# Samantha

Most popular questions and responses by Samantha-
## chemistry

what volume (in ML) of a 0.150 M HNO3 solution is required to completely react wtih 35.7 mL of a 0.108 M Na2CO3 solution according to the following balanced chemical equation? Na2CO3(aq) + 2 HNO3(aq) --> 2NaNO3(aq) + H2O(l) then, in the reaction above,

*asked on June 21, 2010* -
## social studys

what was the purpose of the war production board A. to tell factories how many planes or tanks each factory had to produce. B. to help factories shift from making consumer goods to making war materials.****** C. to ship war materials over to the allies D.

*asked on March 6, 2017* -
## English

1. All of the following quotes from "The Swimming Contest" are intended to foreshadow the future conflict between the narrator and Abdul-Karim EXCEPT A. "But it's not true that we're driving the Arabs out. We are out for peace, not war."***** B.

*asked on May 12, 2017* -
## English

1. Read the following passage from "The Swimming Contest." With a sigh my mother replies, "My husband's no longer alive, either. But his house and his father's house aren't here; everything remained over there, abroad, and I live in a rented apartment

*asked on May 12, 2017* -
## social studys

Compare and contrast the rise and fall of Germany and japan during the period of world war Il Please help me with this.

*asked on March 20, 2017* -
## Math

which of the following can represent the measure of the three angle in an acute triangle? A. 59, 61,62 B. 30, 25, 125 C. 56,72,52•• D. 90, 45, 45 Plz correct me!!

*asked on January 27, 2016* -
## science

Calculate the density of sulfur hexafluoride gas at 703 torr and 23°C. density is mass/volume so how do i get those from what i am given? also ) Calculate the molar mass of a vapor that has a density of 6.735 g/L at 11°C and 743 torr.

*asked on December 15, 2012* -
## English

1. Read the following passage from "The Swimming Contest". "Come over here, Nahida," the old lady said," and kiss the hand of the hakima who cured your grandmother. And this is her son." Nahida came hesitantly into the room and stood in front of my mother.

*asked on May 12, 2017* -
## Physical education

What are the branches of physical education?

*asked on September 14, 2018* -
## physics

After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 62.3 m horizontally from the end of the ramp. His velocity, just before landing, is 22.0 m/s and points in a direction 40.3 ° below the horizontal. Neglecting

*asked on October 5, 2013* -
## chemistry

10.0 mL of a Cu2+ solution of unknown concentration was placed in a 250 mL Erlenmeyer flask. An excess of KI solution was added. Indicator was added and the solution was diluted with H2O to a total volume of 75 mL. The solution was titrated with 0.20 M

*asked on November 19, 2014* -
## math

a wire is bent to form four semicircles all with diameters of 32 cm, how long is the wire? round to the nearest hundredth

*asked on May 7, 2016* -
## chemistry

Write a balanced equation for the reaction between perchloric acid and lithium carbonate.

*asked on April 14, 2015* -
## English {2 Questions}

1. Identify the statement that is a verifiable fact. A. Teenagers seem to prefer texting to talking when it comes to cell phone use. B. Lifeguarding is one of the easiest and most lucrative summer jobs for teenagers. C. The number of teenagers who own and

*asked on May 11, 2017* -
## Math

Hi y’all, me again. Can you help me on this? I got some answers, and I hope they are all right. Please let me know! Thanks! :) 1.2(y + 1) for y = 2 A. 6 B. 5 C. 7 D. 8 Is it “A”? 2. The cost in dollars of a school banquet is 74 + 12n, where n is the

*asked on December 7, 2015* -
## langauge arts

Which of the following forms of poetry expresses the thoughts and feelings of a single speaker, often in highly musical verse. Limerick my answer Free verse Haiku Lyric Which of the following pairs of poetry elements best help the reader to identify the

*asked on January 19, 2016* -
## English

1. Identify the correctly punctuated sentence. A. Monarch butterflies migrate long distances each year—other butterflies live in southern climates throughout the year. B. Monarch butterflies migrate long distances each year, other butterflies live in

*asked on May 12, 2017* -
## Physical education

What are the branches of physical education?

