1. chemistry

Write the balanced molecular, complete ionic, and net ionic equations for the following reactions in aqueous solution: a. magnesium chloride reacts with potassium carbonate b. sulfuric acid reacts with sodium hydroxide

2. ALGEBRA 2

WHAT IS THE RIDDLE TO ALGEBRA WITH PIZZAZZ WORK SHEET 56??

3. Physics

A sled is being held at rest on a slope that makes an angle (theta) with the horizontal. After the sled is released, it slides a distance (d1) down the slope and then covers the distance (d2) along the horizontal terrain before stopping. Find the

4. calculus

At noon, ship A is 110 km west of ship B. Ship A is sailing east at 25 km/h and ship B is sailing north at 15 km/h. How fast is the distance between the ships changing at 4:00 PM?

5. Physics

Two equal charges are separated by 3.7 x 10^-10 m. The force between the charges has a magnitude of 2.37 x 10^-3 N. What is the magnitude of q on the charges? can some one explain to me how to do this step by step. Not that great at math hope you can help.

6. Chemistry

Acetylene gas, C2H2, is used for welding. A 5-liter supply of acetylene being stored at -23ºC, exerts a pressure of 5 atm. At what temperature would the same number of moles of acetylene, moved to a 10-liter container, produce a pressure of 2 atm?

7. CHEMISTRY

What coefficients are needed to balance the equation for the complete combustion of methane? Enter the coefficients in the order CH4,O2,CO2, and H2O,respectively. Express your answer as four integers, separated by commas (e.g., 1,2,3,4).

8. Physics

five hundred kcal of heat is added to 2-kg of water at 80 degree Celsius. how much steam is produced?

9. geometry

in the diagram below of triangle abc, de is a midsegment of triangle abc, de=7, ab=10, and bc=13.find the perimeter

10. Physics

Suppose two boxes on a frictionless table are connected by a heavy cord of mass 1.0 kg. Calculate the acceleration (magnitude) of each box and the tension (magnitude) at each end of the cored, using the free-body diagrams shown in Figure 4-53. Assume FP =

11. Physics

what is the moment of interia of a solid cylinder of radius R=0.0950m thickness t=0.015m total mass M=3.565kg? show your work

12. Math

(1) Attack of the 50ft Turnip plays at 7:10. It is now quarter to seven. How long before the movie starts? (2) It takes 30 minutes to drive to the movie theater. They Saved Frankenstein's Lunch begins playing at ten after 1. What is the latest you can

13. math

A ball is thrown from the edge of a cliff with an initial velocity of 60·m/s upward. Answer the following questions using + (upward) and - (downward) to indicate the direction of the velocity. Ignore air resistance and assume the ball does not hit the

14. chemistry

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400 mL of a solution that has a concentration of Na+ ions of 1.00 M?

15. statistics

A telemarketing supervisor tells a new worker that the odds of making a sale on a single call are 4 to 15. What is the probability of a successful call? (Enter your answer to 2 decimal places.)

1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed

17. science

spent steam from an electric generating plant leaves the turbines at 120.0 C and is cooled to 90. 0 C liquid water by water from a cooling tower in a heat exchanger. How much heat is removed by the cooling tower water for each kg of spent steam?

18. Math

the height of a rocket above the ground is modelled by the quadratic function h(t)=-4t^2+32t a) how long will the rocket be in the air ? how do you know? b) what is the maximum height that the rocket will reach ?

19. Chem

1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed

20. Physics

The critical angle for a transparent material in air is 30 degrees. The index of refraction of the material is most nearly A) 0.33 B) 0.50 D) 1.5 E) 2.0

21. Algebra

A jet leaves the Charlotte, North Carolina, airport traveling at an average rate of 564 km/h. Another jet leaves the airport one half hour later traveling at 744km/h in the same direction. Use an equation to find how long the second jet will take to

22. physics

A race car enters a flat 200 m radius curve at a speed of 20 m/swhile increasing its speed at a constant 2 m/s2. If thecoefficient of static friction is .700, what will the speed of thecar be when the car beings to slide?

23. chemistry

The laboratory technician accidentally mixed NaHCO3 with BaCl2*2H2O instead of KCl when preparing unknown mixtures for this experiment. How would this mistake affect the calculated percentage of NaHCO3 in the mixture? Justify your answer with an

24. using an expanded algorithm

How do I use an array to find partial products for 4x36?

25. English

Which of the following are characteristics of allegory? A. Immitation B. Humor C. Didacticism D. Spiral Plot C. Music

26. Chemistry

What mass of NaCl is needed to precipitate all the silver ions from 20.0 mL of 0.100 M AgNO3 solution?

27. Physics

A car drives up a straight hill at a constant speed of 60 kilometers per hour. A truck drives over the crest of the hill at a constant speed of 60 miles per hour. What is the net force on the car and on the truck? 1. both not zero 2. not zero; zero 3. both

28. Chemistry

Convert a pressure of 23.8 in. Hg into kilopascal. Ok so I looked up kilopascal and it Said 1 Kpa = 1000 pa So I began to set it up like this 23.8 / 29.2 x1000 am I correct Chemistry - DrBob222, Thursday, October 13, 2011 at 1:48pm I don't think that will

29. Physics

five hundred kcal of heat is added to 2-kg of water at 80⁰C. how much steam is produced?

30. math

A basket contains 11 pieces of fruit: 4 apples, 5 oranges, and 2 bananas. Jonas takes a piece of fruit at random from the basket, and then Beth takes a piece at random. What is the probability that Jonas will get an orange and Beth will get an apple?

