# anon

Most popular questions and responses by anon
1. ## Chemistry

On another planet, the isotopes of titanium have the following natural abundances. Isotope 46Ti Abundance 70.900% Mass(amu) 45.95263 Isotope 48Ti Abundance 10.000% Mass(amu) 47.94795 Isotope 50Ti Abundance 19.100% Mass(amu) 49.94479 What is the average

2. ## Chemsitry

The Ksp of PbBr2 is 6.60× 10^–6. What is the molar solubility of PbBr2 in pure water? What is the molar solubility of PbBr2 in 0.500 M KBr solution? What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution?

3. ## P.E HELP

1.   The average individual should consume ______ calories on a daily basis. 1,000 2,000 3,000 5,000 i think it is 2,000 but not sure

4. ## S.S.

which event would benefit to producers rather than toy consumers?

5. ## Art

During which time period were artists keenly interested in using the golden ratio in their paintings? A.Baroque Period B.Oriental Period C.Futuristic Period D.Renaissance Period When the Greeks built the Parthenon its dimensions nearly matched the golden

6. ## Chemistry

(a) Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 150 mL of solution. (b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid? (c) How many milliliters of 6.00 MNaOH solution are needed to

7. ## Science

Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer efective in killing the bacteria they once killed. How does the theory of evolution explain this?

8. ## Math

Anita can clean a typical pool in 8 hours. Chao can clean a typical pool in 6 hours. How long should it take Anita and Chao working together to clean a typical pool? I'd like to know how to work out this problem in order to find the answer.

9. ## Chemistry

Classify each of the following as a redox reaction or a non-redox reaction. Zn+CuCl2 -> ZnCl2+Cu HCl+NaOH -> H2O+NaCl 2CO+O2 -> 2CO2 SO3+H2O -> H2SO4

10. ## chemistry

A 15.27 g sample of Mo2O3(s) is converted completely to another molybdenum oxide by adding oxygen. The new oxide has a mass of 18.33 g. Add subscripts below to correctly identify the empirical formula of the new oxide.

11. ## Chemistry

An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. The solution is weakly conducting compared with a solution of NaCl of the same concentration. Which of the following substances could the unknown be: KOH,NH3,HNO3,

12. ## Calculus AP

f is a differentiable function on the interval [0, 1] and g(x) = f(2x). The table below gives values of f ′(x). What is the value of g ′(0.1)? x 0.1 0.2 0.3 0.4 0.5 f ′(x) 1 2 3 –4 5 The answers are: 1 2 4 cannot be determined I got 1 please let me

13. ## MATH HELP ASAP

For questions 1–4, find the slope of the following graphs. 1. a. 1/2 b. 2 c. 2 d. -1/2 2. a. 3/2 b. 1 c. -1 d. -3/2 3. a. 2/3 b. 3/2 c. 3 d. -2/3 4. a. 0 b. 1 c. -1 d. undefined For questions 5 and 6, find the slope of the line that goes through the

14. ## math, probability

Let X1,X2,… be a sequence of independent random variables, uniformly distributed on [0,1] . Define Nn to be the smallest k such that X1+X2+⋯+Xk exceeds cn=n2+n12−−−√ , namely, Nn = min{k≥1:X1+X2+⋯+Xk>cn} Does the limit limn→∞P(Nn>n)

15. ## Chemistry

4.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.20 M, where it remained constant. A(s) B(g)+C(g) Then, the container volume was doubled

16. ## English

I have a few questions. It was a long assignment and most of the questions were easy but a few I'm nervous about. Short story "The Olympic Swimmer" Who will be the winner bold? Athletes from both far and near Train and strain to be the best. But who will

17. ## english

Which of the following text examples supports the conclusion that Father will never stop building things? Choose all that apply. A) he builds Dragonwings despite the financial hardship it causes. B) after setting a kite free, he offers to build separate

18. ## Algebra 1

Measures of Central Tendency and Dispersion Practice 2. Tell which measure of central tendency best describes the data. Time spent on Internet (min/day) 75 38 43 120 65 48 52 A. Mean B. Median C. Mode Help? I really don't understand this :/

19. ## Chemistry

Sort each of the following events based on whether the solubility of the indicated gas will increase, decrease, or stay the same. Each phrase specifies the gas involved and the change in its environment. 1. The temperature is increased 2.the partial

20. ## chemistry

Calculate the pH of the resulting solution if 30.0 mL of 0.300 M HCl(aq) is added to (a) 35.0 mL of 0.300 M NaOH(aq). (b) 40.0 mL of 0.350 M NaOH(aq).

