# HELP!!!

Popular questions and responses by HELP!!!
1. ## chem

Arrange the following amines in order of decreasing base strength. NH3, NH2Br, CH3NH2, (CH3)2NH

2. ## chemistry

Convert 3.01 x 1023 molecules of C2H6 to moles.

3. ## physics

A 300 lb bungee jumper wants to jump from the top of a 230 ft high bridge and be able to just touch the water below (Part A figure) . Given that the bungee cord has a spring constant of 11.1 lb/ft, what should the bungee cord's relaxed length, l, be for

4. ## Math

Write the ratio of dogs to cats in simplest form. 12 dogs, 16 cats

5. ## health

A mutual consent registry is relevant to obtaining medical information about what?

6. ## Chemistry

How would you prepare 1L of a .050 M phosphate buffer at pH 7.5 using crystalline K2HPO4 and a solution of 1 M HCl? pka of H2PO4 = 7.2

7. ## chemistry

How many atoms does 2.0 moles of He represent?

8. ## Math

1. There are 14 blue marbles, 8 red marbles, and 12 green marbles in a jar. What is the ratio of the total number of marbles to the number of red marbles? (1 point) 24:8 34:8 8:34 8:24 2. Which of the following ratios is equivalent to fifteen over twenty ?

9. ## math

The quadrilateral ABCD has area of 58 in2 and diagonal AC = 14.5 in. Find the length of diagonal BD if AC ⊥ BD.

10. ## chem

A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.55?

11. ## chem

How many milliliters of a 15.0%, by mass solution of {KOH}(aq) (d = 1.14 g/mL) are required to produce 25.0 L of a solution with pH = 11.60?

12. ## chemistry

Lead metal is added to 0.100M Cr3+(aq) Pb(s) + 2Cr3+(aq) -> Pb2+(aq) + Cr2+(aq) What is [Pb3+] when equilibrium is reached? What is [Cr2+] when equilibrium is reached? What is [Cr3+] when equilibrium is reached? i solved it buh for sum reason am not

13. ## pre algebra

Which polynomial does the model represent? and then it has one big black block, 2 thin white blocks, 3 thin black blocks, 3 single white cubes, and one single black cube. Please help ASAP!!!

14. ## Chemistry

Hydrogen peroxide, H2O2, solution can be purchased in drug stores and used as an antiseptic. A sample of such a solution weighing 1.00 grams was acidified with sulfuric acid and titrated with .02000 M solution of KMnO4. The unbalanced reaction is H2O2(aq)

15. ## PHYSICS

you need to move a 500 kg crate of gazelle food from the garage along the 42 meter hall to the kitchen. If you apply a force of 1000 N at a 37 degree angle to the horizontal. How long will it take to move to the kitchen?(coefficient of static friction=.15,

16. ## history

Which of the following describes the principle of checks and balances A. congress must make sure that the national budget is balanced. B. one branch of government can check the power of another branch of government. C. power is balanced equally between the

17. ## History

Describe two ways that WWII created more oppurtunities for African-Americans. Be sure to use key terms, such as A. Philip Randolph, Executive Order 8802, the "Double V" campaign, and/or the NAACP. Describe two way that WWII stripped away the Constituitonal

18. ## physics

A basketball explodes into three separate pieces. Two pieces of equal mass shoot off at 20.3 m/s, one travelling to the south and one to the west, perpendicular to each other. The third piece has a mass 4 times the size of one of the other pieces. What is

19. ## physics

Children slide down a frictionless water slide that ends at a height of 1.80 m above the pool. If a child starts from rest at point A and lands in the water at point B, a horizontal distance L = 2.43 m from the base of the slide, determine the height h of

20. ## physics

A 0.330-kg block of wood rests on a horizontal frictionless surface and is attached to a spring (also horizontal) with a 29.5-N/m force constant that is at its equilibrium length. A 0.0600-kg wad of Play-Doh is thrown horizontally at the block with a speed

21. ## Chemistry

Both calcium sulfate and magnesium sulfate can form hydrates with water. Could white anhydrous CaSO4 or MgSO4 be substituted for anhydrous CuSo4? Why or Why not?

