Marty
Most popular questions and responses by Marty
Chemistry
I'm trying to find if potassium nitrate is polar or nonpolar by using the electronegativity scale. Can someone check my work? Electronegativity: potassium: 0.82 nitrogen: 3.04 oxygen: 3.44 =3.443.04 =0.820.4 =0.4 =0.42 So the final answer is 0.42 and by
asked on November 10, 2007 
Physics
an electron in a mercury atom jumps from level a to level g by absorbing a single photon. determine the energy of the photon in joules.
asked on April 19, 2012 
Chemistry
At what temperatures can 40mL of water dissolve the follownig quantities of potassium nitrate? (a) 35.0g (b) 20.0g can anyone start me off with a formula or a hint?
asked on November 14, 2007 
Chemistry
How many atoms of H are in a mixture of 3.49 x 10^23 molecules of H2O and 78.1g of CH3OH?
asked on October 22, 2007 
Chemistry
What would be the mass of a bag of anhydrous magnesium sulfate, MgSO4, if it contained the same amount of magnesium as a 1.00kg bag of Epsom Salts, MgSO4 . 7H2O?
asked on October 22, 2007 
Chemistry
A hydrate of zinc nitrate has the formula Zn(NO3)2 . xH2O. If the mass of 1 mol of anhydrous zinc nitrate is 63.67% of the mass of 1 mol of the hydrate, what is the value of x?
asked on October 22, 2007 
Physics
Calculate the work done by planet X on its moon. Planet X applies a force of 5.6 x 10^10 N on its moon and the moon is 4.0 x 10^8 km away from the planet and it continues to circle the planet in a circular orbit of circumference of 2.5 x 10^9 m.
asked on March 26, 2008 
Chemistry repost URGENT
Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I
asked on October 22, 2007 
Chemistry
A hydrated MgSO4 salt, weighing 3.211g, is heated in a crucible until reaching a constant weight. The weight of the anhydrous MgSO4 is 1.570 grams. 1. Calculate the moles of H20 removed and the moles of anhydrous MgSO4 remaining in the crucible. 2. What is
asked on October 20, 2007 
Chemistry
How many atoms of C are contained in 45.6g of C6H6?
asked on October 20, 2007 
Physics
If you weighed 112 N on the Moon where g=1.6N/kg, how much would you weigh on Earth?
asked on March 5, 2008 
Maths
In order to make some home improvements, a home owner spent $40,000. He paid 20% as a down payment and financed the balance of the purchase with a 36month fixed installment loan with an APR of 7.5%. Determine the home owner’s a) total finance charge and
asked on March 6, 2008 
Chemistry
1. Water is a polar molecule. Therefore, it acts as a polar sollvent. a) Think about the following compounds: iodine, cobalt (II) chloride and sucrose (C12H22O11). Which compounds are soluble in water. b) Assume that the interaction between solutes and
asked on November 6, 2007 
Chemistry
6ClO2 + 3H2O > 5HClO3 + HCl a) If 71g of ClO2 is mixed with 19g of water, what is the limiting reactant? b) What mass of HClO3 is expected in part (a)? c) How many molecules of HCl are expected in part (a)? I completed part a and b but got stuck on part
asked on October 29, 2007 
Chemistry
The isotopes of argon have the following relative abundances: Ar36 0.34% Ar38 0.06% Ar40 99.66% Estimate the average atomic mass of argon. How would I go about doing this?
asked on October 20, 2007 
math
Sue wants to frame a picture with a matte of uniform width all around the print. Sue wants the area of the matte to equal the area of the picture. If the print measures 60cm by 40cm how wide should the matte be? let the width of the uniform matte be x cm
asked on May 23, 2007 
accounting
John's specialty store uses a perpetual inveentory system. the following are some inventory transaction for the month of may 2009. John's purchased merchandise on account for $5,000. FREIGHT CHARGE OF $300 WERE PAID IN CASH. JOHN'S RETURNED SOME OF THE
asked on November 28, 2010 
Calculus
An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200m running track. Find the dimension that will make the area of the rectangular as large as possible.
