. ## sci

Suppose you are in charge of planning a forest reserve, and one of your main goals is to help sustain locally beleaguered populations of woodland birds. Parasitism by the brown-headed cowbird is an escalating problem in the area. Reading research reports,

58. ## Math

Find the point, M, that divides segment AB into a ratio of 4:7 if A is at (-33, 0) and B is at (0, 44). A)(-22, 15) B) (-22, 16) C) (-21, 15) D) (-21, 16) Is it A?

59. ## Chemistry

How many mL of 3.00M HNO3 would you need to make exactly 100mL of 0.83 HNO3 by dilution with water? (The FM of HNO3 = 63.0.)

60. ## Physics

A model electric train requires 6 V to operate. If the primary coil of its transformer has 240 windings, how many windings should the secondary have if the primary is connected to a 120 V household circuit?

61. ## physics

A 1.20 kg mass on a horizontal spring oscillates on a frictionless surface with a displacement as a function of time given by x(t) = 0.075cos(4.16t – 2.45). (Units are standard units.) a.) Find the time for one complete vibration. b.) Find the force

62. ## Physics

A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 85.0 kg, and the hill is inclined at 19.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs

63. ## Math

A rancher is putting a fence around a square animal pen. The perimeter of the pen is 32 feet. The fence posts will be 16 inches apart. She starts by putting 1 fence post at each corner of the pen. How many fence posts does she use altogether? My solution

64. ## Math

A cone-shaped pile of sawdust has a base diameter of 40 feet, and is 15 feet tall. Find the volume of the sawdust pile. Round your answer to the nearest hundredth if necessary. Use 3.14

65. ## Chemsitry

Use these data to estimate Avogadro's number. Palladium crystallizes with a face-centered cubic structure. It has a density of 12.0g/cm^3 , a radius of 138 pm , and a molar mass of 106.42 g/mol .

66. ## Physics

A meter stick whose mass is 0.200 kg is supported at the zero cm mark by a knife edge and a force F at the 100 cm point. A mass of 700 grams is attached to the stick at 40 cm mark. Find the magnitude of N and F in Newton's.

67. ## Chemistry

The solubility of KNO3 is 80g/100g water at 50 degrees and 10g/100g water at 0 degrees. The solubility of CuSO4 is 60g/100g water at 50 degrees and 20g/100g water at 0 degrees. A mixture contains 13.8g of KNO3 and 1.94g of CuSO4. A) Calculate the minimum

68. ## Chemistry

I have two questions: 1. A sample of 10.7 g of CO reacts completely with O2 to form CO2. How many grams of CO2 will be formed? 2. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2 g of ammonia are reacted with

69. ## Chemistry

When 23.6 of calcium chloirde CaCl2 was dissolved in water in a calorimeter, the temperature rose from 25.0 degrees C to 21.56 degrees C. If the heat capacity of the solution and the calorimeter is 1071 J/ degrees C, what is the enthalpy change when 1 mol

70. ## pe 8

1. Which side of the health triangle corresponds to getting enough rest? a) physical health b) social health c) mental and emotional health*** d) none of the above Am I right?

The power, P, dissipated when a 6-volt battery is put across a resistance of R ohms is given by P=36R. What is the rate of change of power with respect to resistance?

72. ## algebra

a water rocket is launched with an initial velocity of 112ft/sec. its height h, in feet T seconds is given by the formula h=112T-16T^2. when will the rocket be exactly 192 ft above the ground? the rocket first reaches a height of 192ft after _____ and

73. ## Chemisty

A solution contains 0.0653g of compound in 8.31g of ethanol. The molarity of the solution is 0.0368m. Calculate the molecular weight of the compound

74. ## spanish

what would the possesive pronoun be? Se me quedaron en casa los libros. ¿Trajo Ana ____ (hers)? Uso mi teléfono celular cuando viajo. ¿Cuándo usa Ramón _____ (his)? Tu profesora es muy simpática. _____ (Ours) es simpática también. Me encantan mis

75. ## Calculus

I am supposed to find when there will be 40 berry bushes. I am given the function p(t)=(16t+50t^3)^1/3. P is the population of a certain type of bush in a conservation area and t is time in years. I know that i am supposed to make p(t) = 40, but i don't

76. ## physics

Atwood's Machine An Atwood's machine consists of two masses, and , connected by a string that passes over a pulley. If the pulley is a disk of radius and mass , find the acceleration of the masses.

77. ## chemistry

How do carboxylic acids and esters differ in chemical structure? Check all that may apply. Esters have a hydroxyl group. Esters have a carboxyl group. Esters have a carboxyl group and hydrogen linkage off the alpha carbon. Esters have a carboxyl group and

78. ## Chemistry

If you had excess chlorine, how many moles of of aluminum chloride could be produced from 20.0 g of aluminum? If you had excess aluminum, how many moles of aluminum chloride could be produced from 25.0 g of chlorine gas Cl2?

