Posts by christine
Total # Posts: 564

Chemsitry
Three unknown solutions were prepared by pipetting 15.00 mL of an unknown nickel solution into a 200.00 mL volumetric flask and diluting to the mark. Then three samples were prepared from this dilute unknown solution by pipetting 5.00 mL of the dilute solution into a 25.00 mL ... 
Chemistry
Three unknown solutions were prepared by pipetting 15.00 mL of an unknown nickel solution into a 200.00 mL volumetric flask and diluting to the mark. Then three samples were prepared from this dilute unknown solution by pipetting 5.00 mL of the dilute solution into a 25.00 mL ... 
Algebra
I need help with this question: write an equation g(x) for when the parent function f(x) = x is translated one unit to the left and two units up, opening downwards, and vertically stretched by a scale factor of 5. Thank you!!! 
physics
At some instant, a particle traveling in a horizontal circular path of radius 3.30 m has a total acceleration with a magnitude of 18.0 m/s2 and a constant tangential acceleration of 12.0 m/s2. Determine the speed of the particle at this instant and (1/8) revolution later. ... 
math
Find the least and greatest possible original numbers: ROUNDED PLACE is Tens, ROUNDED NUMBER is 460. What is the Least number and the Greatest number? 
government
what is the separation of powers between the legislative and the executive branch regarding the budget. 
chemistry
A balloon is filled with hydrogen gas. reaction is Fe(s) + H2SO4(aq) > FeSO4(aq) + H2(g). The volume of the ballon was 4800 m cubed and the loss of hydrogen gas during filling was estimated at 20.% What mass of iron splints and 98% by mass H2SO4 were needed to ensure ... 
Physics
An object with a mass of (2.844x10^1) kg is subjected to a force of (3.964x10^3) N directed at an angle of (6.374x10^1) degrees from the x axis. A second force of (1.3x10^2) N acting in the negative X directions is also applied to the object. To two significant figures what is... 
riddle
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Math  Algebra (Percents and Ratios)
At a little league game, three fourths of the people in the stands were kids amd the rest were parents. If the ratio of dad to moms is 3:4, what percent of the people attending the game were moms? (Give answer to the nearest percent.) 
College Chem 2
40 mL of o.5M sulfuric acid is neutralized by 60mL of a solution of sodium hydroxide of unknown concentration. What is the concentration of sodium hydroxide? Please show the work 
Math
The product of my numerator and my denominator is divisible by 2 .my denominator and my numerator differ by 3. My numerator is an even number .my denominator is a prime number.I am:______ 
Math
The answer is 1/3. but I don't know how to get the answer. 
Math
Two different numbers are randomly selected from the set ${  2, 1, 0, 3, 4, 5}$ and multiplied together. What is the probability that the product is $0$? 
Finance
Ngata Corp. issued 19year bonds 2 years ago at a coupon rate of 9.6 percent. The bonds make semiannual payments. If these bonds currently sell for 107 percent of par value, what is the YTM? 
Math  Aglebra One (Ratios)
my grandfather has a huge coin collection of silver dollars and 50cent pieces. He promised to give one fourth if his collection to the first of his grandchildren who can figure put the total value of his coins. The only cares he will give are these: There are 133 more silver ... 
SS (Social Studies)
Answers for what? ^Anonymous 
SS (Social Studies)
Not information. Imagination** 
SS (Social Studies)
I have been trying for days to use my information! This assignment is extremely overdue. Please help! 
SS (Social Studies)
I'm working on a social studies project and I really need help on it. The question asks to list three benefits of farming. My benefits are: 1) A stable Lifestyle 2)Stable Food Source 3)A Source For Trading I just need help to create slogans for them! 
Chemistry
Write the balanced equations for the reactions: a) Reduction of Ag+ Ions with metal Fe. b) Oxidation of metal Mg with Cu2+ ion. 
MATH HELP!!
Consider the three points A(2,3,1) B(1,2,3) C(7,4,6) a) Show that ABC is a right triangle. b) Calculate the area of this triangle. c) Find the coordinates of the center of the circle circumscribed about triangle ABC 
CHEMISTRY HELP
DrBob222 
CHEMISTRY HELP
The mass of NH3 is 8.5 grams And the number of moles of NH3 that was formed was 5 mol (n) Any help? :) 
CHEMISTRY HELP
Reaction: 1/2N2 + 3/2H2 > NH3 Delta H = 46Kj/mol 1) Find delta H n(NH3)formed=5 mol. M(NH3=8.5g) 2) Find delta H a)3 mol H2 + 3 mol N2 b) 3 mol H2 + 0.5 mol N2 M NH3 = 17 g/mol ??? 
