# Veronica

Popular questions and responses by Veronica
1. ## 8th grade English/Language Arts

1.)Why does the author of “Always to Remember” discuss Maya Ying Lin’s background? a.)to show that she experienced hardships b.)to appeal to Chinese-American readers c.)to show its influence on her design d.)to show her disinterest in architecture

2. ## Chemistry

Determine the concentration of CO32- ions in a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

3. ## Chemistry

What is the mass percent of an aqueous sodium hydroxide solution in which the molality of NaOH is 6.25m? The density of the solution is 1.2219 g/mL

4. ## Math

Every year in Delaware there is a contest where people create cannons and catapults designed to launch pumpkins as far in the air as possible. the equation y=15+110x-16x^2 can be used to represent the height, y, of a launched pumpkin, where x is the time

5. ## Math

Given the altitude of lakes in feet: –12, –9, –14, –39, –49, –49, –18, –43, find the mean, median, mode, and range

6. ## scince

as you drive down the highway you may see crows feeding on dead animals. as a result of this nutritional pattern,crows may be classified as

7. ## Chemistry

How many moles of KF are contained in 244 mL of 0.135 m KF solution? The density of the solution is 1.22 g/mL.

8. ## Physics

You are trying to overhear a juicy conversation, but from your distance of 15.0m, it sounds like only an average whisper of 25.0 dB. So you decide to move closer to give the conversation a sound level of 70.0 dB instead.How close should you come.

9. ## math

At a given time, Saturn was 9.1 x 10 to the 8th miles from the sun and the earth was 9.3 x 10 to the 7th miles from the sun. by what distance is one planet closer to the sun than the other planets?

10. ## math

an aquarium holds 6 1/4 gallons of water. the water level has dropped to 4/5 of this amount. how much water should be filled?

11. ## Trigonometry

Having trouble with true/false questions in Trigonometry. They read as follows - True or False: For a trigonometric function, y=f(x), then x=F^-1(y). Explain your answer. True or False: For a one to one function, y=f(x), then x=f^-1(y). Explain your

12. ## Chemistry

A sulfuric acid solution that is 65.0% H2SO4 by mass has a density of 1.55 g/mL at 20°C. What is the mass of h2so4 per liter of solution?

13. ## Chemistry

The potassium salt of benzoic acid, potassium benzoate, KC7H5O2, can be made by the action of potassium permanganate on toluene, C7H8. C7H8 + 2 KMnO4 --> 2MnO2 + KOH + H2O If the yield of potassium benzoate cannot be realistically be expected to be more

14. ## Chemistry

2Al(s)+3Cl2 = 2AlCl3 Limiting Reactant is Cl with 0.329mol. What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine?

15. ## Physics

You have landed on an unknown planet, Newtonia, and want to know what objects will weigh there. You find that when a certain tool is pushed on a frictionless horizontal surface by a 12.2 N force, it moves 16.3 m in the first 2.30 s, starting from rest. You

16. ## Physics

A 56kg student runs at 5m/s, grabs a hanging rope and swings out over a lake. He releases the rope when his velocity is zero. The length of the rope is 10m, what is the angle when he releases the rope? (The person swings from the centre to the right).

17. ## Chemistry

Strontium metal is responsible for the red color in fireworks. Fireworks manufacturers use strontium carbonate, which can be produced by combining strontium metal, graphite (C), and oxygen gas. The formation of one mole of SrCO3 releases 1.220 x 103 kJ of

18. ## chemistry

what is the solubility of potassium nitrate (KNO3) in 100.0g of water at 80.0 degrees celcius?

19. ## Chemistry

How much 5 M KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0? The amino group of glycine has a pKa of 9.6.

20. ## chemistry

calculate the work done when 50.0g of tin dissolves in excess acid at 1.00 atm and 25 degrees c.

21. ## science

A box weighing 180 newtons is hanging by rope as shown in the figure. Find the tension T¿.

22. ## Calculus (Urgent Help)

Okay, I need major help! Can someone tell me if these statements are true or false ASAP please. Thank you. 1. If ƒ′(x) < 0 when x < c then ƒ(x) is decreasing when x < c. True 2. The function ƒ(x) = x^3 – 3x + 2 is increasing on the interval -1 < x <

23. ## Chemistry

Manganese trifluoride, MnF3,can be prepared by the following reaction. 2 MnI2 (s) + 13 F2 (g) ---> 2 MnF3(s) + 4 IF5(l) What is the minimum number of grams of F2 that must be used to react with 12.0 g of MnI2 if the overall yield of MnF3 is no more than

24. ## Chemistry

A 0.500L vessel initially contains 0.0125 mol of H2S2 . Find the equilibrium concentrations of H2 and S2. Kc = 1.67 x 10^-7 2 H2S 2 H2 + S2