79. ## Chemistry

Hydrogen sulfide, H2S is a foul smelling gas. It burns to form sulfur dioxide. 2H2S +3O2 ----> 2N2 +6H2O Delta H=-1036kJ Calculate the enthalpy change to burn 26.7 g of hydrogen sulfide.

80. ## Chemistry

N2(g) + 3H2(g)  2NH3(g) at STP How many litres of ammonia gas is produced using 5 litres of H2? N2 + 3H2 ---> 2NH3 - the ratio between H2 and NH3 is 3 : 2 - it's given 5 litres of H2, so the volume of NH3 formed is 5/3*2 = 10/3 = 3.33 (L) Sig FIG ANSWER

81. ## Chemistry

2 C8H18(g) + 25 O2(g)  16 CO2(g) + 18 H2O­(g) at STP How many moles of O2 are needed to react with 60.0g of C8H18 (octane)? mole of 02 = 60/114 = 53 mols 2 moles of octane =25 mols of 02 0.53/2 x 25= 6.625 answer is 6.6 mols How many litres of CO2 are

82. ## math

one estimate for the ideal body weight of a woman is shown below. use this information to answer part (a) through (d) 55kg+1.5kg for each inch over 5 feet (a) find a linear model for an estimate of the ideal weight of a woman using W for ideal body weight

83. ## Chemistry

Iodide Ion is oxidized to hypoiodite ion IO- by hypochlorite ion ClO- in basic solution. The equation is I- + ClO- --- IO- + Cl- Initial concentraition I- ClO- OH- exp 1. 0.010 0.020 0.010 exp 2. 0.020 0.010 0.010 exp 3. 0.010 0.010 0.010 exp 4. 0.010

84. ## Math

Erin designs a trophy stand using one-inch cubes. The stand is shaped like a rectangular prism. How many different stands can Erin design using exactly 12 one-inch cubes? A) 8 B) 3 C) 5 D) 2 My work is 4*3*1, 12*1*1, 6*2*1, 2*2*3 Erin can make 4 different

85. ## English

In the following sentence, which word is used as a conjunction? Lisa and Mary were home on time, but Kim, Francine, and Penny weren't going to make it. A. On B. But C. Were D. And my answer is b.

86. ## Art

Ketchup is a non-traditional material, but the artist used it in his protest piece against fast food restaurants because of its ability to A-resist decay B-convey a message C-deteriorate quickly D-attract flies

87. ## Chemistry

A solution is made by mixing 30.0 mL of ethanol, C2H6O, and 70.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C? I got an answer of 15.45 torr and it marked me incorrect and said "Your answer is the the partial

88. ## Chemistry

I need help putting my answers in significant figures thanks 2 C8H18(g) + 25 O2(g)  16 CO2(g) + 18 H2O­(g) at STP How many moles of O2 are needed to react with 60.0g of C8H18 (octane)? mole of 02 = 60/114 = 53 mols 2 moles of octane =25 mols of 02

89. ## English

Choosing a good reviewer for your writing means finding someone who A. is a close friend and will give you a positive review. B. concentrates on correcting your spelling and grammar errors. C. will concentrate on your ideas and how well you support them.

90. ## Organic Chemistry

Draw every stereoisomer for 1-bromo-2-chloro-1,2-difluorocyclopentane. Use wedge-and-dash bonds for the substituent groups, and be sure that they are drawn on the outside of the ring, adjacent to each other.

91. ## Global Studies

Although fish is the Atlantic provinces' most abundant natural resource, what caused cod fishing to be banned throughout Canada in 2003? a. A disease killed all the cod b. People stopped eating cod c. Gas-powdered fishing boats were outlawed first d.

92. ## Math

Which binomial is a factor of f(x) = x^4 27x^2 14x + 120? (x 4) (x 2) (x + 5) (x + 6)

93. ## physics

A beam of microwaves with wavelength= 1 mm is incident upon a 9 cm slit. At a distance of 2 m from the slit, what is the approximate width of the slit's image?

94. ## English 7: Wk Sht - Perseverance

I have to answer these 4 questions and in those question they ask me and I have to say if I agree or disagree. I just need help on like what do they mean. 1. You need a positive attitude tp persevere in difficult situations? I agree or disagree because:

95. ## Algebra 1

Earth has a radius of about 6.4 x 10 to the 6th power m. Approximate the surface area of earth using the formula for the surface area is a sphere, S = 4 pi r squared. Earths surface is about 70 percent water. About how many square meters of earths surface

96. ## english

Which of the following statements BEST explains why "I Am Offering This Poem" is considered a lyric poem? A. It is a simple poem that tells a story. B. It is a tragic poem that teaches a lesson. C. It is a short poem that expresses strong emotion. D. It is

97. ## chemistry

Fe2+(aq) + Cr2O7 2- (aq) →Fe3+(aq) + Cr3+(aq) Balance the equation by using oxidation and reduction half reactions. What is smallest possible integer coeﬃcient of Cr3+ in the combined balanced equation?

98. ## Chemistry

A quantity of ice at 0.0 degrees C was added to 33.6 of water at 21.0 degree C to give water at 0.0 degrees C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(g * degrees C) q = mass x specific heat x