Sunday
March 1, 2015

Posts by dEE


Total # Posts: 779

chemistry
delta t = i*Kf*m m = mols/kg solvent 4= (3)(1.86) m= 0.717 (0.717)(1000) = 0.000717mol 0.000717mol/110.98g/mol = 6.46 x 10^-6g
March 2, 2013

chemistry
is the answer 0.079g or 0.00000646g ? I'm not sure if I've done it correctly.
March 2, 2013

chemistry
If Kf = 1.86C/m, how many grams of calcium chloride must be added to 1.0L of water (assume a density of 1.0 g/mL) to lower the freezing point 4.0 C?
March 2, 2013

Chemistry
Imagine two solutions with the same concentration and the same boiling point.? Imagine two solutions with the same concentration and the same boiling point, but one has ethanol as the solvent and the other has carbon tetrachloride as the solvent. Determine that concentration ...
March 2, 2013

Chemistry
A solution is made by mixing 37.0 mL of ethanol, C2H6O, and 63.0 mL of water.? Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C? ethanol: 0.789 g/mL 43.9 torr water : 0.998 g/mL 17.5 torr
March 2, 2013

Math
Find the number of each kind of object in the collection Miranda has 24 CDs in her collection. Of those CDs, 10 are pop CDs. She has 6 more country CDs than jazz CDs. How many country CDs does Miranda have?
March 1, 2013

physics
Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely travel along the unbanked curve at a maximum speed v0 under conditions when the coefficient of static friction between the tires and the road is...
February 28, 2013

physics
A kite is hovering over the ground at the end of a straight 47-m line. The tension in the line has a magnitude of 14 N. Wind blowing on the kite exerts a force of 17 N, directed 55° above the horizontal. Note that the line attached to the kite is not oriented at an angle ...
February 28, 2013

Chemistry
The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution? Show work. A) 0.69 B) 0.32 C) 0.13 D) 0.045 E) 0.87
February 27, 2013

Chemistry
Isoamyl salicylate (м = 208.25 g/mol) has a pleasant aroma and is used in perfumes and soaps. Which of the following combinations gives a 0.75 m solution of isoamyl salicylate in ethyl alcohol (d = 0.7893 g/mL)
February 27, 2013

math
500000
February 25, 2013

Chemistry
Explain how you would prepare 100.0 mL of 0.500 M NaCl solution. Include the appropriate glassware and calculations.
February 25, 2013

math
A two digit number has the property that the units digit is 4 less than the tens digit and the tens digit is twice the units digit. What is the number?
February 18, 2013

Physics
A model rocket launches with an initial velocity of 6 m/s, at an angle of 90 degrees (with respect to the horizon). The rocket's engine provides an acceleration of 2.2 m/s2, acting in the same direction as the initial velocity. After 20 seconds, the rocket engine cuts out...
February 15, 2013

physics
A spacecraft is on a journey to the moon. At what point, as measured from the center of the earth, does the gravitational force exerted on the spacecraft by the earth balance that exerted by the moon? This point lies on a line between the centers of the earth and the moon. The...
February 12, 2013

physics
The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon. The masses are: mass of sun = 1.99 1030 kg, mass of earth = 5.98 1024 kg, ...
February 7, 2013

physics
The weight of an object is the same on two different planets. The mass of planet A is only forty-five percent that of planet B. Find the ratio rA/rB of the radii of the planets.
February 7, 2013

physics
A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 45.5° above the horizontal and has a magnitude of 7.60 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
February 7, 2013

math
How to name 3300 in 4ways
February 7, 2013

Movement and Music
which of the following best describes the realation between movement and music a movement and music are parteners because they enhance each other and provide enjoyment
February 7, 2013