22. ## chemistry

How many total atoms are in 1.0 moles of H2O ?

23. ## chemistry

Calculate [Fe^2]+ when the cell reaction reaches equilibrium? A voltaic cell is constructed based on the following reaction and initial concentrations: Fe^2+,( 0.0050 M ) + Ag+,( 2.5 M ) ----> Fe^3+,( 0.0050 M ) + Ag(s)

24. ## chem

what is the pH of an aqueous solution that is 0.123M NH4Cl

25. ## Math

Salim and Medha are comparing results from a 2-day lab experiment. On Monday, Salim’s results showed that 0.907 of the particles were charged while Medha’s results showed that 88% of the particles were charged. On Tuesday, Salim’s results showed that

26. ## Social Studies

What was the purpose of Washington’s Neutrality Proclamation? A. He wanted to remain neutral when defining his policy toward trade with Spain. B. He wanted to spell out his policy for imposing taxes on imports and exports. ** C. He wanted to make it

27. ## SCI

What are some processes that a living thing’s body carries out to help it maintain homeostasis?

29. ## SCI

What makes up a habitat, and what do habitats provide to organisms? What is in the panda’s habitat that helps it to survive? What process helps an organism break down nutrients from its food in order to gain energy? What do you think will happen if a

30. ## SCI

Hi, I really need some help with the anwsers to the First one, having hard time, maybe some help plz? What are the characteristics of scientific thinking and investigating? Why is science literacy important? What skills and tools do scientists use? Why is

31. ## SS

What helped discourage invaders from trying to take over parts of Arabia? Where was Muhammad born? What did Muhammad say he had received from the angel Gabriel? What is the holy book of Islam? Why do Muslims give part of their wealth to charity? Who

32. ## SS

What contributed to the initial spread of Islam in the 600s and 700s? Why were Muslim warriors often successful? Besides warriors, who else spread the Muslim faith? How did early Arab Muslims treat people of other faiths? I need help with the answers!!!

33. ## math

Two vertices of a triangle lie on some line. The third vertex belongs to the line that is parallel to the first one. Prove the area of that triangle does not depend on the position of the third vertex on the line.

34. ## Math

If the scale factor is 2.5” = 3 ft, what is the area of the room in the real world?

35. ## Math

Explain the relationship among ​input​, ​output​, and ​function rule​.

36. ## Math!!!

A 3 x 5 table is considered to test the association of two variables having 3 and 5 categories respectively. A Chi-square test statistic with value 19.0 was obtained. What is the degrees of freedom associated with this test?

37. ## Algebra

a factory can produce two products, x and y with a profit approximated by P=14x+22y-900. the production of y can exceed x by no more than 100 units moreover production levels are limited by the formula x+2y,+1,400. what production levels yield maximum

38. ## Algebra

A recipe for a home-made disinfectant calls for adding one-half cup of clorox to one gallon of water. Mrs. Jenkins wants to make this solution in a 32-ounce spray bottle. How many fluid ounces of clorox should be added to 32 fluid ounces of water to have

39. ## Math

What was the total grocery bill? Mrs. Sanders did a lot of shopping at several stores in preparation for Thanksgiving next week. These are the items that she bought at Kroger: One 19.5 turkey @ \$0.89 per pound 5 pounds of sweet potatoes @ \$0.59 per pound 2

40. ## Algebra

Rachel sent or received 10,290 text messages in the month of September. If each text message over the first 150 messages cost 8 cents, what was her texting bill? \$126,750 Explain how you got your answer. I subtracted 10,290 by 150 then I divided 10,140 by

41. ## Math

Rachel sent or received 10,290 text messages in the month of September. If each text message over the first 150 messages cost 8 cents, what was her texting bill? Explain how you got your answer. Assuming that she slept 7 hours each day, what was the

42. ## Math

Six times a number x plus 2 times a number y is more than 4 times a number x. Solve for x.

43. ## Math

A boat can go 20 miles against a current in the same times that it can go 60 miles with the current. The current is 4 miles per hour. Find the speed of the boat with no current.

