Chloé

Popular questions and responses by Chloé
1. Chemistry

A gas diffuses twice as fast as CF4 (g). The molecular mass of the gas is: I'm not sure how to figure this out without the rates of diffusion.

2. Alg 2

The value of y varies directly with x. If y = 64 when x is 16, what is x when y is 288?

3. One more thing!

Day had broken cold and gray, exceedingly cold and gray, when the man turned aside from the main Yukon trail and climbed the high earth-bank, where a dim and little traveled trail led eastward through the fat spruce timberland. It was a steep bank, and he

4. Physics

An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave mirror having a radius of curvature of 22.0 cm. (a) Draw a principle-ray diagram showing the formation of the image. (b) Calculate the position, size, orientation (erect or

5. Physics

In order to determine the coefficients of friction between rubber and various surfaces, a student uses a rubber eraser and an incline. In one experiment, the eraser begins to slip down the incline when the angle of inclination is 36.4° and then moves down

6. Chemistry

If a hydrate of the formula MCl * xH2O decomposes when heated to produce HCL, what change would you expect to occur when a piece of litmus paper is held in the path of the vapor released?

7. History

Why was Vietnam key to the US curbing communism in Asia? a. None of these answers. b. Vietnam and the US had strong economic ties. c. Vietnam was a major supplier of rice to the United States. d. Vietnam had a direct tie to Japan which the US had thus far

8. Algebra

If the roots of a quadratic equation are -2 and 3, the equation can be written as a.(x+2)(x+3)=0 b.(x-2)(x+3)=0 c.(x+2)(x-3)=0 d.(x-2)(x-3)=0

9. Physics

A speedboat, starting from rest, moves along a straight line away from the dock. The boat has a constant acceleration of +3.00 m/s2. A siren on the dock is producing a 755 Hz tone. Assuming that the air temperature is 20.0oC, what is the frequency of the

10. Psychology

Which one of the following statements about the gate-control theory is true? Pain impulses create a gate leading to the brain. The brain is capable of generating pain on its own. The gate closes when pain messages go to the brain. Damage to small nerve

11. Algebra

16. The equation models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched and then released. h= 7 cos (π/3 t) a. Solve the equation for t. (I'm pretty sure i've got this one solved) T= 3

12. Math ~ Check Answers ~

1. There are 35 marbles in a bag: 9 blue marbles, 8 green marbles, 4 red marbles, 8 white marbles, and 6 yellow marbles. Find P (red). Write the probability as a fraction in simplest form, a decimal, and a percent. a.) 4/31, 0.129, 12.9% b.) 4/35, 0.114,

13. Science

5. The following balanced equations represent double replacement reactions that each result in the formation of a precipitate. For each reaction, which ratio of reactants would result in the formation of the greatest amount of precipitate? I found the

14. physics

Find the magnitude and direction of the net electrostatic force exerted on the point charge q3 in the figure below, where q = +2.5 μC and d = 28 cm. The picture is of a square. q1=+q, q2=-2q, q3=-3q, q4=-4

15. Math

How is the degree of a polynomial related to the concept of complex numbers? can someone help me with this Its hard for me to understand

16. Physics

The water in a river flows uniformly at a constant speed of 2.53 m/s between parallel banks 69.8 m apart. You are to deliver a package directly across the river, but you can swim only at 1.74 m/s. (a) If you choose to minimize the time you spend in the

17. Algebra

Shirts with the a school's mascot were printed, and the table shows the number of people who bought them the first, second, third, and fourth weeks after their release. Which graph could represent the data shown in the table? Weeks | Number of sales 1 |22

18. Precal

How do i prove that left side equals right? Cot(A+B)=cotAcotB-1/(cotA + cotB)

19. maths

There are 28 in our class. One day there were 6 times as many present as there were absent. How many were present? How many were absent?

20. Maths

In the spring, 80% of the sheep in a flock of sheep had lambs. of those sheep with lambs, 30% had one lamb, 40% had two lambs and the rest had 3 lambs. a total of 240 lambs were born. how many sheep are in the flock? you must show your working.

21. Physics

A charge q =+ 4.11 x 10 - 9 C is placed at the origin, and a second charge equal to -2q is placed on the x axis at the location x = +1.00 m. (a) Find the electric potential midway between the two charges. (b) The electric potential vanishes at some point

22. chemistry

suppose that a large volume of 3% hydrogen peroxide decomposes to produce 12mL of oxygen gas in 100 s at 298 K. Estimate how much oxygen gas would be produced by and identical solution in 100s at 308 K hi can you please help me set up this problem, then I

23. Health

nutrition is the process of the body using foods that we eat in order to sustain life true or false

24. British Literature

Please check my answers #11: Coffeehouses were centers for (A) literary activity (B) political debates © entertainment (D) all of the above. #11: D #12: After viewing the London Fire on September 2, 1666, Samuel Pepys (A) mailed a letter to his father (B)

25. History

How did secularism influence European writers during the Renaissance?

