1. Chemistry

Consider two cells, the first with Al and Ag electrodes, and the second with Zn and Ni electrodes, each in appropriate 1.00M solutions of their ions. If 2.10g of metal is plated in the voltaic cell, how much metal is plated in the electrolytic cell?

2. Chemistry

Calculate delta G of the reaction at 25 degrees C: 2Au^3+ (aq) + 3Ni(s) 2Au(s) + 3Ni^2+(aq) Au3+ + 3e- ==> Au Eo = +1.50V Ni2+ + 2e- ==> Ni Eo = -0.23 V 2Au3+ + 3Ni ==> 3Ni2+ + 2Au The answer is -1.00 x 10^3 kJ but i'm not getting that answer!!!!!!! please

3. Chemistry

A current of 5.18 A is pass through a Cr(NO3)2 solution for 1.20 hours. How much chromium is plated out of the solution? __g I have no idea how to approach this. Here's what I tried to do logically but I'm not sure if it works out: I know that the

4. physics

Residents of Hawaii are warned of the approach of a tsunami by sirens mounted on the tops of towers. Suppose a siren produces a sound that has an intensity level of 120 dB at a distance of 2.0 m. How far away can the siren be heard?

1) A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 71 kg, and the height of the water slide is 12.0 m. If the kinetic frictional force

Four very thin rods, each 8.3 m long, are joined to form a square. The center of mass of the square is located at the coordinate origin. The rod on the right is then removed. What are the x- and y-coordinates of the center of mass of the remaining

A high-jumper clears the bar and has a downward velocity of -6.00 m/s just before landing on an air mattress. The mass of the high-jumper is 53.7 kg. What is the magnitude and direction of the impulse that the air mattress exerts on her? Assume that upward

8. ALGEBRA

Assume that a dart is randomly thrown at the dartboard shown here and strikes the board every time. The payoffs are listed on the board. How much should you be willing to pay for the opportunity to play this game? (Give your answer to the nearest cent.)

9. Physics

A 1,500kg truck moving at 15 m/s strikes a 750 kg automobile stopped at a traffic light the vehicle. The vehicles hook bumpers and skid together at 10 m/s. What is the decrease in kinetic energy?

10. math

In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 16% of your total grade, each major

11. Science/Physics

Explain why a rapidly spinning gyroscope, mounted in a frame that allows it to rotate in any direction independently of the frame’s rotation, tends to maintain its axis pointed in the same direction in space. I just am not getting this!

12. physics

A 0.200 kg block of ice at 15ºC is placed into a pan on a stove, heated to a liquid, and then to vapour with a final temperature of 115ºC. Calculate the total amount of heat required for this process.

13. physics

A building has become accidentally contaminated with radioactivity. The longest-lived material in the building is strontium-90. (The atomic mass of Sr is 89.9077 u.) If the building initially contained 4.8 kg of this substance and the safe level is less

14. Physics

A rotating space station has radius 1270 m, measured from the center of rotation to the outer deck where the crew lives. What should the period of rotation be if the crew is to feel that they weigh one-half their Earth weight? I got 101.1 seconds... is

15. Physics

A plane leaves Seattle, flies 84.0 at 21.0 north of east, and then changes direction to 53.0 south of east. After flying at 125 in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches a rescue

16. Chemistry

The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2+ (aq, 0.100 M)||Zn2+ (aq, ____ M)|Zn(s) is 24.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode. My textbook advised me to use the Nernst Equation and

A car (mass = 1140 kg) is traveling at 27.3 m/s when it collides head-on with a sport utility vehicle (mass = 2380 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle

18. Alg I

One type of decorative ribbon regularly costs $3.59 per yard. When the ribbon is on sale, it cost$2.19 per yard. Which is the closest to the difference in the cost per inch for the ribbon when it on sale compared to its regular price? A. 1.9 cents per

19. Chemistry

a basketgball is inflated to a pressure of 1,50 atm in a 20.c garage. What is the pressure of the basketball outside whre the temperature is -5.00 C?

20. statistics

of the physics graduates of a university, 35% received a starting salary of $50,000 or more. If 5 of the graduates are selected at random, find the probability that all had a starting salary of$50,000 or more.

21. physics

Two crates A and B connected together by a light rope are pulled along a factory floor by an applied force, F. Crate A has a mass of 50 kg and the coefficient of friction (μ) between crate A and the floor is 0,25. Crate B has a mass of 35 kg and μ

22. Bus Stat

Statistics: Many track hurdlers believe that starting in the inside lane closest to the field has better chance of winning. closest to the field is lane 1, nxt is lane 2, etc until Lane 6. find the critical value x20 to test the claim that the

23. Math

Vanessa has 17 quarters, 8 dimes, 15 pennies, and 14 nickels in a piggy bank. Which of the following measures of central tendency will change if she spends 4 quarters to get a soft drink? Mean, median, mod, or none will change? Why?