*asked on September 14, 2018* -
## geometry

The area of a triangular garden can be no more than 120 feet square feet. The base of the triangle is 16 feet. What is the height of the triangle?

*asked on August 31, 2011* -
## AP Chemistry

Two solid objects, A and B, are placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g water at 10.0 degrees Celsius. Object A increases the water temperature by 3.50

*asked on December 2, 2010* -
## Physics

A toboggan approaches a snowy hill moving at 11.1 m/s . The coefficients of static and kinetic friction between the snow and the toboggan are 0.410 and 0.280, respectively, and the hill slopes upward at 42.0 ∘ above the horizontal. A)Find the

*asked on February 14, 2016* -
## Mathematics

A drug response curve describes the level of medication in the bloodstream after a drug is administered. A surge function S(t) = At^(p)e^(−kt) (where t > 0) is often used to model the response curve, reflecting an initial surge in the drug level and then

*asked on January 17, 2016* -
## Algebra

During a softball game, a batter hits a ball upward from an initial height of 3 feet. The height, in feet, of the softball is given by s(t)=−16t^2+70t+3 , where t is time in seconds and . Which is closest to the time when the softball will be 50 feet

*asked on December 5, 2013* -
## Science

1. If the net force on an object is O N, the forces are considered unbalanced. true false** 2. Most people in the United States use feet and miles to measure distance in their everyday lives. Why do scientists in the United States use meters to measure

*asked on February 11, 2016* -
## Math

A football team lost 9 yards on each of three consecutive plays. What was the team's total change in position for the three plays?

*asked on September 14, 2017* -
## Calculus, check my answers, please!

Could someone tell me if I'm right, and if not what the correct answer is? Thank you! I'd appreciate an explanation, too, if you could. :) 1. Suppose you're given the following table of values for the function f(x),and you're told that the function is

*asked on October 2, 2013* -
## Calculus, check my answers, please? :)

Okay, so I think these are right, but I would appreciate if someone could check them and tell me if something is wrong and what the right answer is. I'd also appreciate an explanation if possible. :)Thank you! 7. Given that f(x)={x^3 if x ≥ 0 {x if x < 0

*asked on October 2, 2013* -
## Social Studies

Why did President Abraham Lincoln want Reconstruction to be simple and easy? Choices are: A. He wanted to win the votes in the South in his reelection campaign. B. He wanted to keep a good working relationship with former Confederates who would probably

*asked on February 16, 2012* -
## Trig Help Please

A smokestack is 200 ft high. A guy wire must be fastened to the stack 30.0 ft from the top. The guy wire makes an angle of 42.0° with the ground. Find the length of the guy wire.

*asked on May 7, 2017* -
## chemistry

what volume (in L) of 0.150 M KCl solution is required to completely react with 0.150 L of a 0.175 M Pb(NO3)2 solution according to the following balanced chemical equation? 2KCl (aq) + Pb(NO3)2 (aq) --> PbCl2 (s) + 2 KNO3 (aq)

*asked on June 21, 2010* -
## Science

Hi! I just want to make sure my answers are correct. (Key: * means that is my answer.) A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces on the ball. True False* A ball slowing down as it rolls across the

*asked on April 19, 2017* -
## Chemistry

What is the mass, in grams, of a pure iron cube that has a volume of 4.30 cm3?

