Chelsey
Popular questions and responses by Chelsey
chemistry! URGENT!!!
A gaseous mixture of O2 and N2 contains 30.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 365 mmHg?
asked on December 6, 2010 
Math
The U drive rent a truck company plans to spend 13 million on 320 new vehicles. Each commercial van will cost $35000, each small truck $30000, and each large truck $80000. Past experience shows that they need twice as many vans as small trucks. How many of
asked on February 1, 2014 
Algebra 2
A music teacher wants to determine the music performances of students. A survey of which group would produce a random sample. students in school band students attending the jazz concert students in every odd numbered homeroom There was choices about sports
asked on November 19, 2007 
Alegbra 2
Use the rational root theorem to list all possible rational roots for the equation. X^3+2x9=0. Use the rational root theorem to list all possible rational roots for the equation. 3X^3+9x6=0. A polynomial function P(x) with rational coefficients has the
asked on January 26, 2018 
organic chemistry
What orbitals overlap to create the CO bond in CH3OH? A. sp3sp3 B. ssp3 C. sp D. sp2sp3 E. ssp2 I know the answer is A because it's on a practice test and the answers are circled but I have no idea why it is that way. Please explain.
asked on September 17, 2012 
Geometry
1. Twyla's pet cat weighs 8lb. Her pet hamster weighs 12 ounces. What is the ratio of her cat's weight to her hamster's weight? 2. The nonright angles of a right triangle are in the ratio 1:5. Write the equation that could be used to find the measure of
asked on October 6, 2013 
organic chemistry
Methanol, CH3OH, contains a CO bond. In this bond, which of the following best describes the charge on the carbon atom. a.) 1 b.) +1 c.) uncharged d.)slightly negative e.) slightly positive the answer key says slightly positive but isn't it uncharged?
asked on September 18, 2012 
Physics
A 27pound meteorite struck a car in Peekskill, NY, creating a dent about 22 cm deep. If the initial speed of the meteorite was 550 m/s, what was the average force exerted on the meteorite by the car?
asked on February 15, 2011 
math
When a boy pulls his sled with a rope, the rope makes an angle of 70 with the horizontal. If a pull of 16 pounds on the rope is needed to move the sled, what is the horizontal component force?
asked on January 28, 2010 
chemistry
Which of the following set of quantum numbers (ordered n, ℓ, mℓ, ms) are possible for an electron in an atom? Check all that apply. 2, 3, 1/2 3, 2, 2, 1/2 5, 2, 1, 1/2 3, 2, 2, 1/2 4, 3, 4, 1/2 3, 2, 1, 1 4, 3, 2, 1/2 3, 3, 1, 1/2
asked on September 23, 2019 
Chemisrry
A 630. mL flask contains O2 at a pressure of 0.75 atm and a temperature of 20°C. What mass of O2 is present? I know you Use PV = nRT and solve for n = number of mols gas. Then n = grams/molar mass and solve for grams. 630 ml= 1l= 1000ml 0.63 L 20=293.15 k
asked on February 26, 2014 
Chemistry
A mixture of gases contains 0.65 mol of N2, 0.70 mol of O2, and 0.90 mol of He. What is the partial pressure of each gas (in atm and in torr) in a 25.0 L cylinder at 340 K? What is total pressure? I know you: Use mols each gas in PV = nRT and solve for p.
asked on February 26, 2014 
Chemistry
A 630. mL flask contains O2 at a pressure of 0.75 atm and a temperature of 20°C. What mass of O2 is present?
asked on February 26, 2014 
Geometry
1. AB has endpoints A(8,K) and B(7,3). The slope of AB is 5. What is K? 2. Two angles of a triangle measure 68 and 54. What is the measure of the third angle?
asked on July 27, 2013 
Physics
Tarzan swings on a vine 6.8 m long. The tension in the vine is 1200 N if he's moving at 2.9 m/s when the vine is vertical. What is his mass?
asked on October 5, 2012 
chemistry
calcululate the molality of CsCl in a 8% by mass aqueous solution. answer in units of m
asked on September 19, 2011 
chemistry
the pressure on a gas at73 Cis doubled, but its volume is held at constant. What will the final temperature be in degrees Cesius?
asked on November 14, 2010 
Honors Geometry
You work for a fencing company. A customer called, wanting to fence in his 1,320 squarefoot rectangular garden. He ordered 148 feet of fencing, but you forgot to ask him for the width and length of the garden (these dimensions will determine some of the
asked on February 21, 2008 
Math
Reasoning : When you estimate to determine if you have enough money , why should you underestimate the amount you have? Help!!!!
asked on August 23, 2018 
Geometry
I need help on lesson 1 unit 1 pairs of angles plzzzz help!!!!