24. math

The call letter of a radio station must have 4 letters.The first letter must be a K or a W. How many different station call letters can be made if repetitions are not allowed? *(If repetitions are allowed?)* *Important

25. college ststistics

A. find the binomial probability p(x=5) where n=14 and p=0.30. B. setup without solving the binomial probability p(x is at most 5) using probability notation C. how would you find normal approximation to the binomial probability p(x=5) in part A. please

26. General Chemistry

If 50.0grams of copper initially at 145.0 C is put into 150.0mL of water initially at 25.00C, then what will the final temperature of the mixture be? assume that all of the heat lost by the hot copper is absorbed by the cold water.

27. Calculus - Optimization

A cylindrical container with a volume of 3000 cm^3 is constructed from two types of material. The side and bottom of the container cost $0.10/cm^2 and the top of the container costs$0.20/cm^2. a) Determine the radius and height that will minimize the

Nitrogen gas molecules, which have mass 4.65×10−26 kg, are striking a vertical container wall at a horizontal velocity of positive 440 m/s. 5.00×1021 molecules strike the wall each second. Assume the collisions are perfectly elastic, so each particle

29. Alg I

Please explain how to solve: Laura can pressure wash her driveway at an average rate of 15 square feet per minute. Which is closest to this rate in square yards per second? A. 0.35 B. 0.24 C. 0.03 D. 0.01

42. physics

After 1.84 days, the activity of a sample of an unknown type radioactive material has decreased to 85.8% of the initial activity. What is the half-life of this material? (in days)

43. Chemistry

By using the data in this question, estimate how much oxygen a person requires on average in a life time and how far a motor can go using the same amount of oxygen. the typical daily food requirement of a person can be considered to be 1.2 kg of

57. Psychology of Learning

Olds and Milner (1954) performed experiments on rats to determine:

58. chemistry

What mass of K2CO3 is required to clean up a spill of 339 ml of 2.65 M HCl if HCl(aq) reacts with K2CO3 according to 2HCl(aq) + K2CO3(aq) ¨ 2KCl(aq) + CO2(g) + H2O(l)?

59. HCR 210

Select an accreditation agency and name an area of records management that is affected by its guidelines. How does accreditation affect the practical activities of record management in hospitals?

60. ALGEBRA

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 175 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 167 and 183 cm tall? (b) How many would you expect to

61. science- hydroponics

the advantage of gravel is that it makes it better to grow plants that you eat? the disadvantage of gravel is that gravel can not hold the plant?

What is the name of: ZnNO3, of (NH4)2O, of Rb3PO4, or NH4ClO4?

63. Statistics

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

64. chemistry

how to calculate molar concentration of a 500 millimeter solution that contains 20 gram of CaBr2 ?

65. Art

Can you also help me find online material on how to write a "tale"? I should also refer to Poe's tales and its main features. Can you think of another important American writer of tales? Thank you very much, Writeacher!!

66. algebra

Find the variation constant and an equation of variation where y varies directly as x and y =4 when x=1. the variation constant is K= the variation constant is y =

67. statistics

Reading placement scores for a particular college are normally distributed with a mean of 72 and a standard deviation of 7. a) draw a sketch of the reading placement scores for students at this college. be sure to mark the mean and also to mark one and two

68. English

i not get what this poem mean it be a ballad but i not get what theme be do the guy girl be in strong bond? True Thomas lay on Huntlie bank; A marvel he did see And there he saw a ladye bright Come riding down by the Eildon Tree. Her skirt was o' the

69. Art

I need to prepare a short dissertation on the dystopian novel and the theme of totalitarianism or subordination (the parody of Stalin, Hitler, Winston Smith and Winston Churchill). Here is a short summary of Huxley’s novel “Brave New World”. Could

86. math

You need to hire a part-time associate to work 30 hours a week in your store. You have $250 in labor budget for the new associate each week. You just interviewed an excellent candidate for the position who has requested to be paid$9.00 per hour. Your

87. Math

Given the graph of y = g(t), determine the value of t for which g(t) = −3 . Answer as an integer.

88. Art

Here is the second part of the summary. Thank you, Writeacher. 1) Huxley describes a utopian society determined by a scientific caste system in which human beings are born artificially on an “assembly line” divided into different categories which

89. math

create a situation that can be modelled by this linear system, then write a related problem. 10x + 5y = 850 x - y = 10

90. math

The ticket machine at the service counter was not operating correctly and began to skip every third ticket, beginning with ticket 430. how many tickets were skipped between ticket 431 and ticket 444?

