Sunday
August 2, 2015

# Posts by Jena

Total # Posts: 97

chemistry
Consider the following reaction. SO3(g) + H2O(l) → H2SO4(aq) A chemist allows 60.9 g of SO3 and 11.1 g of H2O to react. When the reaction is finished, the chemist collects 54.4 g of H2SO4. Determine the limiting reactant, theoretical yield, and percent yield for the ...
March 20, 2015

math
The sum of the first n odd number is n^2. The sum of the first 30 odd numbers is A. 60 B. 90 C. 300 D. 900 Thank you for the help in advance =)
July 19, 2014

math
The total mass of three identical boxes is 28.05 kilograms. What is the mass, in kilograms, of each box?
February 23, 2014

Math
y=1/2x+3 Slope? x-intercept y-intercept How do I graph this?
January 11, 2014

math
how do I graph- y=-3x-6
January 10, 2014

math
Y=-3x-6 Slope- x-intercept- y-intercept How do I graph this?
January 10, 2014

Math
Carol Miller went to Europe and forgot to pay her \$820 mortgage payment on her New Hampshire ski house. For her 52 days overdue on her payment, the bank charged her a penalty of \$23. (assume 360 days). What was the rate of interest charged by the bank?
June 22, 2013

Chemistry
Convert 29.8 atm into torr I did this 29.8(1/760) and got 22648 but its not going online as correct
October 25, 2012

Chemistry
Convert 29.8 atm into torr I did this 29.8(1/760) and got 22648 but its not going online as correct
October 24, 2012

Chemistry
Yes its correct, but how about he mass of NaHCO3 in the tablet assuming the mass of the tablet is 3.50 g
October 19, 2012

Chemistry
HCl is added to NaHC03 .
October 19, 2012

Chemistry
I did the equation of the % mass but its wrong
October 19, 2012

Chemistry
reaction between NaHCO3 and HCl
October 19, 2012

Chemistry
Performing the same experiment described on your lab manual, a student used a 0.358 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.102 g. Based on this result, answer the following questions: Determine the mass of NaHCO3 that produced the CO2 in the experiment...
October 19, 2012

Chemistry
a student used a 0.358 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.102 g. Based on this result, answer the following questions: Determine the mass of NaHCO3 that produced the CO2 in the experiment. Determine the % mass of NaHCO3 in the sample. Determine the ...
October 18, 2012

Chem Hmwrk
For the reaction HCl + AgNO3 → ,write the balanced formula equation
October 11, 2012

Human Services
I am doing an assignment on program planning and evaluation. In the last section of the essay I am supposed to identify the technical aspects that my fictional domestic abuse recovery organization may run into. I do not understand what a technical aspect is. Can anyone explain...
August 2, 2012

Algebra
How?? What are the equations?
April 16, 2012

Algebra
What is the domain and range of the equation y=-x^2-4x-7?
April 16, 2012

Algebra 1
Whats: -3 < j + 2 < 7
February 14, 2012

math
A = B*2^-ht B = initial Amount t = time h = half-life Is that the whole question?? Becuase that really doesn't make sense. If you give me the whole question I can give you can answer.
November 8, 2011

algebra
Find integer bounds for the roots of the following equation: 3x^5-11x^4-2x^3=38x^2-21x-15
November 8, 2011

Math 116
No I think it would be (9, 14).
September 21, 2011

Algebra
What are intersections and unions (in algebra). Also, what are complements? And what does MATH stand for in terms of sets? Please answer quickly. Thanks!
September 21, 2011

Math
Oh yes sorry I got confused...don't listen to me...
September 21, 2011

Earth Science
Ok thank you. At first I was confused, but then I realized that I was mixing up quantitative and qualitative. It makes sense now. Thanks!
September 18, 2011

Earth Science
What are FIVE tools that we use to help us extend our senses when making quantitative observations?
September 18, 2011

Chemistry
If you are given 46 grams of magnesium how many grams of hyfrogen will be produced?
May 25, 2011

math- check me
(-3)/(5)y=-15 Does y=25
February 15, 2011

math- check me
Sung rented a truck for one day. There was a base fee of \$17.99, and there was an additional charge of .90 cents for each mile driven. Sung had to pay \$253.79 when he returned the truck. For how many miles did he drive the truck? \$253.79=\$17.99+.90 -\$17.99 \$\$238.80=.90 divide ...
February 15, 2011

Math
I see what I did, I put a neg in front when it should have been and carried it through. Thanks
February 15, 2011

Math
h(x)=(2-2x^2)/-2 h(-2) I get (-2-2(-2)^2)/-2 (-2-2(4)/-2 6/-2=-3 h(-2)=-3
February 15, 2011

Math
g(x)=-5+sqrt(x-1) g(4)=-5+sqrt(4-1) is the answer -5+sqrt3
February 15, 2011

I don't get a value for b, What am I missing?
February 15, 2011

Find the equation of the line. find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (-8, -6) and (x2, y2) = (0, 0) slope 0-(-6)/0-(-8)= 3/4 how would I write it? y=3/4x or y=3/4x+0 ?
February 15, 2011