31. calculus

a large ferris wheel is 100 feet in diameter and rises 10 feet off the ground. each revolution of the wheel takes 30 seconds. A) express the vertical distance "H" of the seat off the ground as a function of time "t" if t=0 corresponds to a time when the

32. physics

five hundred kcal of heat is added to 2-kg of water at 80⁰C. how much steam is produced?

33. Chemistry

As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0 L. What was the initial volume of the system if the

34. physics

you are driving a 2520.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides

35. social studies

Carrie is being held by her father. She is smiling at him one minute and then, unexpectedly, she slaps his face. This is a sign of which type of attachment? A) insecure-avoidant B) disorganized C) secure-detached D) ambivalent

36. Physics (2)

If it takes 4.00 J of work to stretch a Hooke's Law spring 10.0 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm

37. chemistry 12

Calculate [H3O+] and [OH-] in 0.22M KOH(aq)

38. chemistry

A solution of 11.7 g of fructose in 325 g of ethanol has a boiling point of 78.59 C. The boiling point of ethanol is 78.34 C and kb for ethanol is 1.2 C/m. What is the molecular weight of fructose?

39. Physics

A ball is thrown horizontally from the roof of a building 55 m tall and lands 50 m from the base. What was the ball's initial speed?

40. Physics

A box of books weighing 303 N moves with a constant velocity across the floor when it is pushed with a force of 400 N exerted down-ward at an angle of 38.6 degrees below the horizontal. Find ìk between the box and the floor. Well I know that I have to use

41. English

Could you please check the word choice? Thank you very much. 1) Mary admits that she has always fancied Ian. Ian started chatting her up at Jessie's party. However, another girl turned up and Ian had a row with her. 2) At first, Mary didn't realize that

The maximum wavelength of light emitted from a blackbody that will emit electrons from a given piece of metal is 255nm. What is the fraction of total energy emitted from the black body that emits electrons? I set up the integral:

43. chemistry 12

Identify the two conjugate acid-base pairs in each of the following. a.) H2PO4-(aq)+HSO4-(aq) H2PO4(aq)+ SO4^-2(aq) b.) HI(aq)+ CN-(aq)HCN-(aq)+ I-(aq)

44. physics

suppose an experimental arrangement like the one in part 2 has mass m1= 0.200kg at the 0.100m mark and a mass m2=0.100 kg at 0.750m mark. Can the system be put in equilibrium by a 0.050kg mass? if it can not be done state where it would be placed. If it

45. calculus

A trough is 16 ft long and its ends have the shape of isosceles triangles that are 5 ft across at the top and have a height of 1 ft. If the trough is being filled with water at a rate of 11 ft3/min, how fast is the water level rising when the water is 7

46. Math

Round 50.4 square miles to the nearest Square mile

47. chemistry 12

sketch a ph curve for the titration 40.00 mLof 0.100M hyrazine H2NNH2(aq) having a Kb of 3.0 x 10^-6 by 0.100 M HCIO4(aq)

48. Geography

Following the breakup of the Soviet Union, what are some of the major problems faced by many of the new countries? Thanks.

49. Calculus

Use linear approximation to estimate the amount of paint in cubic centimeters needed to apply a coat of paint cm thick to a hemispherical dome with a diameter of meters

50. Confused

Somebody at my school said that Jiskha homework help blocked them from posting answers for no reason. That person is a big bully and I don't believe him. Is that true? Why would that happen...? Confused... Hello Kitty :-)

51. World History

The world's oldest recognized monarchy is found in _____. a. Kush b. Egypt c. Nubia

52. chemistry 12

Calculate [H3O^-] in a 0.15M solution of benzoic acid, HC7H5O2(aq) having a Ka of 6.4 x 10^-5 I got. 6.4x10^-5=(x)(x)/0.15 6.4x10^-5= x^2/0.15 6.4x10^-5 x 0.15 = x^2 square root of 9.6x10^-6 = square root of x^2 x= 0.003098 The pH solution is -log

53. CHEMISTRY

What mass of water is produced from the complete combustion of 2.60×10−3 of methane? Express your answer with the appropriate units.

54. Algebra

Using each of the following scales, find the dimensions in a blueprint of an 8ft-by-12ft room. 1. 1 in.:2ft 2. 1 in.:4ft

55. Algebra

The sum of two consecutive even integers is 118. A. Define a variable for the smaller integer. B. What must you add to an even integer to get the next greater even integer? C. Write an expression for the second integer. D. Write and solve an equation to

56. MATH

1) Attack of the 50ft Turnip plays at 7:10. It is now quarter to seven. How long before the movie starts? (2) It takes 30 minutes to drive to the movie theater. They Saved Frankenstein's Lunch begins playing at ten after 1. What is the latest you can leave

57. chemistry

The density of dry air measured at 25 degrees celsius is 1.19 x 10 to the negative 3 g/cm cubed. What is the volume of 50.0g of air?

58. Physics

A missile is shot straight up into the air. At the peak of its trajectory, it breaks up into three pieces of equal mass, all of which move horizontally away from the point of the explosion. one piece travels in a horizontal direction of 28degrees east of

59. physics(Quick!)

if a car accelerates from rest at a constant 5.5 m/s^2, how long will it take for the car to reach a velocity of 28 m/s

60. Chemmistry gas laws

CH2==Ch2(g) ----> CH4(g) + C (graphite) If the decomposition begina at 10 degrees C and 50.0 atm with a gas density of 0.215 g/mL and the temperature increases by 950K, what is the final pressure of the confined gas (ignore the volume of graphite and use

61. statistics

A telemarketing supervisor tells a new worker that the odds of making a sale on a single call are 4 to 15. What is the probability of a successful call? (Enter your answer to 2 decimal places.)