Chemistry (Help!)
Reaction: 1/2N2 + 3/2H2 > NH3 Delta H = 46Kj/mol 1) Find delta H n(NH3)formed=5 mol. M(NH3=8.5g) 2) Find delta H a)3 mol H2 + 3 mol N2 b) 3 mol H2 + 0.5 mol N2 M NH3 = 17 g/mol ??? 
differential calculus
A bulldozer costs $120,000 and each year it depreciates 8% of its original value. Find a formula(equation) for the value V of the bulldozer after t years. 
Biochemistry
An enzymecatalyzed reaction was carried out in a 0.2M �Tris� buffer, pH 7.8. As a result of the reaction, 0.03 mole/liter of H+ was produced. (pKa of Tris =8.1) (a) What was the ratio of Tris+ (conjugate acid) / Triso (Conjugate base) at the start of the ... 
PHYSICS
a mass of 3kg rests on smooth horizontal table connected by a light string passion over a smooth pulley at the edge of the table to another mass of 2kg hanging vertically. when the system is released from rest with what acceleration do the masses move and what is the tension ... 
MATH
My ones digit is 1.My tens digit is 2 ore than my ones digit.My thousands digit is the difference when my tens digit is subtracted from my hundreds digit.what number am I? 
math
write the largest 4digit number using the digits 9 and 8.Use each digit twice 
PHYSICS
A stone is dropped from the top of a cliff and one second latter a second stone is thrown vertically downward with a velocity of 20m/s. How far below the top of the cliff will the stone overtake the first? 
PHYSICS
A football is kicked from the ground at an angle 30degree above the horizontal with an initial speed 18m/s and directly towards the goalkeeper. If the goal line is a horizontal distance 25m away calculate the vertical height at which the ball crosses the goal line if not ... 
PHYSICS
A ball is dropped onto the floor from a height of 20m. It rebounds to a height of 15m. If the ball was in contact with the floor for 0.01sec what was its average acceleration during the contact take g=10m/s 
PHYSICS
A player kicks a ball at an angle of 37degree with the horizontal and with an initial speed of of 48ft/s. A second player standing at a distance of 100ft from the first in the direction of the kick starts running to meet the ball at the instant it is kicked. How fast must he ... 
chemistry
How many milliters of a 6.ooM HCl solution are required to react with 21.0 grams of Mg? I'm so confused. I know how to get the Molar mass of Mg and HCl but, does that even matter here? 
math
according to a map the distance between hilltop and valleyfloor is 1 1/4 inches. if the map uses a scale of 1/4 inch to represent 1 mile inches what is the actual distance in mile from hilltop and valleyfloor? 
math !
1.65m is the right answer 
Math
(2xy^2+16x^2y20xy+8) / (4xy) 
math
the model of a car is 4 1/8 inches wide. is three inches ok the model represents five feet what is the actual width of the car 
math
what is 5(4x+2)+3(5x2) 
Language Arts
Yep I finished my quick check and it’s A 
Language Arts
Which of the following citations from The Watsons Go to Birmingham1963 illustrates how the setting affects Byron? A. The way Byron kept his head down and was smiling and saying “Yes, ma’am” this and “No, ma’am” that, it looked like he had ... 
Physics
A solid is completely submerged in a particular liquid and floats at a constant level.when the temperature of the liquid in the solid is raised, the liquid expands more than the solid. will this make the solid rise upward remain floating or sink explained 
Math
Leah and Sam were playing a game with two dice. They took turns rolling the dice and finding the products of the numbers rolled. To make the game fair, if Leah rolls a certain product she gets 2 points. If Sam rolls a certain product, he gets 3 points. What might the products ... 
Science:Biology
What are some unusual characteristics of food webs in agroecosystems? 
Ecology*Urgent*
Why is Biochar an efficient way to store carbon? *Biochar is basically rich soil with charcoal* 
physics
What are the speed and acceleration (increase/decrease or remain constant) of a ball rolling down a a) straight hill, b) concave hill c) convex hill Can someone explain why they are, not just the answers? 