asked on March 7, 2009 
Physics
The first and second resonant lengths of an air column that is closed at one end are 15.5 cm and 45.5 cm, respectively. What is the best value for the wavelength?
asked on April 26, 2008 
Physics
At a height of 3.00 m above the ground, a 0.500kg ball is thrown with an initial speed of 30.0 m/s in an arc from point A to point C. When the ball is 6.00 m above the ground travelling upward, what is the speed of the ball?
asked on March 26, 2008 
Physics
A 2500kg car is travelling due west at 30m/s when the brakes are applied, exerting a force of 5000 N [E]. What is the car's acceleration due to the braking?
asked on March 2, 2008 
Chemistry
Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I
asked on October 22, 2007 
physics
How much would a 60kg person weight on the Moon where the gravitational field has a magnitude of 1.6 N/kg?
asked on March 5, 2008 
Physics
A block M1 of mass 20.0 kg sits on top of a larger block M2 of mass 30.0 kg which sits on a flat surface. The kinetic friction coefficient between the upper and lower block is 0.415. The kinetic friction coefficient between the lower block and the flat
asked on October 2, 2015 
physics
A rocket ship at rest in space gives a short blast of its engine, firing 26 kg of exhaust gas out the back end with an average velocity of 182 m/s. What is the change in momentum of the rocket during this blast?
asked on April 2, 2013 
Chemistry
Express each quantity as a mass in grams. a) 3.70mol of H2O b) 8.43 x 10^23 molecules of PbO2
asked on October 20, 2007 
Physics
An airplane has a takeoff speed of 66m/s. Assuming a constant acceleration of 1.62m/s^2, how long is the plane accelerating down the runway?
asked on August 28, 2015 
Chemistry
Convert each quantity to an amount in moles: a) 4.27 x 10^21 atoms of He b) 7.39 x 10^23 molecules of ICl
asked on October 20, 2007 
Math
How do you factor 6a^2 + 17ab + 12b^2
asked on September 4, 2007 
Math word problem
The cost of producing x bags of pretzels is modelled by C(x)=0.5x^2 + x + 2 where x=# of bags per hundred. State the function that represents the average cost.
asked on November 9, 2008 
Physics need help now
A daredevil is dead set on jumping the Grand Canyon at its narrowest point (180 meters across). He has set up a ramp at 25 degrees and the ramp's release point is 20 meters above the rim of the canyon. He claims that his bike will be going 40m/s by the
asked on September 22, 2013 
Math (Functions)
he cost of producing x bags of pretzels is modelled by C(x)=0.5x^2 + x + 2 where x=# of bags per hundred. State the function that represents the average cost. Do you just have to factor it?
asked on November 9, 2008 
Math
PLEASE HELP FACTOR: 1. 8x^4  14x^2y^2 + 3y^4 2. 10m^2  17mn  6n^2
asked on September 4, 2007 
math
Jeff is replacing the tile on his floor. he pans to use square tiles that are 11 inches on a side. the floor is 8 feet long and 6 feet wide. cabinet in the middle of the floor that will not need tile. this space is 2 feet wide and 3 feet long. estimate how
asked on April 14, 2015 
statistics
The mean score for all individuals who took the Law School Admission Test (LSAT) in 2010 was 155 and the standard deviation was 7. 9. What is the z score for a person, who received an LSAT score of 167? a. +1.71 b. +1.64 c. +1.74 d. 1.71 10.What is the
asked on April 18, 2014 
physics
A daredevil is dead set on jumping the Grand Canyon at its narrowest point (180 meters across). He has set up a ramp at 25 degrees and the ramp's release point is 20 meters above the rim of the canyon. He claims that his bike will be going 40m/s by the
asked on September 22, 2013 
Nuclear Physics
If a polonium210 (Po210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po210 nucleus? Hint: W = F*r F=kq1q2/r 2
asked on January 13, 2011 
health help please!!
socialization process of caregivers. what are the implications for patients?
asked on August 4, 2008 
math
2/6 of the insects were centipedes. 1/2 were millipedes, 12 were flies. How many insects were there? Please explain.