62. Chemistry

In one experiment, the mass of water is 92.6 grams, the initial temperature of the water is 67.6oC, the mass of liquid nitrogen added to the water is 61.4 grams, and the final temperature of the water, after the liquid nitrogen has vaporized, is 35.6oC.

63. canyons,dunes,and deltas SCIENCE

What are some interesting facts about dunes,canyons,and deltas?

64. Chemistry

A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 625 of a solution that has a concentration of ions of 0.800

65. Possessive nouns

I'm stuck on to stupid questions tell me the answer ok worry haunted the refugee ____ eyes a.childrens b children's c.childrens' or d.childrens's not d for sure

66. algebra 1b

Use the table below to find the products of the two polynomials. Enter your answer in descending order in the box below. Enter exponents using the caret ( ^ ). For example, you would enter as 4x^2. Do not enter spaces in your answer. (x3 + 2x2 - 2)(x3 - 3x

what wil be the next number pattern 1, 2, 4, 8, 16, ? Thanks!

68. Physics

The tallest volcano in the solar system is the 29 km tall Martian volcano, Olympus Mons. An astronaut drops a ball off the rim of the crater and that the free fall acceleration of the ball remains constant throughout the ball’s 29 km fall at a value of

69. physics

A cart loaded with bricks has a total mass of 13.5 kg and is pulled at constant speed by a rope.The rope is inclined at 27.9 degrees above the horizontal and the cart moves 13mts on a horizontal floor.The co efficient of kinetic friction between ground and

70. math

the width of a square-based storage tank is 3m less than its height. The tank has a capacity of 20m^3. If the dimensions are integer values in metres, what are they?

71. Correct grammar

Pick the correct answer which corrects the underlined portion of the following sentences in the simplest way possible – for grammar and/or style, without changing the basic meaning of each sentence. In the evening you can go to a restaurant and order a

72. Math ( any help would be great!)

a ball is kicked in the air from the top of a cliff , the path that the ball travels is given by the equation h(t)=-5t^2+17t+22, where h(t) is the height given in meters and t is the time seconds. a) how high is the cliff ? b)what is the maximum height the

73. chemistry

Determine the mass of KHP (molar mas = 204.2 g/mol) that is required to react with 30.0 mL of 1.0 M Na0H (molar mass 40.0 g/mol)if the reaction is NaOH + KHP --> NaKP + H2O

74. Functions

What is the purpose of division of polynomials?

75. algebra w o r d Problem

1) the seventh grade class has been collecting aluminum cans for recycling. the class has collected 210 cans. their goal is to collect 520 cans. write an equation and estimate the number aluminum cans needed to reach their goal. i got this: c + 210 = 520:

76. English

I'm posting you the part of the song I didn't include before. 1) I knew I shouldn't have left the appartement /I knew I should've stayed in watching TV/ If I'd looked at the moon and looked at my stars /I wouldn't be in this mess I'm in right now I

77. Chemistry

FeS2 (s) + O2(g) -----> SO2(g) +Fe203(s) (unbalanced) a production error leads to the sulfide being placed in a 950-L vessel with insufficient oxygen. Initially, the partial pressure of O2 is 0.64 atm, and the total pressure is 1.05 atm, with the balance

78. identify sentences

1. Reading is essential for becoming a savvy member of one's community, and writing is essential for expressing one's viewpoint effectively in that community. A. Compound sentence. B. parallel compound sentences. C. 3 point topic sentence, with good

79. chemistry

What mass of carbon dioxide is produced from the complete combustion of 2.60×10−3 of methane?

80. Literature POETRY, PART 1

Which one of the following lines best illustrates personification? A. A narrow wind complains all day. B. The fog comes on little cat feet. C. She floated graceful as a dove. D. Spring is a dream unsung.

81. Physics

What equation is the rotational equilvalent of newton's law ? give the meaning of each symbol and state which rotational quantites are analogous to which linear quantities.

82. chemistry

For a week acid whose ionization constant is 1.75 x 10(-5), the pH of its solution is 3.0. Determine its degree of ionization and its percent ionization.

83. statistics

What is the standard deviation of a normal distribution, whose mean is 35, in which an x-value of 23 has a z-score of -1.63?

84. physics

Two boxes of masses 21.6 kg and 28.2 kg sit on a smooth, frictionless surface. The boxes are in contact, and a horizontal force of 68.2 pushes horizontally against the smaller box. What is the acceleration of the two boxes?

85. english help!!! Correcting Grammar

1. Of the four sentence types and purposes, the sentence type and purpose used most often in expository writing is: a. Simple b. Compound c. Complex d. Compound/Complex 2. Each of the committee members is expect to be there on time. Answer a. noun b.

86. English Help!!! Correcting Grammar

Choose the word in the following sentences that is grammatically incorrect: 1. Lisa enjoys meeting men who are very intelligent and real refined, but not too egotistical. Answer a. enjoys b. very c. real d. too e. egotistical IDENTIFY BELOW! 2. My lady and

87. physics

Suppose that the coefficient of friction between your feet and the floor, while wearing socks, is 0.250. Knowing this, you decide to get a running start and then slide across the floor.

