# Shay

Popular questions and responses by Shay
1. ## chemistry

Write the formulas of the compound Al+3 formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

2. ## chemistry

For each of the following bonds, indicate the positive end with \delta^{+} and the negative end with \delta^{-}. Write an arrow to show the dipole for each. 1. Si-Cl 2. Se-F 3. Br-F 4. N-H 5. N-P

3. ## chemistry

What two conditions necessary for molecules to be polar? Her's my answer pls check. First, at least one covalent bond in the molecule has to be a polar covalent bond. For a bond to be polar, there must be a difference in the electronegativities of the two

4. ## Geometry

Write a rule in function notation to describe the transformation that is a reflection across the y-axis. A. Rx-0(X,Y) B. Ry-0(X,Y) C. Ry-x(X,Y) D. Rx--1(X,Y)

5. ## Algebra

Graph the line whose x-intercept is -8 and whose y-intercept is -7

6. ## chemistry

Write the formulas of the compound NH4+ formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

7. ## chemistry

When californium-249 is bombarded by oxygen-18, a new isotope and four neutrons are produced. Express your answer as a nuclear equation.

8. ## chemistry

The half-life for the radioactive decay of calcium-47 is 4.5 days.If a sample has an activity of 4.00uCi after 13.5 days, what was the initial activity of the sample?

9. ## chemistry

Radon-222 undergoes alpha decay.what is the nuclear equation

10. ## physics

What is the kinetic energy of a 20 kg dog that is running at a speed of 7.3 m/s (about 16 mi/h)?

Polygon ABCD is reflected and dilated to give polygon PQRS. The coordinates of the preimage are (2, 2), (6, 8), (12, 8), and (16, 2). The coordinates of the image are (11, 15), (9, 12), (6, 12), and (4, 15). What is the scale factor of the dilation? 0.25

12. ## chemistry

is IBr a hydrogen bonding or dipole-dipole interactions or dispersion forces

which is the best paraphrase of these lines from "January"? Fat Snowy Footsteps Track the floor, A)Thick, snowy footprints show where animals walked B)Thick, snowy outlines of feet mark the floor ****** C)Large snow boots lie on the floor of the house D)A

23. ## algebra

P=b+2s Solve for s

24. ## Pre calculus

Find cos theta and cot theta if sin =1/4 and tan theta

25. ## math

Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the cards in a hat. What is the probability of picking an N? 8/1 7/1 1/8 1/7

26. ## geometry

In triangle GHJ, GH=32, HJ=63, and m

27. ## Math

Consider the congruence 6x=15(mod 21). How many solutions does the congruence have? What are all the solutions?

28. ## Math

Each exterior angle of a regular polygon is 15 degrees. How many sides does the polygon have? and What is the sum of the interior angles? Since this is not my area of expertise, I searched Google under the key words "polygon angles" to get these possible

29. ## math

simplify the following expressions involving complex numbers. (3+2i)-(-7-i) is i like x? and how would this work i know that you do this: (3+2i)(7+i) to get rid of the sign between the expressions. but then what?

30. ## Chemistry

A rectangular solid of unknown density is 6cm long, 3cm high, and 7cm wide. The mass of this solid is 250g. Calculate the density.

31. ## Social Studies

Compare and contrast the climates of the mainland and the islands of Southeast Asia

32. ## language arts

The italicized words make up which type of verbal phrase? Turning the corner, Kate bumped into David. A. Split infinitive B. Gerund C. Infinitive D. Participial

33. ## solid mensuration

What is the area of a section bounded by a closed elliptical figure whose major and minor segments measure 60 m and 40 m, respectively?

34. ## physics

If the water had lost 12000 joules and the calorimeter gained 1300 joules as the temperature of both rock and calorimeter increased from 22°C to 73°C and the mass of rock in the calorimeter was 185 grams, what is the specific heat, c, of the rock

35. ## pre- algebra 1

Jose has 9 more comic books than Robin.Robin has 5 more comic books than Lee. If jose has 23 comic books,how many comic books dose Robin have? How many comic books dose Lee have?

36. ## Chemistry

which sign of chemical reaction is not detectable by sight?

37. ## chemistry

what is the lewis dot structure for BN

38. ## chemistry

Write the formulas of the compounds formed Pb+4 with the following anions:OH-, NO3- , CO3(2-), HSO4- , PO4{3-} . Use the given order of anions.

39. ## physics

The tops of the towers of the golden gate bridge in san Francisco, are 227m above the water. suppose a worker drops a 655g wrench from the top of a tower. if the average force of air resistance is 2.20 percent of the force of free fall what will the

40. ## world geography

how did deng's four modernizations program greatly increase china's farm production

41. ## algebra

A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. you have to equate h to 6: h = 6 ----> 5t^2+10t+2

42. ## Math

A plane is flying with an airspeed of 190 miles per hour and heading 140°. The wind currents are running at 25 miles per hour at 165° clockwise from due north. Use vectors to find the true course and ground speed of the plane. (Round your answers to the

43. ## Chemistry

The following solutions are combined in a calorimeter to determine the enthalpy of the neutralization reaction. 100.0 mL sodium hydroxide, NaOH, of unknown concentration an excess of 1.3732 M hydrochloric acid, HCl. The experimental value for q is

44. ## Chemistry

Consider the neutralization between the following two solutions: 100.0 mL 0.9285 M hydrochloric acid, HCl 150.0 mL 1.8269 M sodium hydroxide, NaOH How many moles of water are produced by this neutralization?