21. ## Phychology CHECK my answers

My answers have the star 1. The nervous system is the body’s ______________ network. (1 point) communication*** organization reactive production 2. The central nervous system (CNS) consists of the brain and the ___________. (1 point) heart neural network

22. ## American Government check my answers

1. According to the excerpt, the ruling on Obergefell v. Hodges did what? Select all that apply. (2 points) extended and continued the protections of the Equal Protection Clause to same-sex couples*** applied the Fourteenth Amendment to race rendered the

23. ## Science test

Can someone please help me with science test answers!! Why do scientists use models of natural systems? A- Scientist use models of natural systems because these systems are often too large or too small or too complex to study directly B-Scientists use

24. ## math , probability

Jack has a collection of 10 pairs of gloves in his wardrobe. Before a business trip, he has to pack his luggage, and he selects 8 gloves, without looking at them. We assume that any set of 8 gloves is equally likely to be chosen. Find the probability that

25. ## Biology

1. Which of the following is the definition of ecology? the social movement with a goal to protect the environment the recycling of human-made materials to reduce waste going into landfills the study of interactions among organisms and between organisms

26. ## English

Read these lines from T.S. Elliot's "Preludes." "Six o’clock./The burnt-out ends of smoky days./And now a gusty shower wraps/The grimy scraps/Of withered leaves about your feet/And newspapers from vacant lots..." Which of the following is being

27. ## Physics

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both reach the edge of a 7.8 m waterfall. If the spy's speed is 11 m/s and the officials' speed is 22

28. ## math, probability

Let X and Y be independent random variables, uniformly distributed on [0,1] . Let U=min{X,Y} and V=max{X,Y} . Let a=E[UV] and b=E[V] 1. Find a 2. Find b 3. Find Cov(U,V) . You can give either a numerical answer or a symbolic expression involving a and b .

29. ## English check my answers

For the following questions, identify the correct form of irregular verbs in the sentences. Choose from the word box below. A. past B. present participle C. past participle 47. Claude is getting a new computer for his birthday this year. (1 point) A B****

30. ## Spanish

I would appreciate it if someone could check my answers immediately please!!!!!!! I don't need answers, I just need someone to see if mine are correct. 1. Translate the following into Spanish: "Where is the door?" A-Dónde es la puerta? B-Dónde están la

31. ## Physics

A cube of mass m1 = 6.8 kg is sitting on top of another cube of the same size and mass m2 = 0.7 kg while they are both in free-fall. Ignoring any air resistance, what is the magnitude of the normal force with which the bottom cube is acting on the top

32. ## American government check my answer

5. Which of the following are examples of discriminatory laws passed by the U.S. government that impacted those depicted in the photo? Select all that apply. (2 points) Chinese Exclusion Act Civil Rights Act of 1965 Immigration Quota Act DREAM Act my

33. ## Grammar

Which of the following is a complex sentence? A.After the class, we all went to Alec's house. B.Alec's brother John was home, but his sister Cynthia wasn't. C. Alec suggested we all go to the neighborhood pool. I'm thinking the answer is A, but I'm not too

34. ## geography

Check my answers, please? I put an asterisk next to which ever ones are my answer. Thanks! Why do you think the Inuit have retained aspects of their early culture? *A.because they are used to that lifestyle B.because such adaptations allow them to survive

35. ## Chemistry

Which of the following reagents would oxidize Cr to Cr2 , but not Fe to Fe3 ? Ca Co Ca2+ Br2 Co2+ Br- Which of the following reagents would oxidize Cu to Cu2 , but not Cl– to Cl2? Br2 Ca Co2+ Co Br- Ca2+

36. ## spanish

if you greet someone who is your age how do you ask how are you in spanish?