88. chemistry 12

Is HOCl(aq) a polyprotic acid? Explain

119. ENGLISH HELP!!! Correcting Grammar

What is the main verb in the following sentence? 1. This building, the largest on campus, houses most of the administration offices. a. building b. campus c. houses d. there is no main verb 2. My lady and I are taking a long walk through the park this

120. Calculus

Find the equation (in terms of x and y) of the tangent line to the curve r=3sin3(theta) at theta=pi/4. I don't know if I'm taking the right approach for this question but her goes what I did: I found the slope I got

121. Physics

Suppose the force of friction on a sliding object is 25 N. What is the force needed to maintain a constant velocity?

122. physics

In an 8.00 {\rm km} race, one runner runs at a steady 12.0 {\rm km}/{\rm h} and another runs at 14.0 {\rm km}/{\rm h}.

123. chemistry 12

If the pH of a solution is 3.5, what colour will be shown by each of the following indicators in the solution? a)Methyl Violet b) methyl red c) Methyl orange d) phenolphthalein My answers: a) Yellow to Blue b) Red to Yellow c) Red to Yellow d) close to a

124. Physics

A Cessna 150 aircraft has a lift-oﬀ speed of approximately 125 km/h. What minimum constant acceleration does this require if the aircraft is to be airborne after a take-oﬀ run of 172 m? Answer in units of m/s2 What is the corresponding take-oﬀ time?

125. math

The number 34,459,425 is the product of several consecutive positive odd numbers. What is the greatest of these numbers?

126. Physics

A roller coaster moves 4.2 m horizontally, then travels 6.9 m at an angle of 30º above the horizontal. What is the resultant displacement from its starting point?

127. spanish

How do you say 5:20,10:45,1:15,7:30,6:42 all in spanish

128. math

The equation C = 500 + 50x describes the total cost of a wedding reception, where C is the total cost and x is the number of guests. What is the total cost for 125 guests?

129. math

for what value of m, x4+4x2+m+8/x2+4/x4 is a complete square where x is not equal to 0

130. math

the distance between two barangay is 2-3/4 kilometers how meter is the distance

131. writing

what is an example of a strong and solid thesis statement concerning the choice of televisions shows as one matures.

132. Chemistry

Convert a pressure of 23.8 in. Hg into kilopascal. Ok so I looked up kilopascal and it Said 1 Kpa = 1000 pa So I began to set it up like this 23.8 / 29.2 x1000 am I correct

133. PROBLEM SOLVING IN MATHEMATICS

the average age of a group of teachers and student is 20. the average age of the teachers is 35. the average age of the students is 15. what is the ratio number of teacher to number of students ?

134. Organic Chemistry

You have been hired by a large food company to develop a method to prepare decaffeinated coffee, suggest a simple procedure that you might use for this? (in regards to extraction)

135. psychology

How do the ideas of positive psychology differ from the traditional model of illness?

136. physics1

A bus that is traveling at 30.0 km/h speeds up at a constant rate of 3.5 m/s^2. what velocity does it reach 6.8 seconds later?

137. geometry

If = 5 centimeters, and = centimeters, what is the length of line segment

138. physics

Only two forces act on an object (mass = 4.20 kg), as in the drawing. (F = 73.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object. magnitude m/s2 direction ° counterclockwise from the +x axis The angle from

139. chemistry

A cube of gold has a side length .050m. The mass of the cube is 2.40kg. What is the density of gold in g/cm cubed?

140. Math

In the question I am working on, there are three jars filled with balls, and a die. Depending on the number that comes up from the die determines which jar a ball is drawn from. I created a tree and have all my individual probabilities. The question asks

141. algebra

the weight of an object varies inversely as the square of its distance from the center of the planet it is on. If a person weighs 180 pounds on a planet's surface, what is his weight 250 miles above the surface of the planet? The planet's radius is 7000

Give an example of a linear situation with a rate of a change that is i. positive ii. zero(no change) iii. negative write an equation that represents each situation in the part above. I don't get this so please help! Thank you!

what might one do to verify that the global strain energy minimum has been identified for a compound?

144. Statistics

A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $500 of the true mean. The clinic estimates that the true population standard deviation is around$2,300. If the confidence level is 95%,

145. physics

A driver in a car traveling at a speed of 79 km/h sees a cat 107 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 103 m? Answer in units of s

146. chemistry

how many grams of propane do you need to combust 525 kJ of heat

147. Factor

How do i factor 16w^6-2q^6

148. Calculus

Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis around the x-axis. What I did was: V=ç(0,1)pi(1-x^3)^2 dx v=pi(x^7/7-x^4/2+x) and I evaluated it for one since 0 is just going to be 0. and I got 9pi/14

a car starts and accelerates uniformly at a rate of 2.0 m / s ^ 2 in 6.0 s. Then, it maintains its constant speed for 30 seconds. Finally, the shrinkage slows down uniformly and stops to 5.0 s. find the total distance traveled by the car.

150. English

1. If they failed to light the lanterns, they were fined heavily. 2. If they failed to light the lanterns, they would be fined heavily. (Would you explain the difference between #1 and #2? Thank you. Have a good time.)

151. chemistry

Calculate the molarity of NaI in a soultion obtained by adding 5.0 mL of 0.2 M NaI to a mixture of 5.0 mL of 0.2 M K2SO4,5.0 mL K2S2O8, 4.0 mL of H2O and 1.0 mL of Starch

152. pre-calculus

$100,000 is divided into two investments with annual returns of 4% and 7.5%. find the amount invested at the lower rate if the total income at the end of the year is$5050?

153. English

I just need to know if the sentences are correct though they are not complete. Thank you. 1) Imagine a school in which both German, French, English are studied... The school has got 130 students,45 of whom study only English whereas ..... study both

154. Statistics

in a typical year, about 46,000 deaths result from car accidents. How manyu deaths would result from car accidents in a typical 4 day period?

