jorge

Most popular questions and responses by jorge
1. Chemistry

In one experiment, 7.62 g of Fe are allowed to react with 8.67 g of S. What is the limiting reagent, what is the mass of FeS formed, and how much excess reagent is left, respectively? I am not sure how to solve this. I started by doing (7.62 g Fe/55.85

2. Chemistry

What is the minimum volume of 2.6 M HBr required to completely dissolve 35.0 g of potassium metal?

3. chemistry

ow many grams of aluminum chloride must decompose to produce 78.3 milliliters of aluminum metal, if the density of aluminum is 2.70 g/mL? Show all steps of your calculation as well as the final answer. (5 points) AlCl3 → Al + Cl2

4. Science

solve the system of equations algebraically. show all your steps. y=x^2+2x y=3x+20 Can someone show me step by step on how to get the answer it's, there are answers like this that is going to be on my math test and I don'tget it.

5. Physics

The occupants of a car traveling at a speed of 30 m/s note that on a particular part of a road their apparent weight is 15% higher than their weight when driving on a flat road. a. Is that part of the road a hill or a dip? b. What is the vertical curvature

6. algebra

Anita and Maria went to the candy store. Maria bought 5 pieces of fudge and 3 pieces of bubble gum for a total of \$5.70. Anita bought 2 pieces of fudge and 10 pieces of bubble gum for a total of \$3.60. Determine the cost of 1 piece of bubble gum.

7. Chemistry

A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown acid?

8. Chemistry

What minimum volume of 14.0 M hydrochloric acid would be required to completely dissolve a 600.0 −g iron bar? I'm getting around 2.3 L but it's saying it's incorrect...

9. science

suppose you are standing on a sidewalk . describe your motion relative to the car and the plane

10. us history

how did the fear of alienating the border states affect nothern strategy during the war? President Lincoln is "reported to have said that he hoped to have God on his side, but he had to have Kentucky." That's from this article:

11. Physics

You are pulling a suitcase through the airport at a constant speed. the handle of the suitcase makes an angle of 45 degrees with respect to the horizontal direction. if you pull with a force of 7.5N parallel to the handle, what is the force of friction

12. college algebra

A toy rocket is launched with an initial velocity of 44.1 meters per second from a 1 meter tall platform. The height h of the object at any time t seconds after launch is given by the function h (t)-4.9t squared +44.1t +1. How long after launch did it take

13. Chemistry

A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown acid?

14. Math Calc

If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 112 ft/sec, its height after t seconds is s(t)=48+112t–16t^2. What is the maximum height the ball reaches "in ft"?What is the velocity of the ball when it hits the

15. Physics

A quarterback throws a football toward a receiver with an initial speed of 22 m/s at an angle of 30° above the horizontal. At that instant the receiver is 23.6 m from the quarterback. With what constant speed should the receiver run in order to catch the

16. Physics

A cyclist travels a distance of 1200m due north before going 2000m due east followed by 500m south-west. Draw a scale diagram to calculate the cyclist's final displacement form her initial position?

17. Microecomics

Assume that American rise sells for \$100 per bushel, Japanese rice sells for 16,000 yen per bushel, and the nominal exchange rate is 80 yen per dollar. Explain how you could make a profit from this situation. What would be your profit per bushel of rice?

18. Chemistry

A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown substance?

19. Chemistry

If salicylic acid costs \$21 per kilogram, how much would it cost to purchase enough salicylic acid (formula mass= 138.1) to make 1.0 kilogram of aspirin (formula mass= 180.2), assuming your percent yield was obtained in the reaction? (Note 1 to 1 mole

20. physics

A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff the rock has a speed of 28 m/s. (a) Assuming that air resistance can be ignored, find the initial speed of the rock. (b)

I need help with this problem: Suppose you design a second model car that is 1/4 the size of the model car you designed in Excercise 9.What is the perimeter of the license plate on the second model car? Let me explain.The perimeter of the actual car's

22. trig

Solve triangle ABC. (If an answer does not exist, enter DNE. Round your answers to one decimal place.) a = 63, c = 50, ∠C = 53°

23. math algebra

Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. -a+b=-4 2a-3b=-2

24. physics

No glass is perfectly transparent. Mainly because of reflections, about 94% of light passes through an average sheet of clear windowpane. The 6% loss is not noticed through a single sheet, but through several sheets it is apparent. How much light is

25. math

guess my rule with two rules

26. Chemsitry

If salicylic acid costs \$21 per kilogram, how much would it cost to purchase enough salicylic acid (formula mass= 138.1) to make 1.0 kilogram of aspirin (formula mass= 180.2), assuming your percent yield was obtained in the reaction? (Note 1 to 1 mole

27. Regents biology

Baby chickens require a constant source of food.As chick's grow,more energy is required for daily activities.The following table gives the grams of food eaten by a chuck over a five day period:

28. math ,confused

The question is : Bath towels sell for \$13.25 each, while hand towels sell for \$4.50 each. Theresa buys some of each type of towel for a total of \$62.25. If she spends \$17.25 more on hand towels, how many of each type does she buy ? oh never mind I found

29. Math

Hank buys his dog food in bulk. He recently just bought a 5 lb. bag of food. If he uses a scooper that holds 1/8 of a cup of food, how many days can he feed his dog?