25. ## Chemistry

Iron (III) Nitrate reacts with sodium carbonate to form a precipitate. Be sure to indicate oxidation states and the precipitate. Skeletal Equation: Ionic Equation: NET Ionic Equation: Balanced Equation: Spectator Ions: I got the skeletal equation, but I

26. ## Trigonometry

Having trouble with true/false questions in Trigonometry. They read as follows - True or False: For a trigonometric function, y=f(x), then x=F^-1(y). Explain your answer. True or False: For a one to one function, y=f(x), then x=f^-1(y). Explain your

27. ## Chemistry

What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M CH3CO2H with 25.00 mL of 0.030 M CH3CO2Na? Assume that the volume of the solutions are additive and that a = 1.8 × 10-5 for CH3CO2H.

28. ## Chemistry

What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine

29. ## Physics

A 56kg student runs at 5m/s, grabs a hanging rope, swings out over a lake. He releases the rope when his velocity is zero. The angl when he releases the rope is 29.25degrees. What is the tension in the rope just before he releases it? What is the maximum

30. ## math

A flagpole casts a 32-ft shadow. A boy who is 6 feet tall is standing near the flagpole casting a 16-ft shadow. They form similar triangles. How tall is the flagpole?

31. ## Science

A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. What is the horizontal velocity component of the ball to the nearest tenth of a m/s?

32. ## Chemistry

Which of the following compounds has an atom with an unfilled valence shell of electrons? A) H3O+ B) BF3 C) CH3OH D) NaI

33. ## Statistics

In one study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among the smokers who

34. ## algebra

Translate the phase into an algebraic expression 8 more than twice Chau's age

35. ## Chemistry

I posted this question before and the answer is suppose to be 6.8 L but I keep getting 6.12 L dinitrogen pentoxide n2o5 decomposes by a first-order decomposition in chloroform solvent to yield NO2 and O2. The rate constant at 45°C is 6.2 x 10^-4 mins^-1.

36. ## Chemistry

How many grams of potassium nitrate, KNO3 are required to make 250 mL solution with a molarity of 0.40 M?

37. ## Science

Why are aboriginal clan systems considered human social systems?

38. ## Chemistry

I posted this last night, A 0.500L vessel initially contains 0.0125 mol of H2S2 . Find the equilibrium concentrations of H2 and S2. Kc = 1.67 x 10^-7 2 H2S 2 H2 + S2 I have come up with this equation so far, but I am lost now because I don’t even know if

39. ## Chemistry

If you take a 10.0-{mL} portion of the stock solution and dilute it to a total volume of 0.700 L, what will be the concentration of the final solution?

40. ## Maths ... help

Paloma has 3 jackets, 6 scarves, and 4 hats. Determine the number of different outfits consisting of a jacket, a scarf, and a hat Paloma can wear.

41. ## algebra

a bag contains 4 red chips, 2 blue chips and 5 green chips. A chip is randomly removed from the bag, and then without replacing the first chip, a second chip is removed. What is the probability that both of the chips selected from the bag were blue?

42. ## Trigonometry

How do you express sin4x as a trigonometric function of x?

43. ## Chemistry

dinitrogen pentoxide n2o5 decomposes by a first-order decomposition in chloroform solvent to yield NO2 and O2. The rate constant at 45°C is 6.2 x 10^-4 mins^-1. Calculate the volume of O2 obtained from the reaction of 1.00 mol N2O5 at 45°C and 770 mmHg

44. ## Chemistry

dinitrogen pentoxide n2o5 decomposes by a first-order decomposition in chloroform solvent to yield NO2 and O2. The rate constant at 45°C is 6.2 x 10^-4 mins^-1. Calculate the volume of O2 obtained from the reaction of 1.00 mol N2O5 at 45°C and 770 mmHg

45. ## Calculus

Suppose that a car can accelerate from 30 mph to 50 mph in 4 seconds. Assuming a constant acceleration, find the acceleration (in miles per second squared) of the car and find the distance traveled by the car during the 4 seconds.

46. ## Riddle

There is one pond in which one lotus gets doubled everyday. In 20 days pond is half filled. so how many days it will take to get full completely? Thx the answer is 21?? yes. Double of half-full is full.

47. ## earth science

how are well-developed soils similar to young soils? how are they different?

48. ## Chemistry

How much 5 M KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0? The amino group of glycine has a pKa of 9.6.

49. ## History

What is the significance of the stupas and monasteries Asoka caused to be built throughout India? A. They were protested by many Hindus. B. They were public works that brought jobs to many. C. They honored ancestors that brought joy to Indians. D. They

50. ## Physics

During each heart beat, approximately 70cubic cm of blood is from the heart at an average pressure of 105mmHg. Calculate the power output of the heart, in watts, assuming 70 beats per minute.

