Sunday

November 29, 2015
Total # Posts: 101

**Analytical Chemistry**

I have a 0.00156 M solution of CuSO4*5H2O in water (from 0.0398 g of CuSO4*5H20 in 100 mL of water). How would I calculate the ppm of Cu of that solution from that information? Now if I were to find ppm of Cu in different aliquots of this stock solution (5 mL, 10 mL, etc.) how...
*November 16, 2015*

**Analytical Chemistry**

Now if I were to find ppm of Cu in different aliquots of this stock solution (5 mL, 10 mL, etc.) how would I go about that?
*November 15, 2015*

**Analytical Chemistry**

I have a 0.00156 M solution of CuSO4*5H2O in water (from 0.0398 g of CuSO4*5H20 in 100 mL of water). How would I calculate the ppm of Cu of that solution from that information?
*November 15, 2015*

**Finite Math **

A bowl contains 10 red balls, 5 blue balls, and 8 green balls. A woman selects balls at random without looking in the bowl. How many balls must she select to be sure that she has at least one ball of each color?
*November 14, 2015*

**Physics**

The school bus slows from 60km/h to 40km/h when entering the scholl zone. a. Calculate the conversation of these speeds from km/h to m/s. b. Given that this change of speed occured over 8 seconds, calculate the average deceleration of the bus. My work... a.60/3.6=17m/s 40/3.6=...
*November 9, 2015*

**Chemistry**

Write a balanced net ionic reaction for the reduction of cupric ion (Cu2+) by hydroxylamine (NH2OH) in acid solution, using the smallest integer coefficients. Im not too sure of what is reacting here to reduce the Cu2+. Help?
*October 21, 2015*

**Chemistry**

A 10.0 mL aliquot of a flouride sample solution was diluted to 250 mL in a volumetric flask. The F- concentration of this DILUTED sample was determined with a F- ion selective electrode and found to be 7.1 mg/L. What is the concentration of F- in the original, undiluted sample...
*October 19, 2015*

**Chemistry**

I need a balanced chemical equation for the titration of potassium iodate (KIO3^2-) and sodium thiosulfate (Na2S2O3^2-). This is what I have, but I was wondering if I should cancel the spectator ions: Na2S2O3 (aq) + 2KIO3 (aq) --> K2S2O3 (aq) + 2NaIO3(aq)
*October 5, 2015*

**Chemistry**

Its some randomly generated question in preparation for a lab with normal sized vol. flasks. But yes, I agree, that would be a bit awkward to have a 4.0 mL flask. Haha Can explain the unit conversions in the 75 x 4/1000 you posted?
*October 1, 2015*

**Chemistry**

Caluculate the mass of ferrous ammonium sulfate (Fe(NH4)2(SO4)2.6H2O) you would need to add to a 4.0 mL volumetric flask to make a solution that is 75 ppm. I've already identified that Fe is 14.24% of the Mohr's salt, but how would the conversion of that go to ppm? Ppm...
*October 1, 2015*

**Physics**

A 2.00 kg box slides down a rough incline plane from a height h of 1.99 m. The box had a speed of 2.77 m/s at the top and a speed of 2.34 m/s at the bottom. Calculate the mechanical energy lost due to friction (as heat, etc.) If I were to calculate the energy lost, it would be...
*September 30, 2015*

**chemistry**

The number of moles of solute in a bottle containing 300 mL of 0.178 mol/L sodium sulfite solution is
*March 16, 2015*

**chemistry**

The concentration of a solution made by diluting 10.0 mL of 0.685 mol/L NaBr to 300 mL is
*March 16, 2015*

**Science, HELP!!! URGENT!**

a) If the silty clay loam soil profile is 1 meter deep, how much plant available water (cm) can potentially be held in the upper meter of soil? b) If the silty clay loam profile is 40 inches deep, how many inches of plant available water can potentially be held in the upper 40...
*October 12, 2014*

**Geometry**

A triangle has side lengths 3in, 4in, and 6in. The longest side of a similar triangle is 15in. What is the length of the shortest side of the similar triangle?
*September 8, 2013*

**Geometry**

<1 and <2 are alternate interior angles formed by two parallel lines and a transversal. If m<2=68, what is m<1?
*September 7, 2013*

**Geometry**

A 2ft. vertical post casts a 16in. shadow at the same time a nearby cell phone tower casts a 120ft. shadow. How tall is the cell phone tower?
*September 7, 2013*

**geometry**

you have 30yd2 of carpet. you want to install carpeting in room that is 20ft long and 15ft wide, do you have enough carpet? explain?
*July 8, 2013*