30. Physical Geography

Assume that a parcel of air is forced to rise up and over a 6000-foot high mountain (shown below). The Initial temperature of the parcel at sea level is 76.5 F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5 F/1000' and

31. English

What is the difference between antimetabole and chiasmus?

32. Physics

im trying to study for my exam by doing problems, however im stuck with this one. any help is appreciated In doing a load of clothes, a clothes drier uses 16 A of current at 240 V for 59 min. A personal computer, in contrast, uses 2.3 A of current at 120

33. math

The sum of the 3 angles of a triangle is 180 degrees. In triangle PQR, the largest angle is twice the size of the smallest angle. The remaining angle is 16 degrees larger than the smallest. Write and solve an equation to find the size of the smallest angle

34. Physic

Given that the distance between the Earth and the Moon is d = 3.84 􀀁 108 m, show that a satellite located exactly in-between the Earth and the Moon at a distance of 90% d from the Earth experiences no net force (at least when only the gravitational

35. math

on a map, the key indicates that 2.5 centimeters equals 10 miles. a road on the map runs for 30 centimeters. how long is the road?

36. Biochemistry

Give the sequence of a reverse primer used to insert a BamHI site (GGATCC) at the 3' end of the following sequence: 5' CTGAACGTCCAAGGCTTAA 3' 3' GACTTGCAGGTTCCGAATT 5' Make sure you indicate your primers polarity.

37. geometry

The altitude upon the hypotenuse of a right triangle divides the hypotnuse into segments of 3 and 12. find the length of the altitude

38. Math

Which scale will produce the smallest drawing? A) 1cm: 5m B) 1mm: 50m C) 5cm: 10m D) 10cm: 25m

39. Math

Of 1901 people who came into a blood bank to give blood, 315 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure

40. physics

a warehouse employee is pushing a 38 kg desk across a floor at a constant speed of 0.4 m/s. How much work must the employee do on the desk to change the speed of 1.5m/s?

41. Geometry

Given that the ratios of the perimeter of two similar shapes is 3/5, what is the ratio of their perimeters.

42. math

Anita and Maria went to the candy store. Maria bought 5 pieces of fudge and 3 pieces of bubble gum for a total of \$5.70. Anita bought 2 pieces of fudge and 10 pieces of bubble gum for a total of \$3.60. Determine the cost of 1 piece of bubble gum.

43. math

classify each statement as sometimes, always, or never true. give examples or properties to support your answer d+ (-d)=0

44. Physics

Starting from rest at 10m to the left of the origin (the starting line of a race), a go-kart undergoes constant acceleration of 2.46 m/s2. Make a table calculating the karts position and velocity at 10 second intervals from t=0 to 60 seconds. I have

45. math

Solve the following system using substitution. Write the solution as an ordered pair, (a, b). b = a – 4 2a – 3b = -2

46. Chemistry

A volume of 45.3mL of .719 M Ca(NO3)2 solution is mixed with 82.3mL of 1.409M Ca(NO3)2 solution calculate the concentration of the final solution

47. Algebra 1

slove (8w+2)(w+5)

48. MATH

9.3 X 10^-5

I need someone who is a scientist to help me on my reading project. This basically is about how king penguins are being threatened by global warming. If your a scientist it would help me a lot. I just need to interview you and find more about King Penguins

50. Math

A person has \$5 and \$10 bills. In total they have 26 bills that equal to \$210.

51. Algebra

Henry purchased x apples; Jack purchased 10 less than 1/3 of apples Henry purchsed

52. Math

Sue's Organic sells a 24-ounce jar of peanut butter that costs 5 less per ounce than their 16-ounce jar. What is the total price of their 24-ounce jar of peanut butter?

53. math

If Joe throws a pair of six-sided dice and records the sum of the first throw, how many more times must Joe throw the dice to ensure that he records the same sum as the first throw?

54. physics

A ball is thrown at a rate of 25m/s. The ball travels 138 meters. How long does it take the ball from start to end?

55. math

what question can i make with a picture that has 2 triangles,3 quadrilateral,and 4 pentagons?the answer is 38.