91. English

Please check. I. Correct any errors in the following sentences. Do not use different verbs (for example, “recline” instead of “lie down”). Provide the correct form of the verb given: 1. Yesterday I let my students lay down for a nap, but most of

92. Informal Logic

A conditional sentence with a false antecedent is always true false Cannot be determined not a sentence i believe it is true but unsure Please help me

93. Functions

How do you determine (without graphing) if the polynomial has line symmetry about the y-axis, point symmetry about the origin, or neither. The function is: f(x)= -x^5 + 7x^3 + 2x

94. Math

in the center of the first sheep of graph paper, draw a figure with straight sides that will fit in a 15 by 20 block (the figure can be hard or easy so I was thinking of going with a simple rectangle). On the second sheet of graph paper draw the same

95. computers

who created coach leather

96. physics

An object has a height of 65 cm and is positioned 6.2 m in front of a spherical mirror. Its image distance is 1.9 m. Calculate the height (including its sign) of the image in centimeters.

97. college statistics

a set of data is normally distributed with a mean of 1000 and a standard deviation of 100.what would be standard score for a score of 900.what percent of scores is betyween 1000 and 900.what would be percentile rank for a score of 900.

98. english

THANK U SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO MUCH FOR THE INFORMATION MS.SUE

99. HIS 103

hat factors explain medieval Islam's relatively high level of tolerance for non-believers, and did regions controlled by the Roman Catholic Church share that broad acceptance?

100. HIS 103

Roman" other than its formerly being part of the Roman Empire? How Roman was it when it spoke Greek and, after the 11th century, was no longer Catholic?

101. Science/Biomaterials

Given the following properties, how much stretch would you expect to occur in a specimen of polyethylene to which a tensile load is applied? l = change in length Length = 10 cm Cross-Sectional Area = 1 cm2 Young's Modulus = 200 GPa Applied Load = 1000 kN

102. Art

I left out the following sentences. Thank you very much, Writeacher. 1) He feels tenfold more evil than Hyde but also more free. 2) He realizes a potion capable to split up his soul, to separate the good side from the evil one. 3) The image of his friend

103. algebra

Hat sizes determined by measuring the circumference of one's head in either inches or centimeters. Use ratio and proportion to complete the following table. Hat size Head circumference Head circ 71/4 to nearest 1/5 in. near cm.

104. Physics

A rollercoaster car speeds up and down a hill past points a, b, and c as shown. The car has a mass of 500 kg and a speed of 25.0 m/s at point B where the track radius is 10 m. A: What is the maximum speed the car can have at point c, radius 19.6 m, for the

105. Math

The ratio of the cost of an adult ticket to a student ticket for the circus is 5:3. If \$32 is the total spent on tickets, how much was each adult ticket and how much was each student ticket?

106. Art

I left out the following sentences. Thank you, Writeacher. 1) The poet sees his dying friend as if he were (was??) drawning in the deadly gas. 2) The memory of his dying friend returns in the poet's dreams (nigtmares is possible?).The poem is addressed to

107. nutrition in drinks

1.homany kj per 100ml in 2 Lt.apple juice? 2.sodium per 100ml? 3.sugar per 100ml.?

1)A 1180-kg van, stopped at a traffic light, is hit directly in the rear by a 753-kg car traveling with a velocity of +1.81 m/s. Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is

109. Why Viscosity of honey change when water is added

Why does the viscosity of honey change when water is added to it? I have seached the whole internet but can someone please explain this to me in forms of year 11 chemistry. Is it because water is less viscous then honey and so when added to honey the

110. algebra

A sample of 134 firecrackers contained 6 duds. How many duds would you expect in a sample of 2,546?

111. science-check

what is the advantages and disadvantages of using sand to grow? the advantage is that it anchors it? the diadvantage is it cant hold the plant up?

112. math

Graph y = ½ x^2 – x +3 for 0≤x≤6 (b) Calculate the mid- ordinates for 5 strips between x = 1 and x 6, and hence use the mid-ordinate rule to approximate the area under the curve between x = 1, x = 6 and the x- axis. (c) assuming that the area

113. physics

The coordinates of an object moving in the xy plane vary with time according to the equations x = −6.85 sin ùt and y = 4.00 − 6.85 cos ùt, where ù is a constant, x and y are in meters, and t is in seconds. (a) Determine the components of velocity of

114. hcs 545

Write a 1,400- to 1,750-word paper on a current health care situation. For example, common issues might include one of the following: physician or employee with a conflict of interest, health care fraud and abuse, medical error, quality of care issues,

115. Technical Communication

A structured process that gathers information about specific use from people similar to the intended users is called?

116. physics

a person completes 5 rounds of a field. if radius of the field is 70m , calculate the distance and the displacement covered by the person during his trip .