44. ## PHYSICS

Two capacitors C1 = 7.00 µF and C2 = 11.0 µF are connected in series to a 9.00 V battery. (a) Find the equivalent capacitance of the combination. µF (b) Find the potential difference across each capacitor. (c) Find the charge on each capacitor.

45. ## PHYSICS

An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.70 mm. (a) If a 16.0 V potential difference is applied to these plates, calculate the electric field between the plates. kV/m (b) What is

46. ## MATHS

Let N be the number that consists of 61 consecutive 3's. Let M be the number that consists of 62 consecutive 6's. What is the digit sum of N×M? Details and assumptions The digit sum of a number is the sum of all its digits. E.g. the digit sum of N is

47. ## MAThs

Six children are standing along the x-axis at points (0,0), (17,0), (40,0), (85,0), (173,0), (440,0). The children decide to meet at some point along the x-axis. What is the minimum total distance the children must walk in order to meet?

What is the coefficient of x^4 in (x^2−x−2)^7?

49. ## physics

A pellet gun fires ten 3.00 g pellets per second with a speed of 840 m/s. The pellets are stopped by a rigid wall. What is the average force (in newtons) exerted by the pellets on the wall?

50. ## physics

A 8.30 kg object with a speed of 34.0 m/s strikes a steel plate at an angle of 45.0 degrees with the normal to the plate, and rebounds at the same speed and angle on the other side of the normal. What is the change (in magnitude only) of the linear

51. ## physics

If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads). (a) Calculate the ideal speed to take a 105-m radius curve banked at 13.0°. km/h

52. ## physics

As shown in the figure below, a stick of length L = 0.330 m and mass m = 0.205 kg is in contact with a rough floor at one end and a frictionless bowling ball (diameter d = 21.50 cm) at some other point such that the angle between the stick and the floor is

53. ## Chemistry

A mixture of gases contains 0.4 mole of N2, 0.5 moles of O2, and 0.7 moles of H2. What is the total pressure if partial pressure of O2 is 1.3 atm?

54. ## Math

A person travels 32 meters,turns right & travels 34 more meters. It took 3 minutes. What is her speed?

55. ## math

Put these in order from least to greatest: 13/16, 5/8, 3/16, 3/4, 7/8.

56. ## math

Mark has a square shaped tulip bed in his garden. The area of the tulip bed is 400 square feet. Mark wants to put a low border fence around the tulip bed. Explain how to find the number of feet of fencing that he will need.

57. ## math

Put these in order from least to greatest: 13/16, 5/8, 3/16, 3/4, 7/8.

58. ## Calculus

Derive the integral of cos^n (x) dx= (1/n)cos^(n-1) (x) sin(x)+((n-1)/n)(integral of cos^(n-2) (x) dx

59. ## engineering

The 50-kg stone has a speed of v_A = 8m/s when it reaches point A.Determine the normal force it exerts on the incline when it reaches point B. Neglect friction and the stone's size.

60. ## programming

I need to do this but I don't know how to start! I'm so bad a this class, and I'm just taking it because is a required! Please help! Write an algorithm that solves tax calculation problem.

62. ## Math

Dominic was 8 years old when his sister was born. Now the sum of their ages i 56. How old is Dominic now?

63. ## history

what were some aspects of the ten percent plan?

64. ## history

.How did the battle between the Monitor and the Virginia change naval warfare?

65. ## Chemistry, Algebra

A baker uses dried skim milk that contains 3.0% moisture and costs \$1.16 per lb, which on a moisture free basis would be \$1.20 per lb. If liquid skim milk containing 90.5% water costs \$1.60 per gallon (8.64 lbs), what would be the comparative cost of 1lb.

66. ## physics

compared to the period of a wave of red light the period of green light is... A)less B)greater C)the same D)none of the above

67. ## math

The area of each of the four states shown of the united states is given as fractions, decimals or percents of the total area of the united states. Arrange the states in order from the largest area to the smallest area. California-4.25% Montana-1/30 New

68. ## math

thank you Ms.Sue

69. ## CHEM

A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.55?

