Friday
May 29, 2015

Posts by Anne


Total # Posts: 671

Chemistry
The SI unit of length is a meter, which is defined as the length equal to 1,650,763.73 wavelengths of light emitted by a particular energy transition in krypton atoms. Calculate the frequency of the light to three significant figures.
October 31, 2012

Chemistry
Describe how to make 500.0 mL of 3.6 M acetone
October 26, 2012

Chemistry
In an experiment to measure the solubility of Ba(OH)2 x 8H2O in water, an excess of solid Ba(OH)2 x 8H2O was stirred with water overnight. the saturated solution was allowed to stand until all the undissolved solid had settled. a 10.00mL sample of the clear supernatant liquid ...
October 25, 2012

Chemistry
The solubility of CaSO4 is 0.209 g/100 mL of water at 30 degrees celsius. if 0.500 g CaSO4 is stirred overnight at 30 Degrees Celsius with 100.0 mL of water, a. How many grams of CaSO4 remain undissolved? b. Calculate the molarity of CaSO44 in solution
October 25, 2012

Chemistry
a 2.00 g sample of zinc was dissolved in 50.0 mL of 6.0 M HCL the final volume of solution was 50.2 mL... a. what was the concentration of Cl- after the zinc was dissolved?? b. what was the concentration of hydrogen ion after the zinc was dissolved??
October 25, 2012

Chemistry
assuming that each molecule contains one acidic hydrogen---that is, the formula is HCnHmOp? assumin gthat each molecule contains 2 acidic hydrogens---that is, the formula is H2CnHmOp??
October 25, 2012

Chemistry
By titration 24.68mL of 0.1017 M NaOH is required to neutralize 0.1482 g of an unknown organic acid. what is the formula mass of the acid?
October 25, 2012

Government
Im not asking for the answer im asking you to help me to understand what the question is asking for. If I could understand it from my book i would
October 24, 2012

Government
please help me with an explanation
October 24, 2012

Government
1. c 2.a 3.a
October 24, 2012

Government
Pluralists believe that the dominant player in American politics is (1 point) the president. groups. the government. rich individuals. the media. All of the following are generally more true of Americans than Europeans EXCEPT (1 point) they volunteer more time to their ...
October 24, 2012

Physics
A cannonball is fired with a velocity of 200 m/s at an angle of 25 degrees above the ground. After the total flight of 45.6 seconds, the cannonball returns to the ground. Calculate: the initial horizontal and vertical components of the velocity, the maximum height of the ...
October 23, 2012

Physics
A car of mass 1396 kg is parked on a very slippery hillside.To keep it from sliding down the hill (è = 15°), the owner attaches a cable. What is the tension in the cable?Determine the components of all the forces on the car along the coordinate axes.
October 20, 2012

Physics
Block 1 sits on a table with rope that is attached to block 2 hanging over the edge where m1 = 43 kg and m2 = 11 kg. Assume that there is no friction between m1 and the table. Find the acceleration of the crates and the tension in the string
October 20, 2012

Physics
Block 1 is up an incline and is attacthed to block 2 by a rope, with m2 = 5.0 kg and è = 33°.If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at rest?
October 20, 2012

Physics
Consider a swimmer who wants to swim directly across a river. If the speed of the current is 0.31 m/s and the swimmer's speed relative to the water is 0.57 m/s, how long will it take her to cross a river that is 13 m wide?
October 20, 2012

Physics
A soccer ball is kicked with an initial speed of 23 m/s at an angle of 20° with respect to the horizontal.(a) Find the maximum height reached by the ball. (b) Find the speed of the ball when it is at the highest point on its trajectory. (c) Where does the ball land? That ...
October 20, 2012

Physics
A baseball is hit with an initial speed of 42 m/s at an angle of 30° relative to the x (horizontal) axis.(a) Find the speed of the ball at t = 3.4 s. (b) What angle does make with the x axis at this moment? (c) While the ball is in the air, at what value of t is the speed ...
October 20, 2012

Physics
A bullet is fired from a rifle with a speed v0 at an angle è with respect to the horizontal axis from a cliff that is a height h above the ground below. Calculate the speed of the bullet when it strikes the ground.
October 20, 2012