English II
I have to write an satire and I am doing it on the movie The Help.
February 3, 2013

physics
A hot-air balloon is rising straight up with a speed of 6 m/s. A ballast bag is released from rest relative to the balloon at 7 m above the ground. How much time elapses before the ballast bag hits the ground?
January 31, 2013

physics
Search: On a pleasure cruise a boat is traveling relative to the water at a speed of 5.4 m/s due south. Relative to the boat, a passenger walks toward the back of the boat at a speed of 1.4 m/s. (a) What is the magnitude and direction of the passenger's velocity relative ...
January 31, 2013

physics
In a marathon race, Chad is out in front, running due north at a speed of 3.92 m/s. John is 92 m behind him, running due north at a speed of 4.33 m/s. How long does it take for John to pass Chad?
January 31, 2013

physics
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 16.1 m/s at an angle of 41.1° above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
January 31, 2013

physics
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 16.1 m/s at an angle of 41.1° above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
January 31, 2013

Physics
A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v0x = +0.8 m/s and ax = +0.9 m/s2. The y components of the puck's initial velocity and acceleration are ...
January 31, 2013

Physics
As a tennis ball is struck, it departs from the racket horizontally with a speed of 28.2 m/s. The ball hits the court at a horizontal distance of 19.5 m from the racket. How far above the court is the tennis ball when it leaves the racket?
January 30, 2013

Physics
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which time it experiences an acceleration of 390 m/s2. The ball is launched at an angle of 46° above the ground. Determine the horizontal and ...
January 30, 2013

Physics
A meteoroid is speeding through the atmosphere, traveling east at 19.0 km/s while descending at a rate of 12.9 km/s. What is its speed, in km/s?
January 30, 2013

MATH
AMANDA TEST SCORE ON SIX TESTS WAS 94. FIVE OF THE SIX TEST SCORES WERE 88, 94, 93, 95 & 99. WHAT WAS THE SIXTH TEST SCORE?
January 29, 2013

Math 104
A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results were as follows: 34 said they drove alone. 24 rode in a carpool. 28 rode public transportation. 3 used both carpools and public transportation. 3 used both a carpool and ...
January 19, 2013

statistics
The company policy for customer service representatives gives time off for positive reviews. If, in the first 20 calls a customer service agent handles in a day, 13 or more elect to take a subsequent survey and rate the service as “excellent”, then the company gives ...
January 10, 2013

algebra 2
The label on a prescription bottle directs the patient to take the medicine twice a day. The effective ingredient of the medicine decreases continuously at a rate of 25% per hour. If a dose of medicine containing 1 milligram of the effective ingredient is taken, how much is ...
December 20, 2012

physics
A student is skateboarding down a ramp that is 6.88 m long and inclined at 16.9 degrees with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp 2.54 m/s. Neglect friction and find the speed at the bottom of the ramp in m/s.
December 19, 2012

chemistry
What is the type of glycosidic bond in case alpha?
December 16, 2012

chemistry
When disaccharide beta is hydrolyzed, which monosaccharide units are produced?
December 16, 2012

chemistry
When disaccharide alpha is hydrolyzed, which monosaccharide units are produced? A) D-glucose and D-fructose monosaccharide units B) two D-fructose monosaccharide units C) two D-glucose monosaccharide units
December 16, 2012

Chemistry
When disaccharide alpha is hydrolyzed, which monosaccharide units are produced? A) D-glucose and D-fructose monosaccharide units B) two D-fructose monosaccharide units C) two D-glucose monosaccharide units
December 16, 2012

Chemistry
What mass of solid sodium acetate, NaCH3COO, must be added to 2.50 L of an aqueous solution of 0.55 M acetic acid, CH3COOH, in order to make a buffer solution whose pH is 4.50? Assume that adding the solid does not change the volume of the solution.
December 15, 2012

Statistics
62.Refer to the Baseball 2009 data, which report information on the 30 Major League Baseball teams for the 2009 season. a. At the .05 significance level, can we conclude that there is a difference in the mean salary of teams in the American League versus teams in the National ...
December 1, 2012

algebra
f(x)=-2+5 sketch a graph
November 30, 2012

science
The force that every mass exerts on every other mass is called _________. A. gravity B. pull C. matter D. weight
November 27, 2012

coversion
150lbs= how many kg when 1kg=2.2 lbs
November 21, 2012

Chemistry
1.90X10^19 it would remain the same
November 17, 2012

chemistry
If 8.00g of methane is burned with 6.00g of oxygen. How much methane,oxygen,carbon dioxide,and water remain after the reaction is complete in grams?
November 12, 2012

physis
A box slides downwards at a constant velocity on an inclined surface that has a coefficient of friction uK = .58 The angle of the incline, in degrees, is most nearly:
November 9, 2012