*asked on February 2, 2015* -
## Finance

Spam Corp. is financed entirely by common stock and has a beta of 1.0. The firm is expected to generate a level, perpetual stream of earnings and dividends. The stock has a price-earnings ratio of 8 and a cost of equity of 12.5%. The company's stock is

*asked on March 17, 2012* -
## algebra

If x2 = 20, what is the value of x? ±square root of 10 ±square root of 20 ±10 ±40

*asked on October 7, 2015* -
## Writing Skills Part 4

2.which of the following would most likely be an entry in a topic outline? A.Toys can be gender - neutral. *B.Toys children love C.Quality toys should require some imagination D.It's possible for toys to be both educational and entertaining. Thank you for

*asked on March 2, 2015* -
## CALCULUS

If you could give an explenation with the answers, that'd be wonderful so I actually know how to solve similar problems in the future. :) Thank you so much! 1. A convex lens with focal length f centimeters will project the image of an object on a point

*asked on November 10, 2013* -
## Math

The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. If two light sources, one four times as strong as the other, are placed 11 ft

*asked on November 14, 2011* -
## Chem

Some very effective rocket fuels are composed of lightweight liquids. The fuel composed of dimethylhydrazine (CH3)2N2H2 mixed with dinitrogen tetroxide was used to power the Lunar Lander in its missions to the moon. The two components react according to

*asked on February 24, 2009* -
## History

The Bourbon Democrats would have been likely to support which of the following? (Choose all that apply.) 1. lower taxes 2. less government spending 3. growth of industry 4. African American rights 1 and 4 ?

*asked on February 23, 2016* -
## Chemistry

Write a balanced equation for the combustion of gaseous ethylene (C2H4), an important natural plant hormone, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water

*asked on March 31, 2015* -
## Chemistry

Your computer monitor has a width of 14.56 inches and a height of 10.92 inches. What is the area of the monitor display in square meters?

*asked on February 2, 2015* -
## College Chemistry

Calculate the unknown of Ag+ if the potential of the following concentration cell is 300 mV at 25.0 C. Ag|Ag+(unknown)||Ag+(0.100M)|Ag I think I have to use Nernst Equation of Ecell=E0-.0592/nlogQ And at 25C is at 298K so i don't have to change anything. I

*asked on May 6, 2015* -
## Calculus questions..really need help, please!

1) Find the value of the lim(x->0) ((sin5x/sin2x)-(sin3x-4x)). I have no idea where to start so if someone could start it off for me it would really help. 2) If f(x) = (2x-3)/(5x+4) then what's the inverse of f(x) So I replaced x with y x = (2y-3)/(5y-3)

*asked on November 4, 2008* -
## Art PlZ HELP MEE!!!

Unit 4 Lesson 5 10. All of the following help an artist to learn to experimentation except A. Using standard materials in that manner in which they were intended. B. using standard techniques in new combinations to Create different effects. C. Creating new

*asked on January 6, 2016* -
## language arts

Which of the following name figurative Language. Metaphor Rhythm Definition my answer Dialogue Which of the following lines of poetry contains a simile The smell of sweet happiness swirls from the bakery door The last bird-song of the day greets the

*asked on January 19, 2016* -
## Chemistry

When ammonium chloride is dissolved in water, the solution becomes colder. What can you say about the relative magnitudes of the lattice energy of ammonium chloride and its heat of hydration? Why does the solution form? What drives the process?

*asked on September 20, 2010* -
## chemistry

Arrange the following oxides in order of increasing acidity: P2O5, As2O5, N2O5, SnO2, SeO3, and BaO. (Use the appropriate symbol to separate substances in the list.) I have no idea how to do this! please help!

*asked on November 25, 2012* -
## english

Snow skiing is a very exciting sport. what type if sentence pattern is this? S-v,s-v-io, s-v-io-do,e-v-s,s-lv-pn,s-lv-pa, s-v-do-oc, question pattern

*asked on July 10, 2012* -
## algebra

Solve In 4+in(3x)=2 round to the nearest hundredth

*asked on January 24, 2018* -
## John jay college

A random sample of n = 9 scores is obtained from a population with μ = 50 and σ = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean? z = 3.00 z = 1.00 z = 9.00 cannot determine without additional information

*asked on July 22, 2012* -
## Physics

A golfer on a level fairway hits a ball at an angle of 25° to the horizontal that travels 103 yd before striking the ground. He then hits another ball from the same spot with the same speed, but at a different angle. This ball also travels 103 yd. At what

*asked on August 31, 2018* -
## chemistry help!