155. Algebra

Two rectangles are similar. The first is 4in. wide and 15in. long. The second is 9in. wide. Find the length of the second rectangle.

156. Probability

The random variable is uniform in the (-2c,2c)interval . Find and sketch F(y) and f(y) if Y=X^2

157. Chemistry

Balancing chemistry equations and need help! Thank You!? Help balancing any of the following equations: Cl2+Na Br----> NaCl2 + Br Na+LiOH---->

9n=81

159. geometry

what is the length of CE if DC=5x-24, CE= 6x-20, and DE= 55?

One zero of f(x)=x^3+4x^2+x+c is -3. a) calculate the value of c. b)calculate the other zeros.

161. accounting

Do you really think a company would offer a free gift to understate sales? It may avoid paying tax, but it is then giving away inventory. Do you think that is wise?

162. Algebra

The area of a triangle is 2x^2+5x+3. The height is 4x+6. Determine the base of the triangle.

write 100 and 72 as products of two powers

164. math

the additional month of interest (note that the problem specifies 2% simple interest per month)? As a professional photographer, Marion has seen the trend away from film cameras as customers purchase low-end digital cameras and printers in order to avoid

165. Math

How is scientific notation used in our daily lives?

166. Party

Around how many liters/cans soda should a school club buy for a Halloween party of around 200-300 guests?

167. trig

evaluate cos 12*pi

168. physics

A space vehicle is coasting at a constant velocity of 20.7 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.260 m/s2 in the +x direction. After

169. Physics

find the electrostatic potential, and then the electric field a distance z above the centre of a circular loop of radius r, which carries a uniform line charge (lamda)

170. Chemistry

Ionic bonds and covalent bonds: Ionic Bond(s) for: K&S -> K2S N&Be -> Be3N2 Al&P -> AlP Covalent Bond(s) for: C&F -> CF4 S&O -> OS Cl&Se -> SeCl4

171. Algebra

A.Write and solve an equation to find three consecutive integers with a sum of 126. Let n= the first integer. B. In part A, could you solve the problem by letting n= the middle integer,n-1= the smallest integer, and n+1= the largest integer?

172. Algebra

A.Write and solve an equation to find three consecutive integers with a sum of 126. Let n= the first integer. B. In part A, could you solve the problem by letting n= the middle integer,n-1= the smallest integer, and n+1= the largest integer?

173. grammar

Where does apostraphe go on days in the sentence. Soldiers carried several days cold rations.

174. Calculus (derivatives)

find the slopes at the indicated points y = 3 + 5x - 3x^3 (0,3), (1/2, 41/8), (2,-11)

175. algebra

solve for x and y in the following system of equations. y=3x^2+8x-10 & y=x^2+7x+5 how do you do this ?

176. early childhood

according to Leeds, at snack time, childen should be given ______ of each food for each year of their lives.

177. Chemistry 151

finding full formula of a compound knowing that it is a hydtrated sulfate salt of an alkali metal

178. Physics

Which of the following involves a non-zero net force? I. A hockey-puck sliding at a constant speed on ice. II. The earth revolving around the sun at a constant speed. III. An object falling near the surface of the earth. A) I only B) III only C) Both I and

179. Algebra 2

What is the vertex of the graph of y = |x + 3|?

180. calculus

If X = 15, Y = 20, and Z = 25, what is the sine of angle B?

181. Algebra 1

Hello! :-) Can some please explain to me or provide a website that has information about graphs and how to use them? Thanks! Hello Kitty!

182. precalcus

a positive angle less than 2 pi their is a coterminal 17 pi/4

183. Calculus

Suppose g(x) = { 1 / (x - 2) if x < 1 2x - 4 if x >/= 1 The best description concerning the continuity of g(x) is that the function A.) is continuous B.) has a jump discontinuity C.) has an infinite discontinuity D.) has a removable discontinuity E.) None

184. chemistry

why is the energy difference for t-butylcyclohexane significantly greater than the corresponding value calculated for methylcyclohexane?

185. Calculus

Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis and whose cross-sections perpendicular to the y axis are equilateral triangles. I asked this same question for the y-axis around the x-axis (Thanks for the

186. English grammar check

Choose the correct answer which corrects the following sentences without changing its meaning 1. I want to get a well-paying job. Which is why I am attending college. a. I want to get a well-paying job. Which is why I am attending college. b. I want to get

187. calculus

lim x-0 xtan(8x)+ 2tan(8x)/(x^2+4x)

188. Math

I'm helping my daughter with Algebra homework and I've forgotten how to solve the following. x/2-12 = -3 + x Can someone help

189. Statistics

An auditor wants to estimate what proportion of a bank’s commercial loan files are incomplete. The auditor wants to be within 10% of the true proportion when using a 95% confidence level. How many files must the auditor sample? No estimate of the

190. Calculus

Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis and whose cross-sections perpendicular to the y axis are equilateral triangles. I asked this same question for the y-axis around the x-axis (Thanks for the

191. Calculus (Any Help At All Is Really Appreciated)

Suppose g(x) = { 1 / (x-2) if x < 1 2x - 3 if x >/= 1 The best description concerning the continuity of g(x) is that the function A.) is continuous B.) has a jump discontuity C.) has an infinite discontuity D.) has a removable discontuity E.) None of the

192. Calculus

A 23 foot ladder is leaning on a 6 foot fence. The base of the ladder is being pulled away from the fence at the rate of 7 feet/minute. How fast is the top of the ladder approaching the ground when the base is 6 from the fence? [Note: The ladder is

193. Geometry

Line RS is bisected at T. If line RT = 4x + 29 and TS= x + 17, what is the length of line RS

194. chemistry

how many mL of 5% BaCl2 X(multiplied) 2H2O are needed for 0.3500g pure sodium sulfate?