37. ## math , probability

We observe a Poisson process with unknown rate. The rate lambda of the Poisson process is either 2 or 4, with equal probability, and the actual value is not known. We observe the process over the time interval 0, 3 and observe exactly 9 arrivals. Given

38. ## Physics

Three dynamics carts have force sensors placed on top of them.(cart 1, with mass of 2.2 kg, has one sensor --> cart 2, with mass of 2.5 kg, has sensors two and then three --> cart 3, with mass of 1.8 kg, has sensors four then five). Each force sensor is

39. ## calculus

A 5.5 foot tall woman walks at 6ft/s torward a street light that is 16.5 ft above the ground. what is the rate of change of the length of her shadow when she is 14ft from the street light? At what rate is the tip of her shadow moving? How do I get the

40. ## math

The pressure P, of a gas varies inversely with its volume, V. Pressure is measured in units of Pa. Suppose that a particular amount of a gas is initially at a pressure of 84 Pa at a volume of 36 L. If the volume is expanded to 216 L, what will the new

A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days: f(n) = 8(1.05)n Part A: When the scientist concluded his study, the height of the plant was

42. ## Math - Probability

A spinner is divided into 11 equal sections numbered from 0 to 10. You spin the spinner once. What is P(even)? a. 3/5 b. 1/2 c. 5/11 d. 6/11

43. ## Chemistry

A solution is 5.0× 10–5 M in each of these ions: Ag , SO42–, Cl–, CO32– Which precipitate will form? Ag2SO4 (Ksp = 1.12× 10–5) AgCl (Ksp = 1.77× 10–10) Ag2CO3 (Ksp = 8.46× 10–12)

44. ## math

noone has helped me? . Suppose that the total market demand for a product consists of the demands of individual 1 and individual 2. The demand equations of the two individuals are given by the following equations: QD,1 =20-P QD,2 =60-5P Suppose that the

45. ## Grammar (Last one :) )

Except for Ronnie and _____, everyone was on time. him(my answer) he Between you and _____, I know the answer to the mystery. I me(my answer) Leave your message with Ms. Horioka and _____. me(my answer) I It was Geraldine Ferraro _______ ran for vice

46. ## Math

The box-and-whisker plot below shows the numbers of text messages received in one day by students in the seventh and eighth grades at Lincoln Middle School. Two box and whisker plots are shown above a number line. The number line is scaled from 2 to 38 by

47. ## NHD (Social Studies)

Please help me out on answering this question: For a working bibliography, how is a title for a website cited? Thank you tutors for reviewing the question. I might have more social studies questions and then algebra questions, so if you see more questions

1. Like the modernists, postmodern writers focused on subjective experience rather than objective cultural norms. (1 point) expressing or dealing with facts or conditions as perceived without distortion by personal feelings, prejudices, or

49. ## social studies

which statement correctly contrast the Lancaster turnpike with the national road 1. the Lancaster turnpike was a longer road 2. the national road required users to pay a toll to use it 3. the national road was a corduroy road 4. the Lancaster turnpike was

50. ## Geography

What kind of map could you use to show information about a city? -a relief map -a population density map -a political boundary map -a vegitation map -All of the above You can pick as many as you want, but the question is only worth one point. I think the

51. ## Chemistry

Consider an amphoteric hydroxide, M(OH)2(s), where M is a generic metal. M(OH)2 (s) M^2+ (aq) + 2OH- (aq) Ksp=4e-16 M(OH)2 (s) + 2OH- (aq) M(OH)4 ^2- (aq) Kf=0.06 Estimate the solubility of M(OH)2 in a solution buffered at pH= 7.0, 10.0, and 14.0 I'm not

52. ## Science

Scientists wondered how volcanoes could be located so far from tectonic plate boundaries until one proposed the idea of (Hotspots, Mid-ocean ridges, transform faults, plates), where the magma is much hotter than the surrounding magma. These are

53. ## Chemistry

Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e- -> Ni(s) E=-0.26 Au3+(aq) + 3e- -> Au(s) E=+1.498 G= ? KJ Would it be G=1.758? •Chemistry - DrBob222, Sunday, March

54. ## American Government

When Alabama's governor refused to end the policy of segregation in public universities, he invoked which common argument for separation of powers under federalism? A.states' rights B.checks and balances C.direct initiative D.bicameral legislation I think

1. A bag contains 9 green marbles and 11 white marbles. You select a marble at random. What are the odds in favor of you picking a green marble? a. 9:20 b. 2:9 c. 11:9 d.9:11 my answer is d? 2. A bag contains 5 green marbles, 8 red marbles, 11 orange

56. ## Chemistry

One liter of a buffer composed of 1.2 M HNO2 and 0.8 M NaNO2 is mixed with 400 mL of 0.5 M NaOH. What is the new pH? Assume the pKa of HNO2 is 3.4.

57. ## Social Studies

compare and contrast the views of the federalist party and the democratic republican party on at least three different historical issues?