Physics
A block slides down an inclined plane that makes an angle of 23° with the horizontal. There is friction between the block and the plane. If the acceleration of the block is 2.1 m/s2, find the coefficient of kinetic friction between the block and the plane.
October 20, 2012

US Government
Critics argue that they slow down decision-making and create conflict. Evaluate the criticisms, and explain the justification for continuing the Madisonian model.
October 18, 2012

French
Merci Mme!!!
October 17, 2012

French
Thank you!! Was that all that needed correcting?
October 17, 2012

French
Can someone correct my paragraph? Write a good, 6 sentence paragraph using both the passé compose and imparfait describing a recent outing to a café or restaurant for breakfast or lunch. What did you order? How was the restaurant? La semaine dernière je ...
October 17, 2012

college chemistry
Please be specific! Briefly explain whether each if the following procedural errors would result in a high, low, or an unchanged calculated mass of Ca2+ in the analyzed tablet. a)a student had difficulty decanting the supernatant solution from the test tubes in step 9, causing...
October 15, 2012

college chemistry
a student determined the Ca^2+ ion content of a 100mL sample of calcium-fortified orange juice. After adding 2.0M HCl solution to the sample, the student filtered the juice to remove the pulp and other particulate matter. Then the tudent added Na2CO3 solution to precipitate ...
October 8, 2012

college chem
Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire solid in the crucible ...
October 8, 2012

Physics
An object is thrown vetically upward with an initial velocity of 14.7 m/s.How long does it take for the object to be 9.8 m from its initial position?What is the instantaneous velocity at 9.8 m from its initial position. Explain why two answers arise.
October 8, 2012

Chem II/College
Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire solid in the crucible ...
October 7, 2012

Biology
Scientists observe a newly established population of sexually reproducing plants growing on the shore of a small island. An observable trait of the plant has two possible phenotypes. It is determined by a single gene, with the dominant allele having complete dominance over the...
October 3, 2012

ENGLISH
Briefly describe Poe’s requirements for the short story genre.
October 2, 2012

College Chemistry
how would you prepare 175.0ml of .150 m agno3 solution starting with pure agno3
September 27, 2012

college physics
An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 6.5 N; a second force has a magnitude of 3.9 N and points in the negative y direction. Find the direction and magnitude of the ...
September 24, 2012

ENGLISH
Read the following passage. In 3–5 sentences, identify who wrote it. Support your choice with details about the content or style of the passage. "One day, when all our people were gone out to their works as usual, and only I and my dear sister were left to mind the ...
September 23, 2012

ENGLISH
is it the star spangled banner
September 23, 2012

ENGLISH
6. The following words share a denotative meaning. Which one has a negative connotation? (1 point) confident certain decisive demanding ~ 7. Read the following Chippewa song. Identify its purpose. A loon I thought it was But it was My love's splashing oar. (1 point) to ...
September 23, 2012

Physics
A tall strongman of mass m = 93 kg stands upon a scale while at the same time pushing on the ceiling in a small room.If the scale reads 1062 N (about 239 lb), what is the magnitude of the normal force that the ceiling exerts on the strongman?
September 21, 2012

Physics
A mass with M = 122kg is attached to the bottom of a block-and-tackle pulley system.How much tension force is needed to keep the mass at its current position?
September 21, 2012

Physics
A car travels at 64 mi/h when the brakes are suddenly applied. Consider how the tires of a moving car come in contact with the road. When the car goes into a skid (with wheels locked up), the rubber of the tire is moving with respect to the road; otherwise, when the tires roll...
September 21, 2012

Physics
An elevator is moving at 1.1 m/s as it approaches its destination floor from below. When the elevator is a distance h from its destination, it accelerates with a = −0.55 m/s2,where the negative sign indicates a downward vertical direction. Find h.
September 21, 2012

Calculus
Determine the polar form of the complex number 3 - 2i. Express the angle theta in degrees, where 0 < theta < 360°, and round numerical entries in the answer to two decimal places. 326.31(cos 326.31° – isin 326.31°) 3.61(cos 326.31° &#...
September 21, 2012

US Government
ideas on how to answer these?
September 18, 2012

US Government
help me answerthe question please. some ideas.
September 18, 2012

US Government
Explain how separation of powers and checks and balances reflect the founders' views of human nature and power in government. Discuss two other influences on the development of the U.S. Constitution
September 18, 2012