Algebra
Restated:For each equation, determine whether its graph is symmetric with respect to the -axis, the -axis, and the origin. 4y^4+24x^2=28 and y=1/(x^2+5) Check all symmetries that apply x-axis,y-axis,origin or non of the above.
February 4, 2011

Algebra
I get that the second equation x-axis. Is that right?
February 4, 2011

Algebra
Sorry y=1/(x^2+5)
February 4, 2011

Algebra
For each equation, determine whether its graph is symmetric with respect to the -axis, the -axis, and the origin. 4y^4+24x^2=28 and y=1/x^2+5 Check all symmetries that apply x-axis,y-axis,origin or non of the above.
February 4, 2011

Algebra
thanks
February 4, 2011

Algebra
February 4, 2011

Algebra-still need some help
I get (-inf,-5/2)U[-6,infin) but it doesn't look right
February 3, 2011

Algebra-still need some help
Homework Help Forum: Algebra Posted by Jena on Thursday, February 3, 2011 at 7:32pm. Find the domain of the function. f(x)=(sqrt x+6)/(-2x-5) Write your answer as an interval or union of intervals. Algebra - David, Thursday, February 3, 2011 at 7:42pm (-6,-5/2)and(-5/2,...
February 3, 2011

Algebra
I'm lost
February 3, 2011

Algebra
Find the domain of the function. f(x)=(sqrt x+6)/(-2x-5) Write your answer as an interval or union of intervals.
February 3, 2011

Algebra desperate
February 2, 2011

Algebra
February 1, 2011

Algebra
February 1, 2011

Algebra-problem restated
February 1, 2011

Algebra
February 1, 2011

physics
how do you find time?
January 9, 2011

physics
A cat chases a mouse across a 1.7 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 2.1 m from the edge of the table. The acceleration of gravity is 9.81 m/s2 . What was the cat’s speed when it slid off the table? Answer ...
January 9, 2011

physics
A cat chases a mouse across a 1.7 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 2.1 m from the edge of the table. The acceleration of gravity is 9.81 m/s2 . What was the cat’s speed when it slid off the table? Answer ...
January 9, 2011

physics
An autographed baseball rolls off of a 0.63 m high desk and strikes the floor 0.46 m away from the desk. The acceleration of gravity is 9.81 m/s2 . How fast was it rolling on the desk before it fell off? Answer in units of m.
January 9, 2011

physics
A girl delivering newspapers travels 2 blocks west, 10 blocks north, then 4 blocks east. What is the magnitude of her resultant dis- placement? Answer in units of blocks. 077 (part 2 of 3) 10.0 points Find the direction (measured from due east, with counterclockwise positive) ...
January 9, 2011

physics
what is the vertical component?
January 9, 2011

physics
A cat climbs 20 m directly up a tree. What is the horizontal component of the cat’s displacement? Answer in units of m.
January 9, 2011

physics
A freight train has a mass of 3.2 × 107 kg. If the locomotive can exert a constant pull of 7.1 × 105 N, how long would it take to increase the speed of the train from rest to 74.6 km/h? (Disregard friction.)
January 9, 2011

chemistry
I am in need of help about this specific heat question. A 100.0g sample of aluminum released 1680 calories when cooled from 100.0 degrees C ti 20.0 degrees C. What is the specific heat of the metal? I tried setting it up: 1680 cal ________________________ 100.0 (100.0 *C- 20.0...
September 27, 2010

english
Are there any absolutes regarding rights and wrongs in the K-8 educational setting? Give examples to support your answer.
June 16, 2010

chemistry
How much energy is released when 1.9 kg of diethyl ether freezes? In kj
May 4, 2010

Geometry
A Regular Octagon with apothem of 9ft
April 15, 2010

math
Cola Company is offering its preferred customers a 25% discount on its most popular product normally listed at \$40 each. a) What is the net price of each product to Cola Company's preferred customers? For full marks your answer(s) should be rounded to the nearest cent. b...
March 21, 2010

College Chemistry
thank you Dr. Bob!!! :)
March 1, 2010

College Chemistry
I am trying to figure out how many minutes are required for sunlight to travel from the Sun to Earth? Assuming the sun is 93,000,000 miles from Earth and that sunlight travels at 1.86x10 to the 5th power miles per second. These things are so tricky, i know i have to convert ...
March 1, 2010

Milky Way
trying to google concept maps....try images if that help! best of luck!
March 1, 2010