45. ## Physics

A state trooper’s car sends out a radar signal at a frequency of 14 GHz. Find the wavelength of this signal. The wave speed is 2.998 × 108 m/s. Answer in units of m

46. ## English

Why does Squeaky not know at first who has won the race in "Raymonds Run"? A. Raymond has climbed a fence*** B. The may pole gets in the way C. The finish is very close D. Mr. Person speaks to softly

47. ## math 107

Suppose you want to have $600,000 for retirement in 35 years. Your account earns 7% interest. a) How much would you need to deposit in the account each month?$ b) How much interest will you earn?

52. ## Chemistry

Po-210 Ia an alpha emitter with a half-life of 138 days. how many grams of Po-210 remain after 552 days if the sample initially contained 5.80g of Po-210?

53. ## Math/209

Dimensions of a Box A box is made from a rectangular piece of metal with length 50 inches and width 40 inches by cutting out square corners of length x and folding up the sides. (a) Write an expression that gives the surface area of the inside of the box.

54. ## pre-algebra

Use algebra tiles to find the difference. Let one white tile equal +1and one black tile equal -1.6-(-9) Thanks

55. ## chemistry

What is the complete ionic equation for the double displacement reaction: CuNO3(aq) + K2S(aq)= what is the chemical name and formula of this chemical reaction? plsss. need help

56. ## chemistry

decomposition of water to form elemental Hydrogen and Oxygen gas. What will be the balanced chemical equation, type of reaction and the driving force of the reaction?

57. ## chemistry

If the boron nitride molecule,BN, were to form, what would its structure look like? pls. need help

58. ## chemistry

Write the formulas of the compound Pb+4 formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

59. ## chemistry

Technetium-99m is an ideal radioisotope for scanning organs because it has a half-life of 6.0 {\rm hr} and is a pure gamma emitter. Suppose that 280{\rm mg} were prepared in the technetium generator this morning. How many milligrams would remain after the

60. ## math, trig

Graph one period of the following function. Show all work . y=2sinx+2cosx

77. ## math

find the volume of the cylinder. use 3.14 for pi the top is 34 and the bottom is 27

78. ## math

Sara needs to cover the top and sides of the cylinder below. 8 12 about how many square inches of paper will Sara need? 352 402 804 1005

79. ## Managerial finance

Your company contemplates buying a computer based inventory management system for 200 000. It will depreciated on a straight line basis to zero over its 4 year life span, when it will be sold for 30 000. the system will save the firm 60 000 pre-tax (EBIT)

85. ## Organic chemistry

An unknown compound (x) melts at 60°C and is mixed with a compound (y) that melts at 45°C and is soluble in x. Will the Melting point for the mixture start below 45°? I think so, because if you look at ice and salt for an example, salt has a way higher

86. ## pysical science

An automobile with a mass of 1258 kg accelerates at a rate of 5 m/s² in the forward direction. What is the net force acting on the automobile?

87. ## Chemistry

At 700 k the equilibrium constant Kc for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7*10^6. The rate constant for the reverse reaction at this temperature is 0.54 M^(-1)s^(-1). What is the value of the rate constant for the forward reaction

88. ## math

Dan has walked 1/3 of the way to school. What fraction describes how far he still has to go? Is it 1/4,1/2,2/3,3/1

89. ## Math

Ms. Williams has 3 liters of lemonade. She wants to divide the lemonade into eight portions to give her 8 grandchildren. How can she divide the lemonade into eight equal portions

90. ## algebra2

Use the four functions below for this question: f(x) g(x) h(x) j(x) Jesse got $5 from his dad and he makes$2 each time he walks the neighbor's dog. x g(x) –2 –1 2 –9 6 –17 j(x) = 2x – 5 Compare and contrast these four functions using complete

91. ## science

How would the ecosystem’s carrying capacity for a species change, if the species cannot adapt to changes of habitat?

92. ## Science

are animal species just any kind of animals.

93. ## Social Studies

Beginning in the 1600s, the Tokugawa shoguns who ruled Japan tried to maintain stability and order by A. increasing trade with Europeans. B. conquering nearby countries to creat barriers to invasion. C. developing a new style of writing that was not

94. ## math

A rectangular piece of construction paper is 11 inches long and 8 inches wide. How could it be cut to make a rectangle that has an area of 32 square inches?

95. ## Psychology

Within each Gene element of DNA are arranged in a particular proteins, this code effect every aspect of the body from structure to chemical and keeps it running process describes what?

96. ## math proportions

At a certain time of the day, a 5 foot 1 inch woman casts a 3 foot 4 inch shadow. How tall is a nearby tree that casts a 12 foot 10 inch shadow at the same time of day? Answer in feet and inches. Do not round until the final answer. Then round to the

97. ## CHEMISTRY

What should be observed during titration? My answer: We observe the change in color and change in turbidity of the sol'n. Am I right? Please add more things to be observed during titration. THANK YOU!

98. ## CHEMISTRY

Cite three methods of analysis of a substance from a given sple by titrimetric method of analysis. My answer is: -direct method -indirect method -back titration method Is it right??

99. ## physics

Joel is walking down a street and sees a 115 ft tall building in front of him. He stops 190 feet from the base of the building at the tip of the building's shadow. Round answers to three decimal places.