51. ## chemistry

How would you prepare 500mL of 6.0M NaOH solution using solid NaOH pallets?

52. ## math

prove: 2sinx+sin2x = 2sin^3(x)/1-cosx

53. ## English

Does the following mean that the job is done on August 30, 2019? "Schedule: 30 hours per week, flexible, Monday through Friday, 8:30am to 5:00pm (through August 30, 2019)" Thanks!

54. ## algebra

Janet invested \$23,000, part at 6% and part at 17%. If the total interest at the end of the year is \$2,260, how much did she invest at 6%? Let x be the amount invested at 6% Then 23,000 - x is invested at 17%. 0.06 x + 0.17 (23,000 - x) = 2260. That

55. ## Physics

A Carnot engine uses a steam boiler at 100°C as the high-temperature reservoir. The low-temperature reservoir is the outside environment at 16.5°C. Energy is exhausted to the low-temperature reservoir at a rate of 185 W. (c) How much steam will it cause

56. ## MATH

A HUMMINGBIRD BEATS IT WINGS 53X SEC HOW MANY TIMES DOES THE HUMMINGBIRD BEATS IN 5 SEC

57. ## English

Can I use the term "out of town" to indicate that I am traveling to a different country?

58. ## Chemisty

A 0.411 g sample of powdered copper mixed with an inert, soluble additive was fully consumed by 23.4mL of 0.602M nitric acid, producing copper (II) nitrate, water, and nitric oxide. What is the percent copper by mass in the sample? 3Cu + 8HNO3 = 3Cu(NO3)2

59. ## science

a consumer-producer relationship is best illustrated

60. ## Chemistry

will acidic foods cooked in a cast iron skillet become Fe+2 enriched because of a reaction beteen the acidic food and the skillet?

61. ## PHYSICS

The velocity of a diver just before hitting the water is -8.7 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 0.89 s of the dive?

62. ## statisitcs

The combined math and verbal scores for students taking a national standardized examination for college admission is normally distributed with a mean of 560 and a standard deviation of 180. If a college requires a student to be in the top 40 % of students

64. ## English

What does the following statement mean? "Late fee becomes due when rent is not received by the end of the 4th day of the rental period." Does this mean that, for example, if the monthly rental period is from September 1 to September 30, the late fee is due

65. ## physics

A cannonball is shot from a cannon on a cliff at a height of 18.9 m at a ship on the ocean. The cannonball is shot with an initial velocity of 15.1 m/s at an angle of 24.7 degrees above the horizontal. #1- What is the total maximum height of the cannonball

66. ## AP Physics

A car traveling 92 km/h is 130 m behind a truck traveling 75 km/h. How long will it take the car to reach the truck?

67. ## physics

driving on a hot day causes tire pressure to rise. what is the pressure inside an automobile tire at 288, if the tire has a pressure of 30 psi at 318k? Assume that the volume and amount of air in the tire remain constant

68. ## History

what kind of social structure did the Huang he have? I cant find anything on the internet to help me dose anyone have an answer or an article I can read?

69. ## math

How did the angle lose his job?

what is an function

71. ## maths,science,geography and life science

What is restorative justice intention in process of human rights?

72. ## Chemistry

At 20°C, an aqueous solution that is 18.0% by mass in ammonium chloride has a density of 1.0512 g/mL What is the molarity of ammonium chloride in the solution?

73. ## chemistry

What is the molarity of a 200. mL solution in which 0.20 mole of sodium bromide is dissolved?

74. ## Chemistry

Based on the chemical reaction: N2(g) + 3H2(g) → 2NH3(g), which substance takes up the most space? a) 2NH3(g) b) 3H2(g) c) All of the substances have the same volume d) N2(g)

75. ## math

a factory produces 6 motorcycles in 9 hours write a proportion and solve it to find how many hours it takes to produce 16 motorcycles. help me please!

76. ## Chemistry

Consider the following equilibrium. 2 SO2 (g) + O2 (g) 2 SO3 (g) The equilibrium cannot be established when __________ is/are placed in a 1.0-L container.