117. chemistry

an engine operating between 100 degree celsius and 0 degree celsius takes 453.6 k cal of heat. The usefull work done by it is ? plz teach me the way of calculating it

1) David has a mass of 86.4-kg and is skating with in-line skates. He sees his 24.8-kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 2.99 m/s. Ignoring

119. Science - HELP!!!!

in general, are wildlife population constant or do they tend to fluctuate? Explain. In science on friday we played this game called "Oh Deer". If you google it and click on the first one and read it you'll get a better understanding. please help im

120. Math

For what value of b will the polynomial P(x) = 4x^3 - 3x^2 + bx + 6 have the same remainder when it is divided by x - 1 and by x + 3?

121. MATH

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 9. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single,

122. FACS

The what of a microwave oven is the amount of electricity used to create microwaves?

123. goal writing

can you give me some ideas on writing goals and a action plan for starting college

124. english

i am writing a speach . and i need your help to give me 15 ideas .the speach is if i ruled the world . (tell me your ideas)

125. college ststistics

find area under the standard normal curve A). p(z>0.58) B. p(-1.10

126. math

i need a tip on function table please

127. psychology

Hello, where can I look to find the answer for how are research methods Godly?

128. chemistry/help

In solid form, what element has the lowest density? Which has the highest density? 1. Hydrogen is the lowest density solid 2.which element has the highest?

129. Math

Please for an example of statistical reporting.

130. PSY 240

How will you answer this question. I don't eat beacuse every time I do, I just feel sick! Do you know why this is?

131. math

what is different between a decimal and a decimal point?

132. math

there are 23 of? in 2.3

133. math

In a car race, there are 6 chevrolets, 4 fords, and 2 pontiacs. In how many ways can the cars finish if we consider only the makes of the cars?

134. FSFG

HOW CAN YOU DIVIDE IMPROPER FRACTION

135. math geometry

what conclusion states the equality of the measures of two angles for CD bisects angle ABC?

136. how to find domain and range

how do I find the domain and range of y= 5/(2x+1) -4

137. health

How is the nervous system used when you eat

Determine the specific gravity of a fish which masses 320g in air and has an apparent mass of 21g in water

139. accounting

How can we pass the entry in journal and how can we check that which expenses comes in debit side nd which comes in credit side?

140. accounting

amair started the business with a capital of rs60000 on 1jan 2009 during the year he had with drawn goods rs8000 and cash rs5000for personal use he has also paid life insurance premium rs.2000 he had aiso introduced additional capital of rupees 20000 on

142. ALGEBRA

A class obtained the following scores on a test. Find the mean, the median, the mode, and the range for the class. Test Score Frequency 90 2 80 2 70 12 60 4 50 3 40 2 (a) Find the mean = I had the median, mode and the range correct except the Mean, please

143. math

i am very confused with the question: when a cross tile is placed on a number chart no matter how large the cross tile becomes the number covered by the centre of the cross-tile is the average of all of the numbers covered.

144. physics

A car that is traveling at 28.16 m/s is going about

145. chemistry

how will know the hydroxide concentration for a solution with a pH of 10 at 25 degree celsius?

146. chemistry

In solid form, what element has the lowest density? Which has the highest density? -Hydrogen is the lowest density solid 2.which element has the highest? can you help?

147. chemistry

A weather balloon if it starts with 10 liters of helium at 0km elevation and a temperature of 20 degrees. it is released and rises up through the atmosphere to an elevation of 12km where the temperature is -60degrees. calculate the volume of the helium at

148. to ms.sue

i went on the website, but the part about sand, i really don't understand.

149. ALGEBRA

Find the requested probabilities. $$P(\overline{A}) \ \text{if} \ P(A) = {\color{red}0.9}$$ P(A) =

150. Art

I urgently need you, Writeacher, to check these sentences. Thank you very much in advance. 1)He uses a particular salt, adds it to other components and brings it to the boil. Once the boiling (better ebullution??) has subsided (ceased?), he drinks the

151. physics

A car that is traveling at 28.16 m/s is going about

152. algebra

The number N of aluminum cans used each year varies directly as the number of people P using the cans. If 54 people use 19,926 cans in one year, how many cans ae used in a city which has a population of 1,485,000

153. ALGEBRA

Find the range and the variance (correct to one decimal place). 77, 92, 93, 93, 98 (b) Find the variance = I had the range correct except the variance.

154. math

A cylinder labeled X has a height of 10 inches and a radius of 15 inches. Another cylinder labeled Y has a height of 40 inches and a radius of 60 inches. The volume of cylinder Y is _______ times the volume of cylinder X.

155. Algebra 1

find the number one-third of the way from 1/6 to 4/5