26. math help asap

1.which of the following is a radius of the circle a.DE b.AB C.CE 2.which of the following is a diameter of the circle a.ED b.EC c.BA 3.which of the following is a chord, but not a diameter, of the circle a.CE b.FD c.DE 4.what is the correct way to name a

27. Math

Coram is at basketball practice preparing to shoot free throws. The probability of Coram making a free throw is 77%. What is the probability that he makes his first free throw on the second shot? A. 79% B. 95% C. 88% D. 83% I think the answer is C

28. Civics

Davis in executive at a large company. He is concerned that other businesses in his industry have been moving some of their operations to foreign countries in order to cut down on labor costs. The CEO has asked David to make a recommendation on what the

Suppose your​ friend's parents invest $20,000 in an account paying 5% compounded annually. What will the balance be after 66 ​years? asked on February 10, 2017 30. Math What is the 9th multiple of 100 asked on September 29, 2016 31. honors algebra 1 3. Which ordered pair is a solution of the equation y=x-4? a. (2,6) b. (6,2) c. (-2,6) d. (3,1) 4. Which ordered pair is a solution of the equation y=5x? a. (-2,10) b. (-5, 25) c. (-3,15) d. (-2, -10) 5. Which ordered pair is a solution of the equation asked on September 22, 2016 32. Math, all correct? Write the fraction as a percent. If necessary, round to the nearest tenth of a percent. 6/15 a. 40.0% *** b. 37.5% c. 33.3% d. 46.7% Write the fraction as a percent. If necessary, round to the nearest tenth of a percent. 6 4/5 a. 68% b. 6.8% c. 6.4% Write asked on February 3, 2016 33. physics You drop a rock from rest out of a window on the top floor of a building, 50.0 m above the ground. When the rock has fallen 3.80 m, your friend throws a second rock straight down from the same window. You notice that both rocks reach the ground at the asked on September 17, 2014 34. Chemistry Given the equilibrium reaction N2(g) + 3 H2(g) 2NH3(g) + heat, an increase in temperature will: a) Increase the value of K b) Decrease the value of K c) Increase or decrease the value of K depending upon the concentration of reactants d) Will have no asked on April 20, 2014 35. English In the following sentence identify the appositive or appositive phrase and the noun or pronoun defined by the appositive. Mr. Murray, the Scoutmaster, likes to hike. Appositive? Noun or pronoun defined? asked on October 1, 2013 36. chemistry Given that for the vaporization of benzene Hvap= 30.7 kj/mol and Svap= 87.0 J(K * mol) , calculate Delta G (in kJ/mol) for the vaporization of benzene at 13 Celcius. asked on April 29, 2013 37. English In the story The Necklace written by Guy de Maupassant what are the examples of similes and metaphors? asked on September 18, 2012 38. Chemistry If 150.0 grams of iron at 95.0 degrees Celcius, is placed in an insulated container containing 500.0 grams of water at 25.0 degrees Celcius, and both are allowed to come to the same temperature, what will that temperature be? The specific heat of water is asked on February 22, 2012 39. chemistry ASAP name the following: H2SeO3 H2TeO2 PO3^3- HCLO4 Please explain how to find the names !!!!! asked on October 31, 2011 40. physics Consider two current carrying wires shown below. The current in the wire 1 is 4.5 A in the positive x direction. Find the magnitude and direction of the current in wire 2 if the net magnetic field at point A is to be 7.5 μT in the positive z direction asked on July 25, 2011 41. Physics A train travels 84 km/h when it reaches a slower train 47 meters ahead traveling the same direction at 24 km/h. If the faster train decelerates at 2.1 m/s^2 while the slower train is at a constant speed, when will they collide? If the train that is faster asked on January 11, 2009 42. Science 3. What ratio of nitrogen and hydrogen molecules would result in no left-over reactants? Explain your answer. asked on December 6, 2019 43. Algebra You are filling a 19,400 gallon pool, w. The pool fills at a rate of 8 gallons per minute, m. The amount of water in the pool at any given minutes can be found using the equation. What is the domain and range. asked on October 16, 2019 44. Physiology Air in the alveoli has a partial pressure of nitrogen of 569 mm Hg, oxygen is 104 mm Hg, water is 40 mm Hg, Carbon dioxide is 47 mm Hg. What is the total pressure? What is the percent composition of each gas (partial pressure/total pressure x 10) asked on April 8, 2019 45. Math / Statistics Supposed that voting in municipal elections is being studied and four people are randomly selected. The accompanying, table provides the probability distribution where x is the number of those people that voted in the last election x | P (x) 0 | 0.23 1 | asked on December 18, 2018 46. Algebra Describe when the graph of f(x) = ab^x is a horizontal line.? I thought it was when a=0, but its not... asked on July 10, 2018 47. History What action did President Bush take to make the Office of Homeland Security effective? He tried to convince Congress to go to war. None of these answers He decided to commence all of the other public safety agencies and only use the Office of Homeland asked on June 17, 2018 48. Maths Jack spends 1 3/5 as long on his homework as Jill. Last week, Jill spent 7 1/4 hours doing homework. How long did Jack spend doing homework? asked on June 5, 2017 49. Math Two picture frames are similar. The ratio of the perimeters of the two pieces is 3:5. If the area of the smaller frame is 108 square inches. what is the area of the larger frame? asked on December 1, 2016 50. Physics If a basketball player has a vertical leap of 1.29 m , then what is his takeoff speed and his hang time ( total time to move upwards to the peak and then return to the ground ) ? asked on September 9, 2016 51. Math A new law requires that 15 of an individual’s income be invested in the stock market. Your accounts show that you need to put$435 in the stock market this year. How much did you earn this year? $5,040$350 $504$3,500 Refreshing this question, I got