A sample of methane gas, CH4 was collected over water at 25 degrees celcius and 720 torr. The volume of the wet gas is 2.50L. What will be the volume of the dry methane at a standard pressure?

*asked on December 1, 2010* -
## Chemistry

Ethanol, C2H5OH, is mixed with gasoline and sold as gasohol. Use the following to calculate the grams of ethanol needed to provide 367 kJ of heat. C2H5OH(l) + 3 O2(g) ¨ 2 CO2(g) + 3 H2O(g) ƒ¢H = −1235 kJ

*asked on November 21, 2011* -
## physics

Gravitational force of attraction “F” exists between two point masses A and B when a fixed distance separates them. After mass A is doubled and mass B is quartered, the gravitational attraction between the two masses is

*asked on April 21, 2010* -
## Calculus, check my answers, please! 3

Did I get these practice questions right? 1. Suppose that f is an even function whose domain is the set of all real numbers. Then which of the following can we claim to be true? ***The function f has an inverse f –1 that is even. The function f has an

*asked on October 2, 2013* -
## math

Compare the function with the parent function. What are the vertex, axis of symmetry, and transformations of the given function? y = |10x-2| -7

*asked on January 24, 2018* -
## Math

A rose garden is designed by joining a rectangle and a semicircle, as shown below. The rectangle is 29ft long and 17ft wide. If the gardener wants to build a fence around the garden, how many feet of fence are required? (Use the value 3.14 for pi, and do

*asked on April 18, 2013* -
## chem-answer check please

Compounds like CCl2F2 are known as chlorofluorocarbons, or CFCs. These compounds were once widely used as refrigerants but are now being replaced by compounds that are believed to be less harmful to the environment. The heat of vaporization of CCl2F2 is

*asked on January 10, 2013* -
## Physics

The toy car in figure 6-12 runs off the edge of a table that is 1.225-m high. The car lands 0.400m from the base of the table a.How long did it take the car to fall? b.How fast was the car going on the table?

*asked on October 21, 2010* -
## elements of design

1. Study the following sentence, then select the answer that best describes it. THE COW JUMPS OVER THE MOON! A. Italic serifed type B. Bold roman sans serif type C. Bold italic sans serif type(my answer) D. Bold roman serifed type 2. Which one of the

*asked on February 7, 2012* -
## chemistry

The space shuttle environment control system handles excess CO2 (it is 4.0% by mass of exhaled air) by reacting it with lithium hydroxide, LiOH, pellets to form lithium carbonate,Li2CO3, and water. If there are 7 astronauts on board and each exhales 20. L

*asked on July 26, 2011* -
## algebra

The 4200 km trip from New York to San Francisco take 6 h flying against the wind but only 5 h returning. Find the speed of the plane in still air and the speed of the wind.

*asked on November 7, 2012* -
## math

Name the property of real numbers illustrated by the equation -3(x+4)=-3x-12

*asked on January 24, 2018* -
## AP World History

Compare the position of upper-class women in classical Indian, Chinese, Greek, and Roman societies with regard to their ability to hold property, opportunity to pursue careers outside the home, rights in marriage and divorce, and level of education? hey!

*asked on November 25, 2013* -
## Chemistry

Equilibrium constants at 25 ∘C are Substance Kc Value of Kc CaCO3 Ksp 4.5×10−9 H2CO3 Ka1 4.3×10−7 Ka2 5.6×10−11 What is the molar solubility of marble (i.e., [Ca2+] in a saturated solution) in acid rainwater, for which pH=4.20?