asked on January 18, 2018 
physics
A ball is thrown vertically upwards from ground level hits the ground after 4secs, calculate the maximum hieght it reached during its journey.
asked on November 10, 2016 
communication skills
Explore the attributes of a well written academic essay
asked on September 27, 2016 
Math
A cylist has completed 25% of his journey.if the whole journey is 40km,how much of the whole journey has he completed
asked on September 20, 2016 
chemistry
C6O2H8, Ka = 1.7 x 105 calculate pka
asked on March 18, 2014 
Chemistry
What is the concentration of H3O+ in a solution with the following pH values. Enter your answer in scientific notation. a. 6.66 b. 13.40 c. 13.17 d. 2.39
asked on March 18, 2014 
Chemistry
At pH 3.85, which of the following is true? A.[lactic acid] > [lactate ion] B.[lactic acid] < [lactate ion] C.[lactic acid] = [lactate ion] At pH 11.61, which of the following is true? A.[lactic acid] = [lactate ion] B.[lactic acid] < [lactate ion]
asked on March 11, 2014 
Chemistry
Sometimes the basicity of a solution is reported using pOH (pOH = log[OH]). What is the a. [OH] if pOH = 1.90 b. [H3O+] if pOH = 12.94 c. pH if pOH = 9.70
asked on March 11, 2014 
chem
Calculate the pH of a solution in which a. [H3O+] = 7.8 x 107 M b. [H3O+] = 5.1 x 106 M c. [H3O+] = 6.1 x 105 M d. [H3O+] = 9.3 x 104 M
asked on March 11, 2014 
Algebra
Factor: 24x^33 I think you use the perfect cube formula which would be a^3+b^3=(ab)(a2+ab+b2) but not sure how to go about doing this.
asked on March 5, 2014 
Algebra
Erin has three more dimes than nickles and twice as many quarters as dimes. she has a total of $5.05 How many of each type of coin does Erin have 5.05= 2qd3dn A Piece of rope that is 63 meters long is cut into three pieces such that the second piece is
asked on March 5, 2014 
Algebra
Joe and Theresa want to paint their living room. From past experience they know that Joe can paint the room in 6 hours and Theresa can paint it in 10 hours. How long will it take them if they work together? Mower A can cut a field in 6 hours and Mower B
asked on March 5, 2014 
Chemistry help!
A sample of gas at a temperature of 37.0°C has a pressure of 725 torr and occupies a volume of 3.44 L. a. Use Boyle’s law to calculate the new pressure if the temperature is held constant and the volume is increased to 6.54 L. torr b. Use GayLussac’s
asked on February 26, 2014 
Chemistry
a. How many moles of N2 are present in a 1.00 qt flask that has a pressure of 425 torr at a temperature of 35°C? What is the mass in this na2? It would be much simpler to change quart to liters first, then torr to kpa PV=nRT n= PV/RT Temps in Kelvins, V
asked on February 26, 2014 
Chemistry
a. How many moles of N2 are present in a 1.00 qt flask that has a pressure of 425 torr at a temperature of 35°C? What is the mass in this na2? It would be much simpler to change quart to liters first, then torr to kpa PV=nRT n= PV/RT Temps in Kelvins, V
asked on February 26, 2014 
Chemistry
150.0 mL flask contains 740. g of N2 at 0°C. What is the pressure in atm. What is the pressure in torr? What is the pressure in psi? I know you have to do: n = grams/molar mass Then PV = nRT R in 0.08206 L.atm/mol.K gives P in atm atm x 760 = p in torr 1
asked on February 26, 2014 
Chemistry
At a temperature of 57oC, a gas inside a 5.30 L metal canister has a pressure of 4000 torr. If the temperature is decreased to 13oC (at constant volume), what is the new pressure of the gas? I know you use the formula (P1/T1) = (P2/T2)
asked on February 26, 2014 
Chemistry
At a pressure of 2.4 atm a balloon has a volume of 9.8 L. If the pressure is decreased to 0.96 atm (at constant temperature), what is the new volume of the balloon. I know you use the formula P1V1 = P2V2
asked on February 26, 2014 
Chemistry
A 630. mL flask contains O2 at a pressure of 0.75 atm and a temperature of 20°C. What mass of O2 is present? I know you Use PV = nRT and solve for n = number of mols gas. Then n = grams/molar mass and solve for grams. But I get the wrong answer
asked on February 26, 2014 
Algebra
At a pressure of 2.4 atm a balloon has a volume of 9.8 L. If the pressure is decreased to 0.96 atm (at constant temperature), what is the new volume of the balloon?
asked on February 26, 2014 
Chemistry
At a temperature of 57oC, a gas inside a 5.30 L metal canister has a pressure of 4000 torr. If the temperature is decreased to 13oC (at constant volume), what is the new pressure of the gas?