195. chemistry

Explain very clearly why a mole of hydrogen chloride depresses the freezing point of 1.0kg of water by almost twice as much as a mole of ethanol.

196. Chemistry

1. In an equilibrium, A + B ---> C + D; "A" & "B" are mixed in a vessel at temperature "T". The initial concentration of "A" was twice the initial concentration of "B", & after the equilibrium has reached, concentration of "C" was twice the equilibrium

197. Geometry

What is the measure of angle LJI if the measure of angle IJK = 7x - 3, the measure of LJI =10x + 4 and the measure of angle KJL=28?

198. Math

If you jog for half an hour everyday for nine days. Write an improper fraction that shows the total number of hours you jogged.

200. Social Studies 30

Which characteristic(s) of collectivism do you think are most important to Canadian society? Competition, cooperation, private property, rule of law, common good, self-interest, economic equality, collective norms, freedom, collective interest, individual

201. Factors

Factor by grouping X^3+3X^2-5x-15 I get x^2(x+3)-5(x+3) is this correct????

202. English

1. A lantern man would take them to any places in Paris. 2. A lantern man used to take them to any places in Paris. 3. A lantern man took them to any places in Paris. (What is the difference among the three sentences?)

203. Physics

A ball thrown horizontally at 22.3 m/s from the roof of a building lands 31.0 m from the base of the building. How high is the building?

204. Linguistic - Japanese

What are the sentence structure rules for the Japanese language? I know you have the sentence -> (noun phrase) (verb phrase)

205. pre-calculus

$100,000 is divided into two investments with annual returns of 4% and 7.5%. find the amount invested at the lower rate if the total income at the end of the year is$5050?

206. Language Arts

In the sentence....They have done nothing wrong. I know "have done" is part of the verb phrase but not sure if "wrong" is part of the verb phrase too. Would "wrong" be included in the verb phrase?

207. social studies

what is the landmarks of newjersey?

210. Math

1) Find the solution to the following system of two linear equations, if it has a solution. 2x-y=3, -x+y=1 2Find the solution to the following system of two linear equations, if it has a solution. 2x+y=4, x+3/2y=3

211. chemistry

What mass of CO2, a greenhouse gas, is produced per liter of each fuel (assuming complete combustion) I got this data density of ethanol = 0.785 g/mL density of octane = 0.699 g/mL Ethanol) C2 H5 OH + 2O2 -> 2CO2 + 3H2O delta H combustion ethanol = -1234.8

212. Language Arts

If you said....They have been fed today. Would the verb phrase be "have been fed"?

213. pre algebra

how do i figure out how to write a number setence for the product on the number line -10 -8 -6 -4 -2 0 2

214. math

marco wants to use a single scoop to measure both flour and liquid for making coffee cake. In whole ounces, what is the largest scoop size he can use to make the cake?

215. statistics

If the city spends \$145000 on promotional expenditures, what will be the projected attendance @ 95% confidence level?

216. Algebra

I have 37 coins, nickels dimes, quarters that equal 5.50 . I have 4 more quarters than dimes . How many nickels do I have?

217. Calculus

Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis around the x-axis. What I did was: V=ç(0,1)pi(1-x^3)^2 dx v=pi(x^7/7-x^4/2+x) and I evaluated it for one since 0 is just going to be 0. and I got 9pi/14

218. chemistry

Very carefully, but breifly discuss, with specific example, Le Chatelier Principle and its relationship to common ion effect.

219. science

what's the difference between dominant and recessive allele?

220. English

Can you please check these sentences for me? Thank you. 1) The dark-skinned girl in the picture is talking to a friend of hers on the phone. She's telling her that she was at Jessie's party (last)the previous Saturday. 2) She admits she has always fancied

221. math

kala's both is 12.25 feet long. What is the length of her boat in inches?

222. social studies

the group of the same as subordinate group.A defining feature of this group is that its members have less control or power over their lives than do members of dominant groups.

223. MATh (distance)

Kesha dove from Buffalo to Syracuse at an average rate of 48miles per hour. On the return trip along the same road she was able to travel at an average rate of 60 miles per hour.The trip from Buffalo to Syracuse took one- half hour longer than the return

224. English

Can you guys proof read part of an essay im writing. I know you do not know the context but, im just talking about the grammar issue. here it is: Along with the tension that goes on between Mr. And Mrs. Bennet, Charlotte and Mr. Collin’s marriage is not

225. School drop out

How to write research?

226. Algebra

In solving the equation (x + 3)(x + 1) = 48, Eric stated that the solution would be x + 3 = 48 => x = 45 or (x + 1) = 48 => x = 47 However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please

227. math

the number of 5th grade students in a school is a prime number greater than 50.What is the least number of 5th grade students there could be in a school

228. us history

what is another word for nativism

229. Geometry

2. This cone bottom tank is the perfect solution for transporting chemicals such as pesticides around to various locations. The cone shape of this plastic tank equips it not only for easy draining of materials, but also provides an easy cleaning process.

230. physics1

A bus that is traveling at 30.0 km/h speeds up at a constant rate of 3.5 m/s^2. what velocity does it reach 6.8 seconds later?

231. Hum186

What are some of the most influential and important games released to the general public within the last few years? Why are they important?

232. alg2/trig

Find the solution to the following system of two linear equations, if it has a solution. x+3y=4, 3x+9y=12

234. grammar

Where does apostraphe go in Polands when the sentence is Polands Jews fled from the German soldiers.