Algebra 1 help
Not sure if you still need help with this... but here are the correct answers: 1)C 2)D 3)B 4)D 5)D 
Algebra
(11*5)+6=$ 
Geometry
a triangle has an area of 35 square inches, and its base is 3 inches more than it's height. Find the base and height of the trianlge 
physics
the following point charges are placed on the xaxis: +2.0μC at x=20cm,3.0μC at x=30cm and 4.0μC at x=40cm. What is the potential at x=0? 
physics
two point charges +q and q are separated by a distance d. aside from infinity, where else is the potential due to these two charges 0? 
chemistry
at 25 celcius, how many dissociated OH ions are there in 8.0x10^1 L of aqueous solution with pH 4.73? 
physics
A truck accelerates uniformly from rest to 21.5m/s in 5.7sec along a level stretch of road. Determine the average power required to accelerate the truck for the following values of the weight (ignore friction) a) 1.00x10^4 N b) 1.45x10^4 N I used constant acceleration equation... 
Biology
The LEPR gene that encodes for the leptin receptor protein is approximately 23 kilo base pairs long. The receptor protein consists of 896 amino acids. A man has a mutation in an LEPR allele. Analysis of his DNA sequence for this lepr allele shows that there is a 5' GTA to ... 
Physics
I'm guessing the answer sheet has some mistake? It says the height is 9.6m , which I can't seem to figure out how they got that number! :s 
Physics
Skier A of mass 71kg slides down a slope and makes a completely inelastic collision with Skier B, who is stationary, and has a mass of 55kg.Immediately after the collision both skiers have a speed of 5.8m/s. a)Find the speed of skier A immediately before the collision. (I got ... 
Physics
Thank you! 
Physics
A motorcycle rider plans to make a jump off a ramp. If he leaves the ramp with a speed of 38.0m/s and has a speed of 36.3m/s at the top of his trajectory, determine his max height above the end of the ramp. Ignore friction and air resistance. i got 6.45m but i really don't... 
geometry
The length of a rectangle is 4 times its width. If the perimeter of the rectangle is 70 ft., find the area. 
Chemistry
Write the dissociation equation for iron(II) ammonium sulfate hexahydrate in water . Fe(NH4)2(SO4)2 * 6H2O > __?________ I know dissociate means to take apart so for example; NaCl would look like Na^+ + Cl^ And another one like: Fe2(SO4)3 would look like 2Fe^+3 + 3SO4^... 
Chemistry
Write the dissociation equation for iron(II) ammonium sulfate hexahydrate in water . Fe(NH4)2(SO4)2 * 6H2O > __?________ I know dissociate means to take apart so for example; NaCl would look like Na^+ + Cl^ And another one like: Fe2(SO4)3 would look like 2Fe^+3 + 3SO4^... 
science
How fast does a kHz travel per second? 
Physics
what is its velocity when it returned to the elevation from where it was thrown? 
Math
The Wildcats basketball team scored 18 points in the first half of the game. All the points came from either 2 or 3 point baskets. If a total of 8 shots were made ( some two pointers and some three points), how many of each type of shot were made? 
physics 1401!
A closedend tube is evacuated and placed with its open end beneath the surface of a reservoir of water. The water rises to a height of 9.5 m. If the density of water is 1000 kg/m^3, what is the pressure at the bottom of the column of water? 
physcial science
What are the wavelength limits of the audible range of the sound spectrum? (Use the speed of sound in air. The speed of sound in air is 344 m/s. The audible range of the sound spectrum contains frequencies as low as 30 Hz and as high as 25 kHz.) 
physcial science
Picnickers see a lightning flash and hear the resulting thunder 7.9 s later. If the storm is traveling at a rate of 20. km/h, how long, in minutes, do the picnickers have before the storm arrives at their location? 
Math
102/3p=42 I think the answer is p=63 
How do you delete a question here?
is there a way to change my name? 
How do you delete a question here?
I really need to delete it for school 
How do you delete a question here?
is there a way to delete my name off of it? 
english/polsci essay excerpt edit
as in whole papers 
english/polsci essay excerpt edit
Hi Do you edit papers at all? 
english/polsci essay excerpt edit
Can someone edit this? Also, does anyone edit whole papers? (Essay redacted per request from original poster.) 