77. ## Chemistry

Calcium carbonate, CaCO3(s), decomposes upon heating to give CaO(s) and CO2(g). A sample of CaCO3 is decomposed, and carbon dioxide is collected in a 250 mL ﬂask. After decomposition is complete, the gas has a pressure of 1.3 atm at a temperature of

1 )3x + 8y = 1 7x + 4y = 17 Answer: (3,1) 2) -3x + 5y = -7 9x + 2y = 38 Answer: (4,1) 3) 7r + 3s = 13 14r - 15s = -16 Answer: (1,2) 4) 2x - 7y = 42 4x - 14y = 64 Answer: No Solution ?? 5) 9x + 12y = 15 3x + 4y = 5 Answer: Identity ?? 6) 2 = 4s - 3t 2 = 12s

79. ## calculus

radioactive Carbon 14 in a dead organism decays according to the equation A=A e^.000124t where t is in years and A0 is the amount at t=0. Estimate the age of a skull uncovered in an archeological site if 10% of the original Carbon 14 is still present.

80. ## chemistry

To what volume should 100ml of any weak acid (HA) with a concentration of 0.2M be diluted to double the percentage ionization?

81. ## Chemistry

Objectives To determine the molecular weight of a volatile liquid. Discussion [This laboratory exercise was adapted from one in Beran and Brady's Laboratory Manual for General Chemistry , John Wiley & Sons, 1982] The Dumas Method for determining the

82. ## Chemistry

How many moles of HNO3 are present in 35.0 mL of a 2.60 M solution of nitric acid?

83. ## Physics

A plutonium- 239 nucleus initially at rest undergoes alpha decay to produce a uranium-235 nucleus. The uranium-235 nucleus has a mass of 3.90 x 10^-25 kg and moves away with a speed of 2.62 x 10^5 m/s. Determine the minimum wage electric potential

84. ## Chemistry

The of hydroxylamine, , is . A buffer solution is prepared by mixing 120 of a 0.34 hydroxylamine solution with 60 of a 0.25 solution.Solve for the PH

85. ## Algebra

A high school has 900 students, 40% of whom are drama majors. A second high school has a 75% drama majors population. The school board plans to merge the two schools into a Performing Arts magnet school that will then have a 52.5% drama majors student

86. ## Chemistry

If 150 mg of aspirin are rinsed with three portions of 10 mL of water at 25 degrees Celsius, how much aspirin is recovered? Solubility of aspirin in water at 25 degrees Celsius is one gram of aspirin per 300 mL of water.

87. ## Math

A swing has a maximum height of 2 m and a minimum height of 0.5 m and it takes 3 seconds to get from the maximum height to the minimum height. Approximate the instantaneous rate of change 1 second into the fall using the difference quotient when h is 0.01.

88. ## statistics

Suppose a random sample of 80 measurements is selected from a population with a mean of 65 and a variance of 300. Select the pair that is the mean and standard error of x.

89. ## Chemistry

What are the independent and dependent variables when determining the percentage water in hydrated copper sulfate salts, while designing the experiment? The question states 'Select sensible amounts to make the independent variable the limiting reagent and

90. ## simple intrest

My daughter brought home a work sheet and I have no clue where to begin to help her and she seems to have no clue either. the questions are 1. Find the final balance in each account. \$800 at 4.25% simple intrest for 6 years 2. \$2,000 at 6% compounded

91. ## Physics HELP!

a rock is thrown vertically upwards with an initial velocity of 30 m/s. Neglecting air resistance, calculate a) the maximum height reached b) the time taken to reach maximum height PLEASE help with this

92. ## Chemistry

(Use the information in the table below. Show the half reactions and the potentials for each half reaction.) Determine whether the following redox reaction is spontaneous as written. 2Al(s) + 3Zn2+(aq) → 2Al3+(aq) + 3Zn(s) Reduction Potentials at 25°C

93. ## chemistry

A hot metal cylinder is placed in water at room temperature in a closed system. Which statement is NOT true concerning heat flow? a) The metal exhibits an endothermic change. b) The final temperature of the metal and the water will be the same. c) Water

94. ## Informal logic

Catherine goes to her local movie theater only to see romantic comedies. Since Catherine did not go to the movies yesterday, there is not a romantic comedy playing at her local theater. The reasoning above is flawed because the evidence does not suggest

95. ## Chemistry

100g of a saturated solution of sodium nitrate at 43°C is cooled quickly with stirring to 10°C. How many grams of the solute will crystallize?

96. ## chemistry

The following reaction: SO2 (g) SO3 (g) + NO (g) having reached a state of equilibrium, was found to contain 0.40 M SO3, 0.30 M NO, 0.15 M NO2, and 0.20 M SO2. Calculate the equilibrium constant for this reaction. Describe the direction ad extent of a

97. ## chemistry

Show how to calculate the pH of pure water or a neutral solution.

98. ## algebra 1

The perimeter of a triangle is 62 cm. If the second side is twice as long as the first side, and the third side is 12 cm longer than the second side, what is the length of the longest side of the triangle?

99. ## Trigonometry

Okay, Assume the triangle has the given measurements. Solve for the remaining sides and angles. A = pi/6; a = 17.4; b = 19.6