235. Calculus

Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis and whose cross-sections perpendicular to the y axis are equilateral triangles. I asked this same question for the y-axis around the x-axis (Thanks for the

236. Calculus (derivatives)

find an equation of the tangent line to the curve at the indicated point. y = -(x^1/3); (8, -2)

237. chemistry 12

The pH of a certain acid having a concentration of 0.20M was measured. The pH was 2.50. Was this a strong acid or weak acid?

238. Chemistry

What is the element oxidized and the element reduced in the equation: HAsO2 + 2 Ag+ + 2 H2O 2 Ag + H3AsO4 + 2 H+

239. geometry

Lines AB and CD are parallel. If the measure of Y equals 56°, what is the measure of Z?

240. English

Sorry. I would like you to help me rephrase 2) because I'm not sure about its meaning. Thank you.I included a sentence for you to check. 1) I knew I shouldn't have left the apartment /I knew I should've stayed in watching TV/ If I'd looked at the moon and

241. physics

Assume the mass of the object remains constant. If the Kinetic Energy of an object changes by 1/3, by what factor has its speed changed?

242. Physics

The braking distance of a car is 29m. If the speed of the car is increased by 45%, what is the car's new braking distance? Assume the acceleration of the car is constant and independent of its initial speed

243. ochem

is cis-1,2-dimethylcyclohexane a conformational isomer of trans-1,2-dimethylcycloehexane? Please explain.

244. Physics

two students are attempting to lift a sign to the top of a tall building, each is pulling equally with 100 newtons of force, on the two ropes. The ropes are attached to opposit corners of the sign, and the angle between them is 60. compute the resultant

245. childcare

A plant in the classroom appears to be wilting. The children are asked to come up with as many possible explanations for this as they can. They're engaged in the second stage of decision making, called A.group-think B.herding Ideas C.railroading ideas

246. math

In a soft ball gme, Archie getting hit is 1/4. the probability of betty getting hit is 1/4, and Veronica's probability is 1/2 for getting hit. if each goes to bat once, what is the probability that exactly one gets a hit

247. Stats

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25

249. physics

If a coordinate system is set up such that the positive x axis points in a direction 75° above the horizontal, what should be the angle between the x axis and the y axis?

250. art

This type of artwork can usually be found on buildings or other public property. (1 point) * scraffito * intaglio * graffiti * graphics

251. chemistry

Briefly discuss the effect of dissolving a solute such as KOH in a solvent such as water.

252. Math

If you jog for half an hour everyday for nine days. Write an improper fraction that shows the total number of hours you jogged.

253. ten commandmant

How do rules actually make us free? Like referring to the ten commandments, how do they allow us to be free instead of feeling as if we are living by rules and regulations

254. Philosophy

Write two types of philosophy?

255. physics

A 5 kg block is pulled along a horizontal frictionless floor by a string and exerts force of magnitude 16 N at an angle 30 degree.What is the magnitude of the acc of block?

256. comp

To avoid financial hardship during your golden retirement years, it is important not to depend on Social Security benefits. Is this a proper topic sentence, the subject is about Social Security being around in the future or not? Thank you!

258. Calculus

g(x)=(1)/(2e^(x)+4e^(-x))

259. Finite Math

A small seminar class consists of Anne, Bill, Cathy, Dan, Ellen, and Frank. The teacher has been told that 2 of them are from Indiana, 3 of them are from Michigan, and the other 1 is from Ohio. But the teacher does not know who is from which state. So the

260. English help on subjects

What is the subject in the sentences below? 1. Each person in this class has a desire to be successful. Answer a. each b. person c. class d. successful e. there is no subject in the sentence 2. The first assignment for this class is this quiz. Answer a.

261. math

500 students paid rete of £7.50 and the remainder paid the full adult rete of£10.what was the total amount of money paid to the cinema that night?

The polynomial 2x^3+px^2-x+6 has a remainder of zero when divided by x-2. Calculate p.

263. science

what happens when light strike a dark table?

264. Science

Are floods both constuctive and destructive?

265. math

for what value of m, x4+4x2+m+8/x2+4/x4 is a complete square where x is not equal to 0

266. Math Help

Subraction (1/6x^3-1/10x-1/5)-(-1/6x^3+1/10x-1/5)

267. math

how to find the x-interceps? x^4-29x^2+100?

268. math

what is its are of rectangular field is 94m long and 77m wide

269. johns

an example of a captivating and sophisticated introduction about choice of television shows as one matures including a solid thesis statement.

270. operating a car

Non-standard equipment and accessories added to the basic vehicle are generally called : A.options B.an extended warranty C.add-ons D.luxury items i got D

271. chemistry

Calculate the activation energy (in Joules) for a reaction whose rate constant doubles when the temperature is raised from 298 K to 500 K. Take R to be 8.314 J/K-mol.

272. physics

Suppose that the coefficient of friction between your feet and the floor, while wearing socks, is 0.250. Knowing this, you decide to get a running start and then slide across the floor. If your speed is 3.00 m/s when you start to slide, what distance d

273. Algebra

What is the standard form of the equation of the line passing through the point (-1,-2) and perpendicular to the line y= - 2/3x - 1? a. 3x-2y=-1 b.3x-2y=1 c.3x+2y=1 d.3x+2y=-1 I don't understand, can anyone help me please?

274. Social Studies

In 1979 who became the first woman to be honored on a circulating coin?

275. operating a car

1. The sticker price on a new car includes: A.The final selling price of the vehicle B.an extended warranty C.everything you need to know about the vehicle D.the retail price of everything that comes with that particular vehicles. i got B

276. English

Independent living and living at home How are they alike?