Math
3(9+x)=33 
math
Angle of elevation is 15 degrees and we're trying to solve for the hypotenuse of the right triangle given the adjacent is 7.11 m. We could use primary trig ratios to solve  COS. Let x represent the length of the ramp (hypotenuse) Cos15= ADJACENT/HYPOTENUSE Cos15= 7.11/x x... 
Algebraic expression
Translate this phrase into an algebraic expression. Five more than the product of 19 and Mabel's height Use the variable m to represent Mabel's height. 
Calculus
3 .079m 
Chemistry
A 5.00 L flask with mass of 463.873 g is filled with Ar gas to 3 atm pressure at 292 k. (19 celsius + 273) what is the mass of flask and gas? 
physics
a 20newton object Is pulled along a horizontal surface at a constant velocity by a 30N force. What is the coefficient of friction 
Delete Question
Hi can someone please delete one of my questions? 
Math
Kool Klothes has determined that the revenue function for selling x thousand pairs of shorts is R(x) = 5x^2 + 21x. The cost function C(x) = 2x + 10 is the cost of producing the shorts. a) How many pairs of shorts must the company sell in order to break even 
math
An aeroplane leaves a runway and climbs at an angle of 15 degrees. After flying 800 meters, how high is it above the runway? 
essay edit excerpt
can someone edit this? The Monroe Doctrine allowed the president to extend his diplomatic power by specifying that he can provide for defense against other nations. Prior to this document’s establishment, the Neutrality Proclamation set the skeleton of the President’... 
Chemistry Need Help
I can solve it now. Sorry about the post. 
Chemistry Need Help
How many grams of baking soda, NaHCO3, are needed to react with 125 mL of stomach acid having an HCl concentration of 0.05984 M? The reaction is NaHCO3(aq) + HCl(aq) → NaCl(aq) + CO2(g) + H2O(l). Do I need to chenage mL to L first? I'm really stuck with this question... 
Chemistry
The density of water at 30*C is 0.9956g/mL. If the specific gravity of acetic acid is 1.040 at 30*C, what is the density of acetic acid at 30*C? 
math NEED HELP
2x+5 x+4    x^2+3x+2 x^2+3x+2 i keep getting x+9  (x+1)(x+2) 
physics 11
m1 = 1000kg vi1 = 25m/s m2 = 2250kg vi2 = 10m/s vf = ? m/s (m1*vi1)+(m2*vi2)=(m1+m2)vf vf=[(m1*vi1)+(m2*vi2)]/ [m1+m2] vf=[(1000*25)+(2250*10)]/[1000+2250] vf = 0.769m/s OR vf = 0.769m/s south 
8th grade math
iPhone is designing a smart phone with a square screen. The area of the screen will be 169 cm with an exponent of 2. What is the height of the screen? I think the answer is 13. Am I correct. 
Math
In the Atlantic ocean off the coast of Bermuda lies a 500,000 square mile region called th Bermuda triangle . If the sides of the triangle are about 959 miles, 1,011'miles, and , 1,033, prove whether or not the Bermuda trian is a right triangle ? 
math
c is correct it is 6:4 
essay edit excerpt
how do I expand on this? My academic prose has exhibited creatively reestablishing an original element with new messages through “A Closer Look: Analyzing Tangled (2012) and Its Deeper Critique of "Rapunzel" (1812). Firstly, I state that “most would ... 
essay excerpt edit
Can someone edit this My writing has exhibited creativity by introducing a new perspective of stereotypical conventions that resulted in increased cognition through “A Closer Look: Analyzing Tangled (2012) and Its Deeper Critique of "Rapunzel" (1812). Firstly, I... 
essay excerpt edit Does this flow/make sense?
Creativity was initially understood as the process that, appropriate to its root, created something new. As such, it is defined by the Oxford English Dictionary as "the quality of creating" or "cause[ing a new element] to exist,” (Creativity)." It has ... 
essay excerpt edit
Can someone edit this? I already edited it but it would still be helpful to get feedback. Although Benjamin does not explicitly define creativity in his article "The Work of Art in Mechanical Reproduction" he does make mention of "mechanical reproduction," ... 
Essay Excerpt Edit
Can someone edit this? Please be forewarned that its a first draft so I am aware that it is not developed yet. Any feedback would help a lot. Clearly, Jason Russell's Kony 2012 campaign proves how YouTube has altered our understanding of creativity from the change that ... 
chemistry
why might consuming more of daily rni of a vitamin or mineral be harmful