asked on February 26, 2014 
Chemistry
At a pressure of 2.4 atm a balloon has a volume of 9.8 L. If the pressure is decreased to 0.96 atm (at constant temperature), what is the new volume of the balloon?
asked on February 26, 2014 
Math
A pair of belted pulleys have diameters of 20 inch and 16 inch respectively.If the larger pulley turns at 2000 rpm, how fast will the smaller pulley turn.
asked on February 3, 2014 
Math
Lebron James scored 34 points on a combination of 21 foul shots (1 point) and two pointers. How many shots of each type did he make.
asked on October 20, 2013 
Geometry
find the slope of the lines passing through the points. (6,2), (1,3).
asked on July 27, 2013 
geometry
P(6,6)y=2/3x
asked on July 27, 2013 
Geometry
ABC is an obtuse triangle with m
asked on July 26, 2013 
Geometry

Geometry
a rectangular swimming pool has an area of double 1500ft. The rectangular pool is 50ft. The rectangular walkway that surrounds the pool is 4ft. How many feet of fencing do you need to surround the walkway?
asked on July 26, 2013 
geometry

Geometry

coustic poems
What is the acoustic poem for kilometre
asked on November 21, 2012 
Physics
When you're driving your 1200kg car, you go around a corner of radius 60.8 m. The coefficient of static friction between the car and the road is 0.67. Assuming your car doesn't skid, what is your speed if the force exerted on it is 5800N?
asked on October 5, 2012 
Physics
An object of mass 1.4kg is placed 12.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the object remains fixed on the turntable until a rate of 36 rpm is reached, at which point the object
asked on October 5, 2012 
Chemistry
Using the equation 4Fe + 3O2 > 2Fe2O3, calculae the total mass of oxgen needed to react wih all of 0.55 g of iron.
asked on September 21, 2012 
math
In Exam Figure 7, AA′ = 33 m and BC =7.5 m. The span is divided into six equal parts at E, G, C, I, and K. Find the length of A′B. Round your answer to two decimal places.
asked on February 10, 2012 
math
how to write the rate as a unit rate?
asked on November 29, 2011 
physics
A 5.0 kg block with a speed of 2.8 m/s collides with a 10 kg block that has a speed of 2.0 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.5 m/s. What is the velocity
asked on October 30, 2011 
PreCalc
22
asked on April 10, 2011 
algebra
factor: x^211x+19=5
asked on August 8, 2010 
MathCalculus
i have to questions that just need to be checked on to see if i got them right. Lim x>infinity for both problems 10/x+10 is number one i got 0 for this one. or is it does not exist. lim x>infinity 6x/6x+5 for this one I got One. (1) is that correct.??
asked on March 23, 2010 
easy cal Q
lim x>a x^2+a^2/x+a I know this equals (a) but I don't know how to explain my answer.
asked on March 23, 2010 
Philosophy  Ethics
I asked a question yesterday about Immanuel Kant, Grounding of the Metaphysics of Morals, and now I have a new question. I am writing a paper on how Kant is saying that inclinations shouldn't be involved in moral decisions, because inclinations do not lead
asked on March 4, 2009 
Philosophy  Ethics
I'm trying to write a 23 paged essay about a topic that Immanuel Kant covers in his book Grounding for the Metaphysics of Morals. My working thesis is 'Univeral law of morality can not be based on anything other than duty.' But I don't know if I should
asked on March 3, 2009 
Science
That boy shot up five inches in only one year
asked on August 17, 2008 
Grammar
I recommend to him that he asks his guide for more information about the museum because it is marvellous. I recommend to him to ask his guide for more information about the museum because it is marvellous. This one has me stumped.
asked on June 4, 2008 
spanish
Does anybody know what a synoymn for respeta is and what respeta means?
asked on May 14, 2008 
spanish
I am not quite sure if mentir is an irregular verb but I need help conjugating it innto the he/she form. Could you help me out?
asked on May 14, 2008 
English  Proof reading
Could someone just proof read this for me and help me make sure the grammar and spelling is correct? Macbeth or the White Witch Uh... What was the Question? I have decided to compare Macbeth to the White Witch from “The Chronicles of Narnia: The Lion,
asked on April 29, 2008 
Geometry
A cone is formed by revolving which of the following figures about a line containing one of its edges? A. Rectangle B. Right Triangle C. Semicircle D. Hexagon
asked on April 10, 2008 
Science/Math
How do you convert 28cm/s  km/hr^2?