College Chemistry
thank you so very much for your help!
March 1, 2010

College Chemistry
here is the question: A sapphire gemstone contains 52.7% aluminum, 47.% oxygen, and traces of titanium. If the saoohire was found to contain 0.155g of oxygen, what is the mass of the gemstone? i think this is a precent unit factor but i dont know how to set it up. PLEASE HELP ME!
March 1, 2010

math
Jeremy has a fish tank that has a 40-cm by 70-cm rectangular base. The water is 25 cm deep. When he drops rocks into the tank, the water goes up by 2 cm. What is the volume in liters of the rocks
February 8, 2010

math
On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 35 questions correct. What was the percent of increase?
December 16, 2009

math
Use a Venn diagram to determine whether A > (B < C) 5 (A > B) < C for all sets A, B, and C.
November 28, 2009

math
Consider the set of northwestern states or provinces {Montana, Washington, Idaho, Oregon, Alaska, British Columbia, Alberta}. If a person chooses one element, show that in three yes or no questions, we can determine the element.
November 28, 2009

College Chemistry
Are my calculations correct of i came up with 50.71g of CaH2 to the question, "How many grams of are needed to generate 54.5 of gas if the pressure of is 815 at 22?"
November 7, 2009

Math
12r-4r=48r=
October 18, 2009

Chemistry
How to find the mass of Oxygen that displaces water from the in the decomposition reaction of potassium chlorate using manganese 4 oxide as a catalyst. Am I to use stoichiometry or the combined gas law equation P1V1/T1=P2V2/T2
March 23, 2009

math
what is the title of this picture?
January 21, 2009

PHYSICS
A baseball is hit with a horizontal speed of 16 m/s and a vertical speed of 16 m/s upward. What are these speeds 5 s later? horizontal speed ?? m/s vertical speed ?? m/s
March 8, 2008

Chemistry
What is the molarity of a solution containing 20 grams of NaOH in 500 milliliters of solution? a-0.04M b-0.5M c-1M d-2M
March 5, 2008

English (College Prep)
I have to write an English essay about "The Crucible." Has anyone read the book, and understood it? I just need someone to help me brainstorm ideas to write about. Thanks!
November 27, 2007

math
What are some facts for rate and principle?
October 16, 2007

math
A cube with edges of length 2 centimeters is buildt from centimeter cubes. If you paint the faces of this cube and then break it into centimeter cubes, how many cubes wil be painted on three faces? how many will be painted on two faces? On one face? How many will be unpainted...
January 31, 2007

Physics
A golfer, standing on a fairway, hits a shot to a green that is elevated 4.72 m above where she is standing. If the ball leaves her club with a velocity of 49.0 m/s at an angle of 42.5 ° above the ground, find the time that the ball is in the air before it hits the green.
January 29, 2007

Physics
The acceleration due to gravity on a planet other than the earth has a magnitude of 1.50 m/s2. As in examples 6, 7 and 8, a placekicker kicks a football with an initial speed of 20.3 m/s at an angle of 39.4 ° above horizontal. Assume that the ball is kicked on this other ...
January 29, 2007

Physics
A hot-air balloon is rising upward with a constant speed of 2.21 m/s. When the balloon is 2.25 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?
January 25, 2007

physics
1.The mass of a string is , and it is stretched so that the tension in it is 180 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string? 2.A rocket engine emits of sound energy every second. The ...
December 7, 2006

Physics
1.The mass of a string is , and it is stretched so that the tension in it is 180 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string? 2.A rocket engine emits of sound energy every second. The ...
December 6, 2006

Physics
1.The mass of a string is , and it is stretched so that the tension in it is 180 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string? 2.A rocket engine emits of sound energy every second. The ...
December 6, 2006

Physics
This time I have two questions: #1.A recording engineer works in a soundproofed room that is 49.7 dB quieter than the outside. If the sound intensity in the room is 2.66 x 10-10 W/m2, what is the intensity outside? #2.A listener increases his distance from a sound source by a ...
December 5, 2006

Physics
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 2.89 x 10-6 W/m2 at a distance of 127 m from the explosion. Find the distance (in m) from the source at which the intensity is 1.56 x 10-6...
December 5, 2006

Physics
Tsunamis are fast-moving waves often generated by underwater earthquakes. In the deep ocean their amplitude is barely noticable, but upon reaching shore, they can rise up to the astonishing height of a six-story building. One tsunami, generated off the Aleutian islands in ...
December 5, 2006

Physics
the pressure is one atmosphere and determine the heat in joules required to produce 5.03 kg of water vapor at 100.0 °C, starting with (a) 5.03 kg of water at 100.0 °C and (b) 5.03 kg of liquid water at 0.0 °C. for part (a) I used the equation Q=mL and L was a given...
November 17, 2006

Physics
During an all-night cram session, a student heats up a 0.451 liter (0.451 x 10- 3 m3) glass (Pyrex) beaker of cold coffee. Initially, the temperature is 19.5 °C, and the beaker is filled to the brim. A short time later when the student returns, the temperature has risen to...
November 17, 2006

Physics
In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 49 N to the input piston, which has a radius r1. As a result, the output plunger, which has a radius r2, applies a force to the car. The ratio r2/r1 has a value of 6.9. ...
November 13, 2006

sociology
Hey Sarah, I find it a tad ironic that you are telling everyone else to use their brains when you post this: "Whatta concept!" - Yeah, that's proper grammar! Next time try posting something gramatically correct and you might make sense.
July 20, 2006

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