Friday

October 9, 2015
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*

**Math**

35-24
*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*

**intermediate algebra-check my answer**

Ok thanks
*February 15, 2011*

**intermediate algebra-check my answer**

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

**intermediate algebra-check my answer**

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*

**Helper helped**

thanks
*February 4, 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**

Compute log7^6 . Round your answer to 3 decimal places.
*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**

Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation
*February 2, 2011*

**Algebra**

Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation
*February 1, 2011*

**Algebra**

Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation
*February 1, 2011*

**Algebra-problem restated**

Solve the following inequality. (x-4)/(-x+2)>0 Write your answer using interval notation
*February 1, 2011*

**Algebra**

Solve the following inequality. (x-4/-x+2)>0 Write your answer using interval notation.
*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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