*asked on June 16, 2015* -
## Math

Number Sense Fabio said that there are 3 times as many people on a basketball team as on a tennis team. Is he correct? Explain why or why not. Tennis--2 players Basketball--5 players Softball--10 players

*asked on February 11, 2013* -
## Math calculation

A stock bottle contains 2.5 L of solution. How many 2 oz bottle can be filled using the stock solution?

*asked on May 14, 2016* -
## Chemistry

Calculate the pH values and draw the titration curve for the titration of 500 mL of 0.010 M acetic acid (pKa 4.76) with 0.010 MKOH. Calculate the pH of the solution after 490 mL of the titrant have been added.

*asked on February 5, 2017* -
## Statistics

I need help with this problem. I think I have some of the answers right but I'm not sure. There is a data set consisting of 33 whole-number observations. Its five number summary is (16, 20, 22, 30, 46) 1. How many observations are stricty less than 22? I

*asked on September 22, 2009* -
## chem

Which member in each pair has the stronger intermolecular dispersion forces? CH3CH2CH2I or CH3CH2I or neither? how do you know this

*asked on January 9, 2013* -
## Math (Algebra/Pre-Algebra)

What is the 23rd term in the arithmetic sequence: 11, 14, 17, 20...? All I need is the formula to find the it because I have to show work. Thanks.

*asked on June 4, 2009* -
## Algebra

a theater wants to take in at least $2000 for a certain matinee. children's tickets cost $5 each and adult tickets cost $10 each. the theatre can seat up to 350 people. find five combinations of children and adult tickets that will make their goal.

*asked on January 4, 2016* -
## social studys

why did mass culture in the form of entertainment emerge in the 1920's

*asked on February 10, 2017* -
## Chemistry

Two solid objects, A and B, are placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g water at 10.0 degrees Celsius. Object A increases the water temperature by 3.50

*asked on December 1, 2010* -
## Statistics

smith is a weld inspector at a shipyard. he knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completed that shift, would it be unusual for

*asked on December 1, 2013* -
## chemistry

How much heat is evolved when 1258 g of water condenses to a liquid at 100.°C?

*asked on May 10, 2010* -
## biochemistry

Which of the following statements about noncovalent bonding interactions is NOT true? Which of the following statements about noncovalent bonding interactions is NOT true? All noncovalent bond interactions are inherently electrostatic in nature. Van der

*asked on February 4, 2017* -
## Writing Skills Part 4

1.When creating a writing plan,which of the following should come first? *A.Material that will capture the reader's interest B.The first section of the body of the essay C.A brief summary of the conclusion 2.Which two things must be accomplished by the

*asked on March 2, 2015* -
## algebra

What is the result when 2x^3 -9x^2 +11x-6 is divided by x-3? I have no idea how to even start solving this.

*asked on January 24, 2018* -
## biochemistry

Suppose the concentration of glucose inside a cell is 0.1 mM and the cell is suspended in a glucose solution of 0.01 mM. What would be the free energy change involved in transporting 10?6 mole of glucose from the medium into the cell? Assume T= 37 ?C.

*asked on February 4, 2017* -
## chemistry

what mass of acetylene, C2H2, will be produced from the reaction of 90 g of calcium carbide, CaC2, with water in the following reaction? CaC2+2H2O-->C2H2+Ca(OH)2

*asked on May 28, 2012* -
## statistic help

Z score for worlds tallest man- Bao Xishun is the worlds tallest man with a height of 92.95 inch(or 7ft,8.95 inch).men have heights with a mean of 69.6 in. And a standard deviation of 2.8 in. 1. Convert Boa's height to a z score? 2. Does Boa's height meet

*asked on September 18, 2011* -
## math

The graph shows the heights, y (in centimeters), of a plant after a certain number of weeks, x. Shania drew the line of best fit on the graph. A graph titled Plant Height shows Number of Weeks on x axis and Height of Plant in cm on y axis. The scales on