58. ## Science

To create less waste in the first place is to a. reduce (?) b. reuse (?) c. recycle d. incinerate Hi. So, for this question, i completely understand what it's asking but i can't figure out which one it would be. Incinerate means to burn waste, but that

59. ## Chemistry

The enthalpy of combustion of butane C4H10 is described by the reaction: C4H10(g) + (13/2) O2(g) -> 4CO2(g) + 5H2O(g) ΔH°rxn = –2613 kJ/mol Given the following enthalpies of formation: ΔH°f[CO2(g)] = -393.5 kJ/mol ΔH°f[H2O(g)] = -241.8 kJ/mol

60. ## chemistry

A volume of 100mL of 1.00 M HCl solution is titrated with 1.00 M NaOH solution. You added the following quantities of 1.00 M NaOH to the reaction flask. Classify the following conditions based on whether they are before the equivalence point, at the

61. ## permutation and combination

The game of euchre uses only the 9s, 10s, jacks, queens, kings, and aces from a standard deck of cards How many five-card hands have at least two red cards?

Julia is allowed to watch no more than 5 hours of television a week. So far this week, she has watched 1.5 hours. Write and solve an inequality to show how many hours of television Julia can still watch this week.

63. ## physics

A spring scale hung from the ceiling stretches by 6.1 cm when a 2.0 kg mass is hung from it. The 2.0 kg mass is removed and replaced with a 2.5 kg mass. Part A What is the stretch of the spring?

64. ## English

tell how using a reading role helped you understand the book. The reading roles are described in the link of unit 4, lesson 1, slide 4. support your response with at least two pieces of evidence from the novel. This is for Johnny Tremain.

65. ## Chemistry

The boiling point of an aqueous solution is 102.48 °C. What is the freezing point? I know that formula for freezing point is delta Tf = Kf*m but what do I plug in for each?

1.Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the card in a hat. What are the odds in favor of picking an I? a. 5:3 b. 3:5 c. 3:7 d. 1:2 my answer is b? 2. Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the cards

67. ## Chemistry

A metal foil has a threshold frequency of 5.45 x 10^14 Hz. Which color of visible light will not eject electrons from this metal? a) blue b) indigo c) violet d) orange c=(wavelength)(v) 3.0x10^8m/s = (wavelength)(5.45 x 10^14 Hz) 550 nm -> releases green.

69. ## Physics

A stone is tied to a string (length = 0.700 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

An Internet search for information about franchise businesses will not help you find out A. the number of hours you'll have to put in. B. start-up costs. C. the variety of franchise businesses available. D. support you'll receive from the parent

71. ## English

Choose the word or phrase that best defines the italicized word. "An aged man is but a *paltry* thing,/ A tattered coat upon a stick..." a.inadequate b.invisible c.significant d.unwise

72. ## Algebra 1

Your school wants to take out an ad in the paper congratulating the basketball team on a successful season, as shown to the right. The area of the photo will be half the area of the entire ad. What is the value of x? Round answer to nearest hundredth. Use

73. ## Math

A rectangle is dilated using a scale factor of 6. The image is then dilated using a scale factor of 1/3. What scale factor could you use to dilate the original rectangle to get to the final rectangle. Explain.

74. ## Physical Science

You have a sealed glass jar full of air. If you put it in the freezer, what happens to the gas pressure in the jar??

75. ## history

1) what significant effect did The Treaty of Paris, signed after the French and Indian War, have on the French (1 point) a) France had to withdraw its empire to Central and South America b) France had to allow the British to claim and settle the Ohio

76. ## chemistry

Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products. HCHO2(aq)+H2O(l)⇌H3O+(aq)+CHO−2(aq) Use A for [HCHO2], B for [H2O], C for [H3O+], D for [CHO−2].

77. ## intro to computers

You are shopping for a new computer. You see the memory listing as 1GBX4. What does this mean? A. 4 DDR first generation DIMMs B. 1 GB of memory made up of 4 DIMMs C. 4 GB of memory made up of 4 DIMMs D. 1 DDR fourth generation DIMMS ????

78. ## us history

What was the main effect of the Civil War on the women's movement? A. The women's movement shifted their focus to helping widows of the Civil War. B. The movement was put on hold while women focused on anti-slavery reform and the war effort. C. The

79. ## Calculus

Michael Perez deposited a total of $4000 with two savings institutions. Bank A pays interest at the rate of 5%/year, whereas Bank B pays interest at the rate of 8%/year. If Michael earned a total of$308 in interest during a single year, how much did he

80. ## english, check please :)

Read this excerpt from a speech on women's rights delivered by Elizabeth Cady Stanton on July 19, 1848: We do not propose to petition the legislature to make our husbands just, generous, and courteous, to seat every man at the head of a cradle, and to

81. ## Math

The bottom of a shopping bag measures 8 inches by 10 inches. The bag has a height of 12 inches. How much paper is needed to make the bag?