Calculus
Find the polar coordinates of (8, –8) for r > 0.
September 17, 2012

Pre-calc
1. Find the polar coordinates of (8, –8) for r > 0. 2.Find the rectangular coordinates of (9, 150°)
September 17, 2012

phy
A jet has a speed of 500m/s relative to the air in which it flies and is traveling north. There is a crosswind blowing from west to east at 100m/s. What compas heading does the plane appear to fly toward?
September 16, 2012

algebra
solve the inequality and write the solution set using interval notation. 4x+7 <2x+5 _____ -3
September 15, 2012

Chemistry
Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.
September 12, 2012

Chemistry
Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.
September 12, 2012

Chemistry
Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.
September 12, 2012

Math
The car in the figure below travels a distance of 745 m along the track, and the driver finds that she has traveled through an angle of 475°. What is the radius of the track?
September 6, 2012

Physics
The car in the figure below travels a distance of 745 m along the track, and the driver finds that she has traveled through an angle of 475°. What is the radius of the track?
September 6, 2012

Chemistry (quick clarification please?)
Is 50 ml of a 50 mM solution of NaCl the same concentration as 100 ml of a 100 mM solution of NaCl?
September 5, 2012

College Biology help!
Is this true? Explain. To make a 100 osmolar solution of magnesium chloride, 60g of the salt are placed in a liter of water.
September 5, 2012

algebra
3x/y - 5
September 3, 2012

Calculus
TWO examples of each of the following: two sided limits and theorem on limits (SUM, difference, product, quotient, nth root, ).
August 29, 2012

Algebra
Hi! Just want to ask if 1/x-1 - x/x-1 equal to 1? That is what I got when I solved it. Thanks.
August 13, 2012

Algebra
(a^2 - 4a)/(a^2-a-6) minus (a-6)/a^2-a-6)
August 13, 2012

Algebra
Kindly solve this and give its restriction. (5-xy)/(9z) - (14+8xy)/(9z)
August 13, 2012

Algebra
Simplify the rational expression and write the restriction for the simplified rational expression. x^3 - 8 ----------------------- x^2 + xy - 2x - 2y
August 5, 2012

Algebra
The perimeter of a heptagon is 9a^2s ft. The perimeter of a triangle is 6a^6b^2s ft. Find the ratio of the perimeter of the heptagon to the perimeter of the triangle.
August 5, 2012

AP World History
How did rum play a role in the American Revolution?
August 2, 2012

Math
A rectangular sandbox has a length of 60 inches, a width of 40 inches, and a depth of 6 inches. What is the volume in cubic inches?
August 2, 2012

chemistry
What does 1.5 fold dilution and 2.5 fold dilution mean?
July 26, 2012

Math
I just did.. Thanks! Was it 3665?
June 21, 2012

Math
Oh, sorry. It was 2, not 3 ..
June 21, 2012

Math
i am a four digit numeral number between  3000 and 4000.My ones digit is 3 greater than my thousands digit.The two other digits are the same.If the sum of my digit is 20,what number am i?
June 21, 2012

Math
I am number greater than 70 000 but less than 90 000.My ones digit is the only even prime number.My tens digit id the same as my ones digit.My ten thousands digit is four times my ones digits.Both my hundreds and thousands digits are half the ten thousands digits.What number ...
June 6, 2012

Math
What is the least number that can be formed using 4 9 2 1 3 0 6?
June 6, 2012

Math
I am number greater than 70 000 but less than 90 000.My ones digit is the only even prime number.My tens digit id the same as my ones digit.My ten thousands digit is four times my ones digits.Both my hundreds and thousands digits are half the ten thousands digits.What number ...
June 6, 2012

Math
What is the greatest 7 digit number without repeating any digit?
June 6, 2012

Math
i am a 4 digit number between 3000 and 4000.My ones digit is twice my thousands digit.My hundreds digit is the same as my ones digit and my tens digit is one less than the hundreds digit.If the sum of my digit is twenty,what number am i?
June 5, 2012

GEOMETRY
Length of the diameter of a circle with the endpoints A(4, -3) and B(4, 3)
May 30, 2012