Chemistry
A 1.30-L sample of argon gas is at 1.02 atm and 21.5 degrees Celsius. a. what mass of argon is in the container. b. If the temperature is raised to 500 degrees celsius while the volume remains constant, calculate the new pressure, in stmospheres.
November 9, 2012

chemistry
a 55g aluminum block initially at 27degrees C absorbs 725J of heat. What is the final temp. I know I need to use the equation q=m*Cs*Delta T but I cannot figure out how to rearrange the equation to isolate Tf to get the answer. Thanks for any help.
November 4, 2012

math
I NEED HELP TO!!!!! SOMEONE PLEASE HELP!!!
November 2, 2012

intermediate algebra
a basketball player scores 35 times during a gam,e. he scored 57 total point 2 for each 2 point shot and one for each free throw how many two pint shots did he make and how many free throws did he make
October 29, 2012

Algrebra
substitution method 3x + y=12 8x-2y =4
October 29, 2012

Math
Find two numbers whose ratio is 4 to 3 and are such that the sum of their squares is 100.
October 29, 2012

math
an artist is going to an art fair. the artist will charge $20 for small prints $45 for large prints. the artist would like to sell twice as many small prints as large prints. the booth the artist is renting costs $510. how many of each size print must the artist sell in order ...
October 28, 2012

4th grade math
You can divide 108 into 324 to find the product of 324 x 4 324/108 = 3 or You can Multiply 3 x 108 = 324 to find the product of 324 x 4
October 19, 2012

LATIN
The new book will belong to the consul
October 11, 2012

LATIN
How do I say "belong to" in Latin?
October 11, 2012

LATIN
Thanks!
October 11, 2012

LATIN
Filio meo multi amici erunt I have trouble understanding what this means exactly. This is all I have as a literal translation My brother many friends there are/ they are
October 11, 2012

Physics
A 2000 kg car is slowed down uniformly from 18.0 m/s to 5.00 m/s in 4.20 s. (a) What average total force acted on the car during that time? (b) How far did the car travel during that time?
October 5, 2012

latin
English to latin translation needed. Friends, hurry to our house now.
October 3, 2012

CHEM
Thanks a lot :)
October 3, 2012

CHEM
9.60 g of hydrated nickel (II) sulfate is heated to produce 5.26 g of anhydrous compound NiSO4. Calculate the number of moles of anhydrous nickel (II) sulfate. Calculate the number of moles of water lost. What is the empirical formula of the hydrate?
October 3, 2012

CHEM
A sample of an unknown hydrate weighs 0.500 g and after heating it weighs 0.100. What is the percent of water in the hydrate?
October 2, 2012

CHEM
A 7.5 g sample of Cu(NO3)2.nH2O is heated. After the water has been driven off, 5.8 g of Cu(NO3)2 remains. What is the value of n in the empirical formula of this hydrate?
October 2, 2012

math
48 inches to 3 feet
October 2, 2012

Chemistry
Lab: Titration of NaOH (0.1 molar)to unknown solid acid. Trying to determine the equilivent weight of the unknown acid in the experiement. I am trying to figure out if I add too much base solution by accident to an unknown acid during titration would it affect the equivalent ...
September 26, 2012

Business and Society
In one paragraph, supported by evidence in your text and from other research, describe two forces that you believe shape the relationship between business and society. Provide two examples (one for each force you choose). Look for flaws and strengths in specific examples and ...
September 25, 2012

skills for sucess
Jenny has a part time job and her net take-home income is $2000 per month. She needs to allocate her funds to reflect a balanced monthly budget. Jenny's main categories of expenses include rent, utilities, and groceries.
September 24, 2012

language
what does word parts mean
September 10, 2012

liberal arts
Select the symbol below that fills in the blank to correctly complete the mathematical statement: 8.79 ____ 8.9
August 31, 2012