57. MATH

Addition of Polynomials (w^2 -2w+1) + (2w-5+w^2)

58. solar energy

If the price for Wp of a PV panel is €1 and the external costs are €400, and considering an efficiency of electricity to heat conversion of 85%, how much (in €) will it cost to cover 5805 W of energy with PV technology?

59. physics

A force is applied to a 3 kg mass and produces 5 m/s 2 acceleration. What acceleration would be produced by the same force applied to a 12.2 kg mass? Answer in units of m/s 2 .

60. math

Find all numbers that are not in the domain of the function. Then give the domain using set notation? F(x)=________17over xSquare+4x-12

61. Algebra

Maria and Charlie can deliver 50 papers in 2 hours. How long would it take them to deliver 35 papers? formula please

11/16-12/16

63. physics

a40w motor conectedto a 9v battery can lift an object 40m in 10s

64. College Algebra

The parking lot is 25 by 40 feet. The owner wants to enlage the parking lot by paving an equal width strip on the north side and east side of the lot, sot hat the new lot will be twice the area of the old one. Find the equation which has as a root the

65. MATH

A name tag is 6.7 centimeters long. How many meters long is it

66. math

i need help here is the question. Leena bought 93 yards of wire. How many of wire did she buy

67. Physics

1) An 8.5kg bowling ball dropped 11m hits the ground 1.5 seconds later. What is the magnitude of the force acting on the ball during the fall? 2) Shuttle astronauts climb at a rate of 24.5m/s^2 shortly after takeoff. What apparent weight would a 95kg

68. English

Write your own journal entry from the perspective of a member of Bradford's colony. What do you think of these unruly pirates? What shocks you the most about these surly characters? How do the manners of the pirates differ from yours? Visit the Calvinism

69. Algebra

factor the expression x(a+2) - 2(a+2) i missed this day because i was sick...please explain!

70. Microbio

Please write a one paragraph abstract arguing for or against one of the following statements: Hormone replacement therapy is carcinogenic Water fluoridation causes bone cancer Regulation of carcinogens should take hormesis into account Aneuploidy, not

71. Physics

Given that the distance between the Earth and the Moon is d = 3.84 x 10^8 m, show that a satellite located exactly in-between the Earth and the Moon at a distance of 90% d from the Earth experiences no net force (at least when only the gravitational force

72. MATH

9.3 X 10^-5 This is a question...

73. Social Studies

What was the substance used to stuff in the mummy's nostrils?

74. science

Which of Newton’s laws says that a net force acting on an object causes the object to accelerate in the direction of the force?

1. Math

77

posted on June 5, 2018
2. Science

Sorry for my spelling, rushed it.

posted on May 11, 2018
3. Chemistry

Still have no clue what goes where!

posted on April 3, 2018
4. Chemsitry

Yes, really didn't know how to set it up.

posted on April 2, 2018
5. geometry

non-of the above only Call of duty black ops 4 is coming out on September 2 2018.

posted on March 23, 2018
6. American government

YESMAN is the fu**ing man

posted on April 5, 2017
7. math

Yuron is sketching a scale drawing of a famous painting. The painting is 54 inches wide and 72 inches long. He used a scale factor of 2/3 to make his sketch. How many inches wide is Yuron’s sketch?

posted on February 17, 2017
8. Physics

posted on December 30, 2016
9. Spanish 2

Les

posted on November 16, 2016
10. chemistry

idk

posted on November 14, 2016
11. science

b

posted on September 21, 2016
12. chemistry

64

posted on September 2, 2016
13. Chemistry

1.3 x 10^22

posted on July 13, 2016

Write the longest multiplication combination you found for each of these numbers

posted on April 27, 2016
15. Math

5400

posted on March 22, 2016
16. chemistry

How many grams of HCL are required to produce 224 liters of CL2at stp

posted on March 1, 2016
17. Differentials (calc)

Hello, everybody let's get started

posted on December 7, 2015
18. Social Studies

..

posted on September 29, 2015
19. Geometry

Idk Idk idk

posted on September 17, 2015
20. math

0=240

posted on August 20, 2015
21. Calculs I

780000

posted on November 2, 2014
22. Physics

The answer is B because, in reality, the force of gravity on astronauts, just depends on their masses which do not change, though the spacecraft is subjected to an acceleration upward. Due to the acceleration of the spacecraft, is exerted on the astronaut

posted on July 2, 2014
23. common factors

you forgot to put the answer for 24/84

posted on March 15, 2014
24. common factors

18/36=2/6,5/7

posted on March 15, 2014
25. math

well nevermind ._.

posted on June 20, 2013
26. math

The range is basically all the values that can come out from plugging something in (in other words, every answer that the equation can have). In order to find the range, you need to graph this equation. Once you have the graph, find which point the

posted on June 20, 2013