70. ## Chemistry

The complete combustion of 0.100 mol of CH4 in oxygen in a bomb calorimeter caused the water of the calorimeter to rise in temperature from 25.00 degrees Celsius to 37.70 degrees Celsius. Suppose that the combustion of the 0.1 mol of CH4 was instead run at

71. ## Algebra

A cell phone company offers a contract which cost C, in dollars, of t minutes to telephoning is given by C=0.25(t-400)+57.95, where it is assumed that t is greater than and equal to 400 minutes. what times keep cost between \$98.95 and \$138.95? For the cost

72. ## Chemistry

How would you find the Kb of a weak base??

73. ## Science

A sneeze causes you to mementarily shut your eyes. If this process takes 0.5s and you are moving at 30km/h, how far will you travel in that time?? PLEASE SHOW STEP BY STEP because I am very confused!!

74. ## Simple Rate of Return

17.Pid has invested in a machine that cost \$70,000, that has a useful life of seven years, and that has no salvage value at the end of its useful life. The machine is being depreciated by the straight-line method, based on its useful life. It will have a

75. ## Simple Rate of Return

(Ignore income taxes in this problem.) Dum Luk & Stoo Pid has invested in a machine that cost \$70,000, that has a useful life of seven years, and that has no salvage value at the end of its useful life. The machine is being depreciated by the straight-line

17.

77. ## U.S History

The first two battles of the Revolutionary war were at ________ and ________. http://www.americanrevolution.com/RevolutionaryWarBattlesIndex.htm Be sure to scroll down. =)

1. ## Shalee ^~^

Yeah I'm I have 7 questions on mine and all of these are only 4question answers

posted on March 24, 2020
2. ## Math HELP!!!

Calculate the surface area show your work, calculate the volume show your work,write the ratio or the volume to surface area.

posted on February 26, 2020
3. ## history

i was not guessing! if your not going to help me then you can go, all i wanted was for someone to check my answer.

posted on February 21, 2020
4. ## history

is it C.?

posted on February 21, 2020
5. ## math

posted on December 5, 2019
6. ## History

check me thats my answer for 1^

posted on March 20, 2019
7. ## History

Previously slaves African americans had hopes of entirely earning their freedom and prooving their worth, Philip Randol a civil rights activits he led the brotherhood of "sleeping car porters", he actually caused President Roosevelt to have to issue

posted on March 20, 2019
8. ## sci i think its b

A. :)

posted on January 15, 2019
9. ## science !!! help

1. B 2.C 3.A 4.A 5.D

posted on January 10, 2019
10. ## Social Studies

Thank you!

posted on October 11, 2018
11. ## SCI

Nothing.

posted on September 26, 2018
12. ## science

Yes, Good Job! High Five

posted on September 25, 2018
13. ## SS

Okay this is all they give me, I Have to figure it our

posted on September 19, 2018
14. ## SS

I do Connections Academy, can you help with this? What helped discourage invaders from trying to take over parts of Arabia? Where was Muhammad born? What did Muhammad say he had received from the angel Gabriel? What is the holy book of Islam? Why do

posted on September 19, 2018
15. ## SS

My text does not help me. They just give me this. I am not kidding!!!

posted on September 19, 2018
16. ## math

posted on May 18, 2018
17. ## Language Arts

@help! Did you get the answers?

posted on December 14, 2015
18. ## Math

I don't know how to do the 5% and 2% thing.I got the whole pirce though

posted on November 20, 2014
19. ## Math

for the second one i got 20.1764705882 can you plz check it

posted on November 17, 2014
20. ## Math

Oh yeah thank you again

posted on January 21, 2014
21. ## Math

Why is it 6x+2y-3 isnt it supposed to be 4x+3

posted on January 21, 2014
22. ## Math

Thank you

posted on January 21, 2014
23. ## Math

Six times a number x plus 2 times a number y is 3 more than 4 times a number x. Solve for x. Sorry i messed up on that on this is supposed to be the right question

posted on January 21, 2014