Calculus
i dont know
August 31, 2012

math
A race car can travel 3 laps in 10 minuets. How long would it take the race car to complete a 120 mile long race?
August 31, 2012

hwwt
why do paras have to document everything a child does?
August 9, 2012

writing
when you write a sentence, how do you know what a verb, adj.or conjuction is?
August 9, 2012

Writing
I missed my friends and lunch period.
August 7, 2012

Early Childhood
I think it could also be c
July 31, 2012

math
How do you solve this by elimination method? 4x+3y=016x+3=8y
July 31, 2012

math
where did you get the 0.34 from?
July 24, 2012

English
why wouldn't employees be paid or compensated for extensive overtime? Is the branch following eimployee contractual agreements and agency/branch policies? Is the Roanoke branch operating under different salary scales/schedules than others Phoenix offices?
July 16, 2012

sciencedd
dndndndd
July 9, 2012

math
An investor bought 150 shares of an airline.She paid $60 per share for 50 shares $50 per share for 60 shares $75 per share for 40 shares what was her average price per share
June 18, 2012

physics
Weight=mass x acceleration due to gravity W=mg W=(3.0kg)(9.81m/s^2) W=29.43 N
June 17, 2012

Phsyical science
What physical quantities are governed by the quantum numbers of an atomic electron?.
June 13, 2012

algebra 1b
Solve the problem by stating the equation you would use to solve and then solving it. After receiving discount of 12.5% on its bulk order of printer paper, johns office supply pays $3200 . what was the price of the order before the discount ? round to the nearest dollar. in
June 11, 2012

early childhood literacy
it would be model the correct language
June 5, 2012

math
help find the simple interest rate. Find the simple interst owed for the use of the money. Assume 360 days in a year. p=$4000, r=6%, t= 1year
May 9, 2012

math
help find the simple interest rate. Find the simple interst owed for the use of the money. Assume 360 days in a year. p=$4000, r=6%, t= 1year
May 8, 2012

Math
Help Homework : MaKE A TABLE:relate primeter and area Amaya has 24 inches of ribbon she can glue around the edge of a rectangular gift box lid. if she wants to use all the ribbon without any overlapping, what are the length and width of a gift box lid with the greatest area?
May 3, 2012

Ant 101
Modernization theory suggests
April 30, 2012

Economics
Provide an alternative explanation to the one given in the text for why isoquants cannot cross.
April 25, 2012

Economics
Marginal Cost (MC): $5 per unit Fixed Cost (FC): $20 Total Cost (TC): $25 Average Variable Cost (AVC): $5 FC is always going to be constant at $20; however, VC is the change in cost as an increase in cost of product to produce more.
April 25, 2012

Economics
2. Advertising can inform buyers, but sellers must incur costs to advertise. If so, advertising can result in higher prices to consumers. Does this mean advertising is economically inefficient? If not, explain how it can simultaneously create value and increase market prices.
April 25, 2012

acc 100
95,000
April 24, 2012

math
Ever wonder how much a house “actually” costs? Consider Alex and Sabrina who purchased a house with a selling price of $249,000.00. They managed to put 15% down and were approved for a 30-year conventional loan at 7% to cover the remaining $211,650.00. Their new ...
April 24, 2012

Math
Suppose Kevin and Jill both deposit $4000 into their personal accounts. If Kevin’s account earns 5% simple interest annually and Jill’s earns 5% interest compounded annually, how much will each account balance show at the end of 5 years? Calculate the difference ...
April 24, 2012

math
If 611 men at a conference comprise 65% of all people at the conference, how many people are at the conference?
April 14, 2012

algebra 2
b/3 + 6=82
April 11, 2012

physics
Di=DoF/Do-F Substitute values... Do=390 mm
March 28, 2012

Math
Maya bought a car for $15,000. To pay for it, she took a bank add-on interest loan at an annual interest rate of 9%. The loan term is 5 years. How much interest will she pay and what are her monthly payments?
March 25, 2012

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