Chemistry
I have liquid concentrated HCl (37%w/w) To prepare 100ml of 10g/L HCl as a solvent medium, is it acceptable to just weigh 1g of liquid conc HCl and dilute to 100ml with water? What volume of conc HCl should we use to make 100ml of 10g/L HCl?
May 28, 2012

writing
Write a journal entry describing a day in the life of a snake in the wild from the snake's point of view. At least 5 sentences
May 17, 2012

English
would "the only heroic thing is the sky" be personification?
May 17, 2012

Math :(
Great answer and great way to explain. I would do the same thing. This is easy for me
April 30, 2012

Math riddle
122
April 26, 2012

Accounting
Please prepare the following journal entries. Indicate which account should be debited and which account should be credited along with the dollar amount of the debit and credit. a) Investors invested $100,000 in exchange for 10,000 shares of common stock. b) Company paid a ...
April 19, 2012

Chemistry
A 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2O4=128.09 g/mol]
April 16, 2012

Chemistry
How would you find the pH of a solution prepared by mixing 50 mL of 0.125 M KOH with o.050 L of 0.125 M HCl?
April 16, 2012

physics 2
A concave mirror has a focal length of 27.0 cm. The distance between an object and its image is 46.5 cm. Find the object and image distances, assuming the following. (a) that the object lies beyond the center of curvature do = di = (b) that the object lies within the focal ...
April 10, 2012

hca/210
examples of position in healthcare for the four functions of management
April 9, 2012

Physics 2
The average intensity of light emerging from a polarizing sheet is 0.807 W/m2, and the average intensity of the horizontally polarized light incident on the sheet is 0.972 W/m2. Determine the angle that the transmission axis of the polarizing sheet makes with the horizontal.
April 5, 2012

math
The average of two numbers is 34. The first number is three times the second number. what are the two numbers?
April 1, 2012

Math
Jillian must average at least 90 on two quiz scores before she can move to the next skill level. Jillian got a 92 on her first quiz. What scores could Jillian get on her second quiz in order to move to the next skill level? How could I answer this is an two-step inequality form?
March 27, 2012

Physics
A 30.0 kg box is being pulled across a carpeted floor by a horizontal force of 230 N., against a friction force of 210 N. Calculate the acceleration of the box and find the x and y components of the acceleration of the box. Align the positive direction with the normal force ...
March 26, 2012

Physics
Thanks! I did get this far, but it didn't seem right!
March 26, 2012

Physics
A loud speaker of mass 24.0 kg is suspended a distance of h = 2.00 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 3.50 m. What is the tension in each of the cables?
March 26, 2012

Science
What does a thermohygrometer do?
March 25, 2012

Chemistry
How long can we use a bottle containing anti-bumping granules? Can it be used indefinitely?
March 23, 2012

Chemistry
I know that it's made up of one molecule from fructose and one molecule from glucose. i think it has a 12 Carbon atom ring... but that's really all I know
March 22, 2012

Chemistry
Can you label all the functional groups of the Sucrose Molecule?
March 22, 2012

Probability
Six marbles are chosen without replacement from a box containing 10 red, 8 blue, and 3 yellow marbles. Let X be the number of blue marbles chosen. a) Find the probability distribution of X. b) Find the mean of the random variable X
March 22, 2012

Probability
7) Suppose that you roll a pair of standard 6-sided dice a total of 42 times. What is the probability that you will get a sum of 5 at least four times?
March 22, 2012

Chemistry
What is the function of Compressed Air in GC-FID (i.e. Gas Chromatography-Flame Ionization Detector)?
March 18, 2012

Science-Chemistry
In the following test for Sulfated Ash, ammonium carbonate solution was added. What is the purpose of adding ammonium carbonate solution? Heat a silica crucible to redness for 30 minutes, allow to cool in a desiccator and weigh. Place 1g of the substance in the crucible and ...
March 18, 2012

science
Who would have to overcome inertia to move the ball, a golfer or a soccer player?
March 15, 2012

Chemistry
during a molar volume of oxygen experiment indicate how each of the following errors would affect (increase, decrease, or no change) your calculated value for the molar volume of O2 at STP. 1.) Your sample was not completely decomposed. 2.) After you finish heating sample & ...
March 3, 2012

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