Write the fraction as a percent. If necessary, round to the nearest tenth of a percent. 6/15 a. 40.0% *** b. 37.5% c. 33.3% d. 46.7% Write the fraction as a percent. If necessary, round to the nearest tenth of a percent. 6 4/5 a. 68% b. 6.8% c. 6.4% d.

53. Math

Can someone please check my answers? A yard has a square gate that has an area of 8 square meters. 1. What is the height of the gate in meters? Answer: 28 meters 2.How many feet would that be? Answer: 8.4 feet 3. If each side was 1 foot longer, what would

54. Math

Evaluate the following expressions: a. 11^0 b. 11^2 / 11^2 c. are the answers to parts a and b the same? Explain why or why not?

55. Science

What form of pollution, if any, does each energy source cause? How does the economy influence energy source choices? How does location influence energy source choices?

56. Math

A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probability. Write the probability as a fraction in simplest form. a. Find the theoretical probability of selecting a pink rubber

1. During the election of 1824, which candidate won the popular vote and which candidate won the presidency? a.) Andrew Jackson; John Quincy Adams ***** b.) Andrew Jackson; Andrew Jackson c.) John Quincy Adams; John Quincy Adams d.) John Quincy Adams;

58. physics

A 5.0 kg \rm kg, 52-cm \rm cm-diameter cylinder rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released. a)What is the magnitude of the

59. Chemistry

Calculate the molar solubility of MgCO3 in a solution that already contains 1.7×10−3 M sodium carbonate. MgCO3 Ksp = 6.82 x 10-6 IMPORTANT NOTE: You must use the quadratic equation to solve this problem. (DrBob222- thank you so much for all your help!)

60. physics

Find the magnitude and direction of the net electrostatic force exerted on the point charge q3 in the figure below, where q = +2.5 μC and d = 28 cm. The picture is of a square. q1=+q, q2=-2q, q3=-3q, q4=-4

61. maths

calculate the area 1.76 and 1.76 writr your 2 decimal answer to the two decimal places. i'm not sure if its 3.0976 and to the two decimal place its 3.10 could someone tell me if im right. thankyou

You are writing to a reader who favors a different solution than the one you recommend. Which of the following is MOST likely to persuade the reader? (Points: 5) Describe your reader's solution first, explain why it won't work, and then go on to describe

63. history

Which of these was a consequence of the Civil War?

64. biology

please help me with these two 1. What does the symbol TT mean to someone who studies genetics? a heterozygous b a phenotype c purebred d hybrid 2. Marty is a rat that has a long tail (T). He is heterozygous for this trait. Missy is a rat without a tail

65. chem

10.8 g of solid ammonium nitrate (NH4NO3, molar mass 80.052 g/mol) is dissolved in 150 mL of water. The temperature change, ΔT, of the system is -5.1 ºC. Calculate the heat of solution for ammonium nitrate in kJ/mol.

66. physics electricity

Cell phones use an electric field to receive and broadcast signals. A salesman claims that carrying the phone in a pouch constructed of metalized fabric will protect cell phone user’s privacy. Which of the following correctly assesses the statement and

67. math

The vertical left edge of a trapezoid is 8 inches and meets the bottom edge of the trapezoid at a right angle. The bottom edge is 4 inches and meets the vertical right edge at a right angle. The right edge is 11 inches. The top slanted edge measures 5

68. math

how do you draw and label the ray HA. Then draw point T on it?

69. math

Find the logistic function that satisfies the given conditions. 15) Initial value = 35, limit to growth = 140, passing through (1, 56) Thank you!