asked on February 29, 2008 
Honors Physical Science
Did the object have a greater acceleration from 0s8s or from 9s  16s? What was the difference between the 2 accelerations? I figured out that the acceleration for 0s  8s is 3cm/s and that the acceleration from 9s  16s is 3.28cm/s but i don't know
asked on February 29, 2008 
MATH
what 3D shape as 20 congruent equilateral triangles as faces
asked on January 23, 2008 
Algebra 2
Write an equation for the nth term of the geometric sequence: 12,4,4/3 I had a_n=12(3)^(n1) but that is not a choice on the multiple answers they have = 12(1/3)^(n1) = 12(1/3)^(n1) = 12(1/3)^(n+1) = 12 (1/3)^(n1)
asked on November 17, 2007 
science
when you make the proper adjustments, your sub begins traveling with the currents of the thick, yellow jelly and heading toward you. You try to avoid the gaint bag, but the cellular current races you straight toward it. The bag splits apart for a second
asked on September 19, 2007 
Science
Show me how to choose an element and draw it's atomic model Labeling all the parts and particles
asked on September 17, 2007

Chemistry
Which of the following set of quantum numbers (ordered n, ℓ, mℓ, ms) are possible for an electron in an atom? Check all that apply.3, 2, 3, 1/2 3, 2, 2, 1/2 5, 2, 1, 1/2 3, 2, 2, 1/2 4, 3, 4, 1/2 3, 2, 1, 1 4, 3, 2, 1/2 3, 3, 1, 1/2
posted on September 23, 2019 
Math
should you underestimate so that if you dont have enough you should just underestimate just incase? like you wanna spend 6.00 but you dont know know how much you have so you get stuff that are below it?? if that makes sense
posted on August 23, 2018 
Math
I like it but if you don´t 83 then you are not smart at all?J.K
posted on May 10, 2018 
art
u da best JAZZZZMIN!
posted on April 17, 2018 
Grammer
The simple subject in the sentence
posted on October 2, 2017 
Reasoning
45/2= 22.5 So she is 22 an a half years old.
posted on September 27, 2017 
College Algebra
Qw
posted on June 1, 2016 
acrostic poem
I need help on a chlorine gas acrostic poem
posted on November 3, 2014 
Algebra
Thank you so much I really appreciate you helping me set up these problems, again thank you!
posted on March 5, 2014 
Chemistry
I used what you said but I'm still getting the wrong answer. I'm sorry I really struggle in chemistry
posted on February 26, 2014 
Chemistry
I really struggle in chemistry sometimes I know the formulas but I don't know how to put the correct numbers where they need to be .
posted on February 26, 2014 
Chemistry
630 ml= 1l= 1000ml 0.63 L 20=293.15 k 0.75*0.63=n*0.0821*293.15 =1687.13002
posted on February 26, 2014 
Chemistry
1L=1.06qt 1.00 / 1.06 = 0.94339623 425 torr = 56.7 kpa 35= 308.15 k 56.7/0.0821*308.15 = 212814.921
posted on February 26, 2014 
Chemistry
I know how to set the problem up but when I go to solve I get the wrong answer can you help me please?.
posted on February 26, 2014 
Chemistry
I know how to set the problem up but when I go to solve I get the wrong answer can you help me please? I really need help
posted on February 26, 2014 
Chemistry
I know how to set the problem up but when I go to solve I get the wrong answer can you help me please?
posted on February 26, 2014 
easy cal Q
Thanks! Exactly what I was looking for.
posted on March 23, 2010 
physics
A) m*v^2=kinetic energy m*72^2=7.6*10^7 m*(7.6*10^7)/(72^2)=14660.5kg B) p=w/t p=(7.6*10^7)/2=3.8*10^7 p=38000000 watts
posted on March 16, 2010 
Philosophy  Ethics
Thank you so much for all your help! :) I apperciate it soo much!! And I agree, he basically says that the good will is the only way humans will have moral worth, Duty + ~Inclination = Good Moral Worth. But then he says there is no way to tell if people
posted on March 4, 2009 
Philosophy  Ethics
Is moral obligation more important to Kant then the Kingdom of all ends? This is what is tripping me up. I don't know if I can find enough supporting evidence on how experience,and inclinations play no role in the forming an universal law. However, when he
posted on March 3, 2009 
English  Proof reading
Well.. it IS written by a freshman... and not to be mean.. I just wanted to know if it had any gramatical errors
posted on April 30, 2008 
English  Proof reading
So there you have it. Clearly the question asked in the beginning which was the most powerful, The White Witch or Macbeth. The Witch was stated to be the most powerful. From everything that has been said, it’s leaning toward the Witch being the most
posted on April 29, 2008 
English  Proof reading
ah.. the rest of it never posted The first question that came to mind was; What are the reasons? Let’s start off with Macbeth first. Macbeth doesn’t have an army or a “Magic Wand”, so his powers wouldn’t possibly as great as the White Witches.
posted on April 29, 2008 
A Cell Crossword Puzzle (science)
tell me the answers
posted on April 28, 2008 
Geometry
Okay, this confirmed what I thought it was. Thanks
posted on April 10, 2008