asked on March 11, 2008 
calculus
If you are blowing up a balloon at a rate of 3 cubic ft per min, what is the rate of change of the radius after 30 seconds
asked on December 16, 2016 
Math
Mandy got 22 questions correct on her test. Her grade was 80%. How many questions were on the test.
asked on October 20, 2014 
LOGS (ALGEBRA)
FIND THE INVERSE: f(x) = 10^(5x+3)  10 f^1(x) =
asked on May 5, 2014 
Acct
One of the companies for which you provide accounting services offers office cleaning services and has 8 customers. Cleaning services are provided in the evenings, Sunday through Thursday, at a rate of $30 per day. Billing is done every Friday. During the
asked on February 20, 2014 
chemistry
100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.998 g/mL) to determine the mass
asked on June 27, 2011 
Tech math
The sum of two numbers is 32. Ten more than half of the sum of the numbers is 26. What are the numbers?
asked on May 26, 2011 
physics
If a polonium210 (Po210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po210 nucleus? Hint: W = F*r F=kq1q2/r 2
asked on January 14, 2011 
Cultural Diversity
if some one made the following statement Asian americans and pacific islander belong to a single asian American culture, how would you explain that the statement is a misconception? include whether you think ,most americans believe this misconceptions and
asked on April 12, 2010 
Physics
If the third harmonic of a standing wave in a vibrating string is 600 Hz, what is the fundamental frequency?
asked on April 26, 2008 
Physics
The applied force of a 2.0kg object is 8.4 N [E] and the friction is 2.2 N [W]. What is the motion of the object? Can I use the formula Fnet = ma?
asked on March 2, 2008 
economics
What changes if any to the current condition of these tools would you make at the next meeting of the Federal Reserve Explain why and the benefitsdrawbacks of this strategy
asked on December 4, 2007 
Math
Betty is supposed to work the same number of hours each week. One week, she worked 42 hours the first week and 34 hours the second week, how many hours is Betty supposed to work?
asked on December 13, 2015 
Physics
A model rocket is launched straight upward with an initial speed of 46.4 m/s. It accelerates with a constant upward acceleration of 2.18 m/s2 until its engines stop at an altitude of 138 m. What is the maximum height reached by the rocket? How long after
asked on September 4, 2015 
statistics
A residential treatment facility tests a new group therapy for patients with self destructive behaviors. To decrease scores of behaviors that has a mean in the overall population of 35 and a standard deviation of 4.7. The mean score for patients after new
asked on March 1, 2013 
medical coding and billing
discuss coding or obstetrics, including items covered by the global fee for antepartum and pospartum periods of normal pregnancy
asked on September 22, 2010 
algorithms and logic
i need an example of a peer review of the currency conversion test procedure exercises
asked on June 10, 2010 
algebra
7r3s=18 3r+7s=16 Solve by the elimination method, please.
asked on April 11, 2010 
algebra
Perform and give answer in simplified form Find the product (2x5)^2
asked on December 13, 2009 
Algebra
Factor completely 6a9a^2
asked on December 13, 2009 
math
why is it necessary to find the gcf of two or more numbers
asked on April 11, 2009 
Calculus
Find the volume of the cone of maximum value that can be inscribed in a sphere of radius 10cm.
asked on March 9, 2009 
Physics
A student photographs a 18cm flower so it fills half of a 24mm slide. What is the magnification?
asked on May 20, 2008 
Significant Digits
(2.7 x 10^2) x (4.23 x 10^2) PLEASE YOU SIGNIFICANT DIGITS!!! thx
asked on September 28, 2007 
Math
A walking area around a pool is going to be frfinished with a nonslip surface. If it costs $17 per square foot to install what is the total cost? Inner rectangle is length 20 ft by width 10 ft. Outer dimensions of walkway are 14 length by 10ft. I have no
asked on October 7, 2016 
math
(1,0) (3,4) (5,8) (7,12) what would be the output value when the input value is 12?
asked on September 22, 2014 
math
factor 8x^38x=0
asked on January 26, 2014 
WAN
Provide a hypothetical situation for each signal type that illustrates how it could be, or is being, used in a WAN. In what circumstance, for example, would a company choose to use a satellite signal
asked on January 31, 2013 
us history
How did the automobile change America both geographically and socially?