*asked on November 9, 2016* -
## college chemistry

What is the entropy change for the vaporization of 2.6 mol H2O(§¤) at 100◦C and 1 atm? dH= 40700 J/mol Answer in units of J/K

*asked on November 19, 2010* -
## Finance

Newdex has net income of $2,500,000 and 1,000,000 shares outstanding. It needs to raise $3,610,000 in funds for a new asset. Its investment banker plans to sell an issue of common stock to the public for $40 per share, less a spread of 5%. How much must

*asked on May 14, 2010* -
## social studies

which conclusion can you draw from the relationship between the Hasua people and Yorubas in Nigeria A Economic prosperity in the region has contributed to peace among ethnic groups B Trade has encouraged cultural exchanges between the two ethnic groups C

*asked on April 12, 2019* -
## social studies

South Africa gained its independence from Britain in 1910. why did this not lead to freedom and equality plz help

*asked on April 12, 2019* -
## CALCULUS. Check my answers, please! :)

The domain of f(x)=(1)/(sqrt(x^2-6x-7)) is (1, 7) [-1, 7] x > -1 or x < 7 ***{x < -1}U{x > 7} (-∞, -1]U[7, ∞) 2. In which of the following is y a function of x? I. y^2=9-x^2 II. |y|=x III. y=(sqrt(x^2))^3 I only II only III only ***I and III only I, II

*asked on October 5, 2013* -
## Math Problems

1. A costume designer made 10 costumes that each used 5.8 yards of fabric. If she had 238.2 yards of fabric to start with, about how much fabric does the costume designer have left? Write an equation and estimate the amount of fabric left. 2. A costume

*asked on December 7, 2015* -
## algebra

is 3.27 a rational or irrational number

*asked on August 6, 2014* -
## Check my CALCULUS answers please!

Any short explanation for things I got wrong would be great, too, if possible! Thanks in advanced! :) 8. Which of the following functions grows the fastest? ***b(t)=t^4-3t+9 f(t)=2^t-t^3 h(t)=5^t+t^5 c(t)=sqrt(t^2-5t) d(t)=(1.1)^t 9. Which of the following

*asked on October 7, 2013* -
## social studies

Outline Two reasons why Caribbean musicians may wish to promote their particular styles of music.

*asked on February 4, 2019* -
## Algebra

I need help learning to solve substitution. I have a problem that says solve the system by substitution -4.5x-2y=-12.5 3.25x-y=-0.75

*asked on October 8, 2017* -
## chemistry

The equilibrium constant for the following reaction is 5.0 at 100c. If an equilibrium mixture contains [No2]=0.50 M, what is the [N2O4]? 2No2(g) N2O4 (g) I do not understand if the Kc is 100c or where that plays in!

*asked on June 23, 2010* -
## biochemistry

Which statements about hydrogen bonds are correct? 1) Hydrogen bonds are the interaction between a hydrogen atom bonded to an electronegative element and the lone pair of electrons on a nearby electronegative atom. 2) The atom to which the hydrogen atom is

*asked on February 4, 2017* -
## science

how do you write the chemical equation for liquid pentanol (C5H12O) and gaseous oxygen ? Thanks ~Samantha~

*asked on November 29, 2010* -
## calculus

1.find the zeroes of the function f(x)=log4(x+1)+log4(4x-3) 2.which of the following is the equation c^(4d+1)=7a-b written in logarithm form

*asked on November 2, 2018* -
## Chemistry

The temperature of an object increases by 44.9 °C when it absorbs 3871 J of heat. Calculate the heat capacity of the object.

*asked on February 3, 2015* -
## english

2. Dickinson's poetry is often overshadowed by the biographical information we have on her. Do you think her poetry is enriched by knowing her secluded background or do you think the poems themselves are significant enough that they would have lasted

*asked on November 16, 2018* -
## math

which matrix represents the system of equations below -12x-13y+13z=15

*asked on January 24, 2018*