82. ## history

What policies led to the Boxer Rebellion?

83. ## Chemistry

Given ∆Hºrxn = -1670 kJ/mol for 2Al(s) + (3/2)O2(g) --> Al2O3(s), determine ∆Hº for the reaction 2Al2O3(s) --> 4Al(s) + 3O2(g). I flipped Al(s) + (3/2)O2(g) --> Al2O3(s) to Al2O3(s) --> A(g) + (3/2)O2(s) and multiplied the molar values by 2. I ended

84. ## check english please.. romeo and juliet

Read this excerpt from the prologue to act II of Romeo and Juliet: CHORUS: Now old desire doth in his death-bed lie, And young affection gapes to be his heir; That fair for which love groan'd for and would die, With tender Juliet match'd, is now not fair.

85. ## Grammar

Which of the sentences below displays the correct punctuation? A.The patient looked at the doctor as though he had never seen her before. B.Even though Laura is very young she is already a skilled chess player. C.Carlos asked me to buy the gift, since I am

86. ## Chemistry

Check my answer please? A reaction requires 22.4 L of gas at STP. You have 45.0 L of gas at 100 kPa and 373 K. Which of the following statements is true? The gas constant is 8.31 L-kPa/mol-K. You will have an excess of gas and the reaction will occur.

87. ## Algebra 1

9. Find the solutions to the system. y=x^2+5x+6 y=4x+12 A. (2,20) and (-3,0) B. (2,20) and (-3,-18) C. (-2,-20) and (-3,-18) D. no solutions 10. Find the solutions to the system. y=x^2-3x-1 y=8x-1 A. (0,-1) and (11,388) B. (0,-1) and (11,87) C. (-1,0) and

88. ## Chemistry

To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 16.0 g, and its initial temperature is -11.4 °C. The water resulting from the melted ice reaches the temperature of your skin, 31.0 °C. How much

89. ## Chemistry

Sodium sulfate is slowly added to a solution containing 0.0500 M Ca^2+ (aq) and 0.0390 M Ag^+ (aq). What will be the concentration of Ca^2+ (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca^2+ (aq) can be separated from the Ag^+ (aq) by

90. ## am I right ? or no?

Which equations represent exponential growth? Which equations represent exponential decay? Drag the choices into the boxes to complete the table. Exponential Growth: y=4000(1.0825)^t ,y=12,000(0.72)^t , y=8000(0.97)^t , Exponential Decay: y=1700(1.25)^t ,

91. ## Grammar

Which of the following combines the sentences below by coordinating? Senate pages may be between fourteen and seventeen years old. Pages in the House must be high school juniors or seniors. A.Senate pages may be between fourteen and seventeen years old,

92. ## Math

which shape has 5 faces 5 vertices and 8 edges? triangular Pyramid** Rectangular pyramid Pentagonal pyramid

93. ## Chemistry

Which of the following will be more soluble in an acidic solution than in pure water? Be(OH)2 Ag2SO4 RbClO4 CuCN Cul

94. ## Chemistry

The figure below is a heat curve for an unknown outerspace substance discovered by the Mars rover. By understanding the heat curve, scientists can make inferences about the composition of the planet. What is the temperature of fusion, Tfusion, and

95. ## Chemistry

A 32 W (1 W = 1 J/s) lamp generates violet light at a wavelength of 420 nm. How many photons of this light will the lamp generate in 2.0 s?

96. ## chemistry

How many moles of HNO3 are present if 0.236mol of Ba(OH)2 was needed to neutralize the acid solution?

97. ## Science/English

According to Al Gore in An Inconvenient Truth, how is wind power beneficial in the fight against global warming? a.) it uses wind panels to trap the power of the wind b.) it emits water vapor, which cools the atmosphere c.) it creates a vast amount of

98. ## Chemistry

In which direction will the net reaction proceed X(g)+Y(g)Z(g) Kp=1.00 at 300k for each of these sets of initial conditions? a) [X]=[Y]=[Z]=1.0 m net reaction goes to the left net reaction goes to the right reaction is at equilibrium I chose 3 for a. b)