asked on August 24, 2012 
SCIENCE
A PIPE FULL DIESEL HAS 5 PSI ON IT, AT 70 DEGREES AND ONE DEGREE OF CHANGE = WHAT PRESSURE
asked on August 24, 2012 
american history
I need to present arguments for and against imperialism in the 19th century and state if it was UNAmerican or not.
asked on August 13, 2012 
american history
What did the Compromise of 1877 have to do with the end of Reconstruction?
asked on August 3, 2012 
Health
Write a 200 to 300word response to the following: What is longterm care? Provide an example. What is continuum of care services in the United States? Why is longterm care one of the greatest challenges facing the health care delivery system today?
asked on July 19, 2012 
chemistry
100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.998 g/mL) to determine the mass
asked on June 27, 2011 
mat116
G(z)=4z+2 how to work this
asked on July 25, 2010 
computers
hl=en&lr=&as_qdr=all&ei=pAQqTJXuBsP38AaSnPTRCA&q=how+does+an+information+system+work+what+are+its+people+organizational+and+technological+components+List+and+describe+the+people+organizational+and+technological+components&start=10
asked on June 29, 2010 
Cultural Diversity
if someone made the following statement asian americans and Pacific Islanders are a model minority, how would you explain that the statements are misconceptions and why or why not. include whether you think most americans believe these mixconceptions, and
asked on April 12, 2010 
cultural diversity
23 consequence situations that are associated with group known as native americans.
asked on February 26, 2010 
algebra
solve the equation for x 1 + 1 = 1    x 12 8
asked on December 13, 2009 
havelock high
An object accelerates (changes its speed) only if the forces acting on it in one direction are greater than the forces in the opposite direction, All of the following objects will accelerate EXCEPT? A) a ball striking a wall, in which the force of the ball
asked on March 29, 2009 
5th grade math
A radius and a diameter both have to ___________.
asked on March 17, 2009 
8th grade
Need weight of Iron vs magnesiium
asked on January 12, 2009 
Psychology
Describe other measurements sociologists use to calculate prejudice.
asked on August 27, 2008 
Physics
Two identical charges are 36 mm apart. The electrostatic force between them is 1.3 N. What is the size of each charge?
asked on June 3, 2008 
Chemistry
What are some factors that affect the solubility of ionic substances?
asked on November 24, 2007 
math
is 3n^2  11n + 6 factorable?!
asked on September 4, 2007 
Math
x^4 + x^2  20 Help! I have no clue how to factor this! Do i have to square root everything?
asked on September 4, 2007

History
i go to privavera too
posted on July 17, 2019 
Social Studies
answers b,d 100% connexus
posted on February 8, 2017 
calculus
aren't you supposed to plug everything in AFTER you derive it?
posted on December 16, 2016 
math
x=7.5 y=18.5
posted on November 21, 2016 
12th grade A.P. Economics
Functioning labor unions
posted on June 9, 2016 
math
2 ounces
posted on January 27, 2016 
equations
3 dimes+1 nickle+2pennies=1quarter+1dime+?
posted on November 13, 2012 
american history
I believe if I had an example of the arguments for and against I would be able to go from there.
posted on August 13, 2012 
physics
I don't quite understand
posted on January 14, 2011 
Calculus questions..really need help, please!
woops i mean this........ the answer to this question is..... OMG KID THAT IS HARD, WHAT GRADE R U IN
posted on November 4, 2008 
Calculus questions..really need help, please!
the answer to this question is OMG THAT ISHARD JESE KID WAT GARDE R U IN
posted on November 4, 2008 
math mesurment
i do not ahve a clue but then again im only in 7th grade
posted on November 4, 2008 
math mesurment
i woudn't know the answer to this ? but i would think there is
posted on November 4, 2008 
math mesurment
is there a ruler thhat is just made for fractions like 1/8ths and lower
posted on November 4, 2008 
Com 220
Actually it is called the SQ3R method, my bad.
posted on August 27, 2008