**Geometry**

For the given dimensions, find the area of each figure. If necessary round to the nearest hundredth. 1.Rectangle with base 4m and height 2cm. 2. Square with side length 3.5 in. 3. Circle with diameter 9cm.
*July 8, 2013*

**Math**

To the nearest tenth, find the perimeter of ABC with vertices A(-2-2), B(0,5) and C(3,-1).
*July 8, 2013*

**math**

I'm confused on how to do this. algebra M(X,Y) is midpoint of CD with endpoints C(5,9) and D(17,29). Find the values of X and Y. Show the MC = MD.
*July 6, 2013*

**Math**

AB has endpoints A(-3,2) and B (3,-2) Find the coordinates of the midpoint of AB Find AB to the nearest tenth.
*July 6, 2013*

**math**

How do you do this? AB has endpoints A(-3,2) B(3, -2) Find the coordinates of the midpoint of AB. Find AB to the nearest tenth.
*July 6, 2013*

**Physics**

How long in seconds does it take for a car accelerating at 3.5m/s2 to go from rest to 120km/hr
*February 27, 2013*

**SCIENTIFIC NOTATION (ALGEBRA**

9.04 x 10 to the 9th power
*February 27, 2013*

**Psychology**

Do Psychologist adhere to the same code of ethics as a social worker? What is the number 1 ethical concern of a psychologist? What area of malpractice do psychologist face most.
*February 18, 2013*

**physics**

In her physics lab, Jessica rolls a 11-g marble down a ramp and off the table with a horizontal velocity of 1.38 m/s. The marble falls in a cup placed 0.45 m from the table's edge. Find the table's height.
*February 6, 2013*

**Physics Help, Please**

wavelength = .96 m speed = 345.6 m/s
*November 12, 2012*

**Principles Of Management - Decision Making**

a
*August 13, 2012*

**literature**

I just took the test and the answer that I said is right. If you just took the test and you said the answer is a principle of ethics, you must have got it wrong.
*July 22, 2012*

**literature**

Hate to tell you,but, your both wrong. The answer is a tool of correction. Have you not read the scripture in the bible that says "Spare the rod, spoil the child.
*July 22, 2012*

**statistics**

E +/-10%
*July 2, 2012*

**kinetic theory**

. What phase is water in at 100°C and 2 atm pressure?
*April 4, 2012*

**acids and bases**

HI is a strong acid, and CsOH is a strong base. What does "strong" mean?
*April 4, 2012*

**Math**

as the weight held by a spring increases, the length of the spring increase proportionally. suppose a 2-lb weight stretches a spring to 15 in., and a 12-lb weight stretches the same spring to 20 in. what is the length of the spring with no weight attached?
*April 4, 2012*

**ENglish**

Can you look over this esssay and tell me what grade you think it deserves?
*January 30, 2012*

**chemistry**

J/atom
*December 1, 2011*

**chemistry**

how many gram of uranium will radiate the equivelent energy output of a major earthquake measuring 10^19J? Energy from fission of uranimu 223 is 10^-12.
*December 1, 2011*

**pre algebra**

Thanks so.much i really needed help!!!🏆🏆i thought it was wrong so i looked it up.....it was right doe😊😊
*November 30, 2011*

**physics**

Vy= sin30(200)=100m/s t=(Vf-Vi)/a, t=(0-100)/9.81, t=10.3s Sy=Vy(t), Sy= 100(10.3), Sy= 1019m
*September 25, 2011*

**adult education**

How do educational philosophies and theories affect the statement of purpose and goals, curriculum, instruction, and values? Discuss.
*August 17, 2011*

**statistics**

A sample of the number of study per week of college students is collected. Some of the sample results of the survey are given in the following table Study Hr 4, 10, 20,24, 34, 36, 42 Z score -2.5,-1.75,-0.5,0, 1.25,1.5,2.25 P. Rank 10, 25, 35, 40, 50, 75 95 Q1- The mean study ...
*December 21, 2010*

**math**

Verify that f(x) = x^3 − 2x + 6 satisfies the hypothesis of the Mean-Value Theorem over the interval [-2, 3] and find all values of C that satisfy the conclusion of the theorem.
*December 19, 2010*

**math **

If O is 31 degrees and T is 121 degrees then what is the measure of angle A?
*December 15, 2010*

**Calculus**

Verify that the hypotheses of the Mean-Value Theorem are satisfied for f(x) = √(16-x^2 ) on the interval [-4,1] and find all values of C in this interval that satisfy the conclusion of the theorem.
*November 29, 2010*

**math**

how to write two equivalent fractions with 3/4>5/18 4/9>1/6 4/17<11/34 4/22=2/11
*November 22, 2010*