277. Math

How are z scores and the "empirical rule" related?

278. chemistry

what is 0.2505 to 3sf????

279. Algebra

Describe the steps you would use to solve consecutive integer problems.

280. social studies

what is the declaration of independence? P.S i only need the basic meaning thanks a bunch

281. maths

0.2505 to 3sf

282. Physics (3)

The mass m=1.00 kg is set up as a pendulum of length 0.6m . Initially in the position of h=0.2 m above the lowest point, and the pendulum is given initial speed of 1.00 m/s. What is the largest mass M that could be temporarily lifted in such setup?

283. Calculus

Suppose g(x) = { 1 / (x-2) if x < 1 2x - 3 if x >/= 1 The best description concerning the continuity of g(x) is that the function A.) is continuous B.) has a jump discontuity C.) has an infinite discontuity D.) has a removable discontuity E.) None of the

284. Calculus

Find all points on the curve where the tangent line is horizontal y = (x^6/6) - (x^2/2) + 1

285. Calculus

Find all points on the curve here the slope is 1 y = x^4 - 31x + 11

286. English

What is the phonlogy?

287. philosophy

how did existentialism fail?

288. social studies

what was the ice age and how did it change New York

289. Drop out of the schools

What caused the background of the droping out of the schools?

290. climate change

What would our climate be like if the earth was shaped like a cube instead of a sphere? thanks

291. Physical Science

What is an example of radioactive decay?

What exposure will a radiology technologist receive when exposed for 10 minutes at 4 meters from a source with intensity of 100 mR/min at 1 meter?

293. Calculus

Using Law of Sines: Need Help 1. alpha=70 Degrees Beta=38 Degrees a=35

294. physics

A car accelerates uniformly from rest to a speed of 24.2 km/h in 5.1 s. Find the distance it travels during this time. Answer in units of m

295. Science

how much heat is required to change 5 grams of iron to 10c

296. physics

A car starts from rest and accelerates for 6.7 s with an acceleration of 1.6 m/s2 . How far does it travel? Answer in units of m

297. Eating disorder

if anorexic people see theirselves as "fat" in the mirror, why do they still buy small sized clothing...?

298. economics

Ali pays Rs. 855 property tax.What is the assesed value of his home, if the tax rate in his locality is 2.5% ?

299. Math

Find the LCM. 1. 20, 36 * 720 * 180 * 90 * 45

y=2x-1

301. chemistry

How do i find the weight % of sulfate if I am given the mass?

302. chemistry

Very carefully explain which will evaporate faster under conditions: 50.0 mL of distilled waater or 50.0 mL of sea water.

303. childcare

Children learning to take their heart rates are demonstrating... A.movement relations B.fitness concept C.body awareness D.body concept

304. English

What is the marphology?

305. childcare

A child throws a ball with speed and accuracy when he plays catch with his teacher, but his throws are slower and less accurate when he plays with a group of friends. This difference is explained by.. A.classical stage theory B.probability theory

306. Algebra 1

How do you put percents into degrees? For example: 25%= ?degree

307. math

8 is greater than 43 and less than 52. If you add the digit the sum is 8. Write the number word

308. math

8 is greater than 43 and less than 52. If you add the digit the sum is 8. Write the number word

309. chemistry

Explain the difference between the rate of a reaction and its rate constant.

310. chemistry

what does SPDF mean in chemistry on the periodic table? What is the PDO format in when writing a lab report? pls help

311. physics

A gun is fired at a bird sitting on a distant tree.If the barrel of the gun is aimed directly at the bird,will the bullet directly hit the bird?

312. chemistry

Account for the increase in reaction rate brought about by a catalyst.

313. Math

I am a 5 th grader who need some help my mom is blind. What is the elapsed time: (1) Between 3:45- 9:00 (2) 6:50-7:00

314. Math Help

Divide -270r^13 by 9r^8

315. 11 French

would someone be able to correct my paper? It's not finished yet, but this is what i have so far: L’image que j’ai dessiné représente le monde dans façons different. Les drapeux symboliser les pays different artour du monde. La Allemagne, Les Etats-

316. math Help

multiply (x^2+x+6)(x-6)

317. Math

1/8b = 6 what is b=

318. math

what is the equation for 12 divided into a number. is it n/12

319. Soldiers during WWI

Hey Ive written my paragraph on the miserable lives of these brave soldiers. And my title at first was A soldier's deadly life full of dangers, but I want to make the title much more catchier than this, so I thought of something cool like, "Stepping into a

322. Math Help

multiply (x+12)(x-12) I get x^2-144 is this correct????

323. science

what you could see at fire station?

324. equations

12^2+2 [(13+3)] / 2^2] -4(3)+5[7-6(-4)^2] -5(3)+3[9-6(-3)^2] please show me how to do these

325. operating a car

Which one of these statements is true about a "bumper-to-bumper"waranty. A.Normal wear and tear is NOT covered by the warranty. B.All expenses expect gosoline and routine oil changes are covered by the warranty. C.Everything part and system is covered

326. Math

I have input x (20,1,40,4,8,10) and output y (2,40,1,10,5,4). What is the function?

327. Math Help

Multiply (9x^8)(6x^5) 54^13 is this the right answer????

329. Math Help

-x^2-2x+15=0 How would I solve this?

330. math

Use compatible numbers to estimate each difference.

331. Math

I am a 5 th grader who need some help my mom is blind. What is the elapsed time: (1) Between 3:45- 9:00 (2) 6:50-7:00