70. Social Studies

How did knowing how to cut and stack stones help early Andean civilizations grow?

71. Math

When you write a repeating decimal, how do you decide where to draw the bar?

72. algebra

Sam opened a savings account that accrues compound interest at a rate of 3% annually. Let P be the initial amount Sam deposited and let t be the number of years the account has been open. Write an equation to find A, the amount of money in the account

73. english

i am doing an argumentative research paper on prostution. and my main point is that whether prostution be illegal or legal. i am confused with the terms "legalization" and decrimalization of prostution. i need help. thank you

74. Algebra

I need the answers to pre algebra pizzazz pg 50 How did the angel lose his job I have the riddle I need the work!! Plz help me!!

75. English

What is the function of the gerund in this sentence Representing the junior class was her job as a memeber of the Student Senate

76. Algebra

On a given day, a vendor made less than $40 from hot dog and pretzel sales. The inequality graphed below represents the number of hot dogs (x) and pretzels (y) he could have sold and made less than$40. Which combination of hot dogs and pretzels could the

77. Geometry

right triangle ABC B is vertex with right angle

13. how did the embargo act of 1807 affect south carolina? a. it hurt the sale of the planters' rice and cotton b. it hurt the planters who needed british manufactured goods c. it hurt the aristocrats who could not longer send their sons to school in

79. ENGLISH HELP PLS

Identify the choice that best describes the sentence. 5. More than 1,000 years passed before Copernicus proposed that the earth orbited the sun. (1 point) a. simple*** b. compound c. complex d. compound-complex *** = my answer

80. algera help plzzzz

In the diagramâ€‹ below, what is the relationship between the number of pentagons and the perimeter of the figure theyâ€‹ form? Represent this relationship using aâ€‹ table, words, anâ€‹ equation, and a graph. Let x=the number of

81. Math

The angle of elevation to the top of a tower is 27 degrees, taken from a point 19 meters from the base of the tower. How high is the tower?

What are the political, economic,and social reasons why the stamp act was not fair to the colonist?

A Surprising Point of View: A Television Play in Two Acts Characters: (in order of appearance) 1. JASON: a boy of about 14. He is a student in Ms. Smith’s English class. He regularly misbehaves in order to get attention, and he doesn’t apply himself to

84. Algebra

Jay weighs 20 pounds more than Dan whose weight is twice what Kirsten's is. Their total weight is 320 pounds. How much does Kirsten weigh?

85. math

2. Manufacturer A produces hammers that are normally distributed with a mean weight of 4.6 lb and a standard deviation of 0.8 lb. Manufacturer B produces hammers that are normally distributed with a mean weight of 6.3 lb and a standard deviation of 1.4 lb.

86. Algebra

A cash drawer has \$267.00 total. There are no bills larger than a 10. There are 11 tens and 7 more 1s than 5s. How many of each bill is there?

What happens to companies with high operating leverage when the market declines? What happens when the market expands?

88. Finance

What happens to the cash flow statement for a company operating on a calendar year when a sale is made in December but the firm isn’t paid until the following January?

89. Finance

1. What happens to companies with high operating leverage when the market declines? What happens when the market expands?

90. Science

Identify the benefits that your space mission might provide for modern society. Explore the possibility of connecting your space mission with satellites that are already gathering information as they orbit Earth. I don't understand what does this mean?

91. Math

You have to choose a battery brand to use in your smoke alarm. Company A's batteries have a mean lifespan of 1.2 years, with a standard deviation of 0.1 years. Company B's batteries have a mean lifespan of 1.5 years, with a standard deviation of 0.9 years.

92. Chemistry

What is the Ka of the amino acid serine if it is 34.5% dissociated at pH- 9.46?

93. Chemistry

Consider the titration of 41.2ml of 0.230 M HF with 0.220 M NaOH . Calculate the ph after the addition of 11.9ml of sodium hydroxide.(HF: Ka = 3.50 x 10-4) Please, I need step by step on on how to solve this type of problem. Thank you very much!

94. Physics

The conducting rod ab shown below makes frictionless contact with metal rails ca and db. The apparatus is in a uniform magnetic field of 0.855 T, perpendicular to the plane of the figure. The length L of the rod is 25 cm. (a) Find the magnitude of the emf

95. Physics

The conducting rod ab shown below makes frictionless contact with metal rails ca and db. The apparatus is in a uniform magnetic field of 0.855 T, perpendicular to the plane of the figure. The length L of the rod is 25 cm. (a) Find the magnitude of the emf

96. Physics

A proton is released from rest in a uniform electric field. After the proton has traveled a distance of 10.0 cm, its speed is 1.4 x 106 m/s in the positive x direction. Find the magnitude and direction of the electric field.

97. science

julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

98. science

julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

99. science

julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.