**Science**

The annoying sound from a mosquito is produced when it beats is wings at the average rate of 600 wingbeats per second. What is the frequency of the sound waves?
*October 2, 2010*

**Science**

A marine Weather reports waves along the shore that are eight seconds apaart. The frequency of the waves is therefore___ Hertz.
*October 2, 2010*

**Science**

The perio of a 440 Hertz sound wave is______ seconds.
*October 2, 2010*

**Science**

What are at least five findings and assumptions that make up the model of the behavior of electricity?
*October 2, 2010*

**Science**

Using the analogy of the air capacitor, what do you think might be the cause of charge motion during capacitor discharging?
*October 2, 2010*

**Science**

Consider a circuit with a capacitor, battery, wire, and bulb. Describe the source(s) charge during capacitor charging.
*October 2, 2010*

**Science**

Consider a circuit with a capacitor, battery, wire, and bulb. Describe the source(s) of charge during capacitor discharging.
*October 2, 2010*

**Science**

1. What is the direction of charge flow when charging a capacitor? When discharging a capacitor? What is your evicence?
*October 2, 2010*

**Science**

1. What is the direction of charge flow when charging a capacitor? When discharging a capacitor? What is your evidence? 2. Consider a circuit with a capacitor, battery, wire, and bulb. Describe the source(s) of charge during capacitor discharging. 3. Using the analogy of the ...
*October 1, 2010*

**Science**

1. A Marine Weather station reports waves along the shore that are eight seconds apart. The frequency of the waves is therefore ___Hertz. 2. If a mosquisto beats its wings at the average rate of 600, what is the frequency? 3. The period of a 440 Hertz sound wave is ____ seconds.
*September 30, 2010*

**Science**

In metric measurements, what is the meaning of the abbreviations: Dg, Dm and Hm? Why are the first letters written as capitals?
*September 19, 2010*

**Math**

Solve each equation. |4x-2|+1=3 4x-2+1=3 4x-1=3 I get 4x=4 where x=1 But the answer is suppose to be 0,1 Where do you get the 0 from?
*September 2, 2010*

**math**

Solve each equation. What am I doing wrong because the answer is suppose to be 11/2 and I don't get the answer. Here's what I'm doing... Problem: 2x+1/4-3x-4/5=1/2 I get: 10x+5-12x-16=10 Which gives me -2x=21 My answer is -21/2 the correct answer is suppose to be 11/2
*September 2, 2010*

**Physics**

Two vectors with magnitudes of 6 meters and 8 meters cannot have a resultant of: 48 meters 14 meters 10 meters 2 meters
*August 13, 2010*

**physics**

A bicyclist going south 5m/s passes a bicyclist going north a 5 m/s, they have the same?
*August 13, 2010*

**College Math**

I have been struggling with this problem I cannot get the right answer. Please give me the steps to solve this problem. Let f(x)= (2x-9)(x^2 + 6) (A) Find the equation of the line tangent to the graph of f(x) at x=3 (B) Find the values(s) of x where the tangent line is ...
*June 19, 2010*

**Basic College Math**

What numbers in a math problem adds up to 331/3?
*May 4, 2010*

**ETH**

is it difficult to accurately measure prejudice?
*April 11, 2010*

**CP Physics**

Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of 70 N to move it up. ...
*April 8, 2010*

**chemistry**

when 10.0 grams of an unknown substance is dissolved in 50. grams of water, the new freezing point becomes -3.00C. What is the molar mass of the compound? For this question can some one tell me the formulas I need to solve for this problem and I can fill in the rest
*March 7, 2010*

**Algebra**

How to factor quadratic equations when the exponent is the unknown? See example: 20/(1.10)^x = 40
*February 27, 2010*

**business**

Assume that at the beginning of 2000 Speedy Delivery a Fed Ex competitor purchased a 737 aircraft at a cost of 60,000,000 Speedy Delivery expects the plane to remain useful for 5 years (5 million miles) and to have a residual value of 5,000,000 Speedy Delivery expects to fly ...
*January 5, 2010*

**Accounting**

Assume that at the beginning of 2000, Quick Travel, a FedEx competitor purchased a used Boeing 737 aircraft at a cost of 60,000,000. Quick Travel expects the plane to remain useful for 5 years (5 million miles) and to have a residual value of 5,000,000. Quick Travel expects to...
*January 1, 2010*

**accounting**

I continue getting the wrong totals can you please help me solve this problem and give me the correct formula and Journal entries. On Jan 1 2004 Brown Airways purchased an airplane for 34,450,000. Brown airways expect the plane to remain useful for 6 years and have a residual ...
*January 1, 2010*

**Business Accounting**

Given the following data by how much would taxable incoome change if LIFO is used rather that FIFO Beg Inv. 3500 unit at 60 units sold 8100 Purchases 6500 units at 70
*December 30, 2009*

**Accounting **

When you apply the lower- of- cost- or market rule, market values generally refers to. which one current sales FIFO LIFO current replacement
*December 30, 2009*

**college**

I need help to journalize these transactions for accounting. Samantha purchased inventory costing 125,000 and sold 70% of the goods for 162,500 all purchases and sales were on account She later collected 25% of the accounts receivable Which is the perpetual inventory system ...
*December 30, 2009*

**Chemistry **

How can you prove that mass is being conserved when adding baking soda to vinegar?
*December 24, 2009*

**physics**

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? Is A the correct answer? a) That there is no reaction force-the net force on the object is zero, so the ...
*November 23, 2009*

**physics**

Is it true that when a baseball player hits a home run, the baseball receives a greater impulse from the bat than the bat does from the ball? My thinking is that everything should be equal so I would answer this question false-am I correct?
*November 23, 2009*

**physics**

Is it true that when a baseball player hits a home run, the baseball receives a greater impulse from the bat than the bat does from the ball?
*November 23, 2009*

**physics**

Is this a trick question? In order to move a heavy object you must push against it with a larger force than it pushes on you. Is this true or false?
*November 23, 2009*

**physics**

Two vehicles with the same mass collide and lock together traveling 28 m/s at 37 degrees north of east after the collision. How fast was the car traveling that was heading north while the other vehicle was traveling east?
*November 23, 2009*

**statistics**

A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the distribution of ...
*November 7, 2009*

**Alegbra**

What is the perfect squaredigits sum 4
*November 4, 2009*

**math**

make a tally chart for the number of students in third fourth and fifth grade classes : 26 25 27 27 26 28 27
*October 15, 2009*

**Foundations of Research**

Develop a short questionnaire and Analyze the responses and comment on the validity and reliability of your questionnaire.
*September 25, 2009*

**CJS 240**

Please write a 300 to 350 word response explaining how the threat of punishment either does or does not deter juvenile delinquency. Provide examples of general deterrence, specific deterrence, and situational crime prevention strategies. Additionally, identify which concept or...
*May 6, 2009*

**jumble newspapet puzzle**

the couple saved for a rainy day by avoiding this the scrambles letters 2 words snatoeiedkggt first word 7 letters second word in quotes 6 letters
*March 15, 2009*

**2nd grade fraction question**

1 out of 4 or 1 out of 2
*March 6, 2009*

**2nd grade fraction question**

is 1-4or1-2 is more
*March 6, 2009*

**Fractions From greatest to least**

fractions from least to greatest 3/10,1/3,2/5
*November 19, 2008*

**Chemsitry**

For the following equilibrium process: CO2 + H2 = CO + H2O The equilibrium concentrations of reacting species are: [CO]= .050 M; [H2]= .045 M; [CO2]= .086 M; [H2O]= .040 M. (a) Calculate Kc for the reaction (b) If we add CO2 to increase its concentration to 0.50 mol/L, what ...
*August 16, 2008*

**LITERATUE**

if this be error and upon me proved,i never writ, nor no man ever loved
*August 4, 2008*

**PE**

Not exactly a question but still considered as homework i need help with. Thanks in advance for answering if you do, its a great help. Ive been given a task to survey people about excercise and fitness. The answers dont have to be long but please atleast write a sentence for ...
*July 1, 2008*

**math**

if a have 2 balls break half of one and cut that in half and cut that in half wat number of balls with i have?
*May 20, 2008*

**statistics**

A maker has the opportunity to purchase several acres of land that is divided up into several lots for building single-family homes. It is known that the average sale price of all of the lots is $80,000 and the standard deviation of the sale price is $12,000. What can you say ...
*May 16, 2008*

**4th grade math**

Estimating Products Example 7multiply42 is close to 7 multiply ?
*February 10, 2008*

**Spanish**

meaning de Sra
*September 30, 2007*

**culture**

Elizabeth Fernea is a Euro-American, (upper) middle class woman accompanying her anthropologist husband to a very foreign setting in the mid-1950s. What have you learned so far about some of the differences between the ways people live in Iraq and the way you live? What do you...
*June 11, 2007*

**culture**

If an archaeologist of the future found your perfectly preserved garbage, what would the “garbologist” find and what do you think it would say about you and your way of life? (You don’t have to get real personal!) This question is asking what YOUR garbage says ...
*June 11, 2007*

**business law**

Hi can you tell me if i am opening a videogame company. What will be my LLC, reason for selecting that entity. Go over the pros and cons for a business to select an LLC over the other possible business entity types. Then ask, what business entity type is most suited for a ...
*May 8, 2007*