Wednesday
August 27, 2014

Posts by Stacy


Total # Posts: 463

physics
great, thank you so much!
February 17, 2011

physics
A rock is thrown from a cliff top at 18m/s, 25 degrees above the horizontal. It lands on the beach 4.2 seconds later. a) What is the height of the cliff? b) Hor far from the base of the cliff did the rock land?
February 17, 2011

8th grade science
Why can high blood viscosity have negative effects? Also, name the medical condition that people can develop with high blood viscosity.
February 17, 2011

math
The distance between (0,0) and (0,1) on a certain coordinate plane is 1cm. The distance between (0,0)and (1,0) on that same coordinate plane is 1cm. What is the distance between (0,0) and (1,1). Explain the answer
February 17, 2011

math
the sign reads: receive a $10 gift card for every $50 spent. 1) If your reward is $10, what do you know about the amount of your purchase? 2) Give three possible amounts if your reward is $20. 3) What should you do if your total purchase is $98? Explian answer.
February 16, 2011

math - please help
In a gift wrapping department, a customer can choose from x different papers, y different ribbons, and z different greeting cards. There are 160 different paper, ribbon, and greeting card combinations. List three of the possible combinations.
February 3, 2011

psychology
Brain teaser help please! Bedspread Agent and also ii_________ii oo oo
February 1, 2011

psychology
Brain teaser help please! Bedspread Agent and also ii_________ii oo oo
February 1, 2011

factoring quadratic expression
w^2+2w+1
January 26, 2011

factoring quadratic expression
w^2+2w+1
January 26, 2011

math
I have trouble finding the solution for this: Find the equation of the line through (2,a) and (4,b).
January 23, 2011

biology
If I was 100% water what would my volume be?
January 22, 2011

chemistry
If I was 100% water what would my volume be?
January 22, 2011

Math
Gerald and Michelle went on a 24 mile bike ride. By lunchtime they had ridden 5/8ths of the total distance. how many miles did they have left to ride after lunch ?
January 10, 2011

chemisty
Thanks! and No Stacy is not my real name, although Shirley is my mothers name LOL!
December 14, 2010

chemisty
Posted by STACY on Monday, December 13, 2010 at 7:56pm. Consider an aqueous solution prepared from 250.0 mL of water and 1.27 g of potassium bromide. Express the amount of potassium bromide in this solution in terms of (a) mass percent (b) mole fraction (c) molarity assume the...
December 14, 2010

chemistry
how many grams of sodium carbonate are needed to prepare 0.250 L of an 0.100 M aqueous solution of sodium ions? well normally you go moles=grams/molar mass than M= moles/L but when looking for grams? what do you do........multiple .250 by .100 than divide by the molar mass of ...
December 14, 2010

CHEMISTRY
Soooo Moles= MxL (0.100M)(0.250L)=0.025 than multiply moles by molar mass (0.025)(105.988)= 2.65g So my answer is 2.65g but the book says it's 1.32g? What am I overlooking.....man I hate chemistry =(
December 13, 2010

CHEMISTRY
how many grams of sodium carbonate are needed to prepare 0.250 L of an 0.100 M aqueous solution of sodium ions? well normally you go moles=grams/molar mass than M= moles/L but when looking for grams? what do you do........multiple .250 by .100 than divide by the molar mass of ...
December 13, 2010

CHEMISTRY
I surely do, and don't call me Shirley! LOL yessss i'm sorry I don't know much about chemistry that's why i'm here!! 1. Mass percent= grams solute/100solution 1.27g/250.0mL = 5.08x10^-03 is my answer but the correct one is 0.505% 2. Mole fraction= moles ...
December 13, 2010

CHEMISTRY
Consider an aqueous solution prepared from 250.0 mL of water and 1.27 g of potassium bromide. Express the amount of potassium bromide in this solution in terms of (a) mass percent (b) mole fraction (c) molarity assume the density of the solution is equal to that of water, 1.00...
December 13, 2010

chemistry
Describe how a 250.0 mL aqueous solution of 1.50 M MgCl2 is prepared from a stock solution of 6.00 M MgCl2. ANSWER: Measure 62.5 mL of the stock solution into a container and dilute to 250.0 mL so what i need explained is where did 62.5 mL come from?
December 13, 2010

chemistry........help!! =)
How many grams of FeSo4 are required to prepare 0.50 L of a 0.010 M FeSO4 solution? I don't need the answer just shown how to do it! thanks
December 13, 2010

Pre-Calculus
What is the present value of a $1000 bond which pays $50 a year for 10 years, starting one year from now? Assume interest rate is 6% per year, compounded annually
December 10, 2010

chemistry
Ok Thanks =)
December 8, 2010

chemistry
That consists of 30.0g NaCl/(30.0g NaCl + 970 g H2O) ........... Where did this # come from 970 g H2O?
December 8, 2010

chemistry
Determine the mass of NaCl in 1.0 L of 3.0 % by mass aqueous solution of sodium chloride. The density of the solutions is 1.10 gmL-1 please explain all the steps, thanks!
December 8, 2010

chemistry
4.23/184.113= 0.0230 0.0230x2= 0.046 1.21/119.002=0.010167 0.046+0.010167=0.056167 0.056167x6.02E23 = 3.38x10E22 -----is this the right answer?
December 8, 2010

chemistry
Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks! chemistry - DrBob222, Wednesday, December 8, 2010 at 7:57pm ...
December 8, 2010

chemistry
4.23g MgBr2 Moles= grams/molar mass 4.23/184.113 = 0.023 moles 1.21g KBr Moles= grams/molar mass 1.21/119.002 = 0.033 and than what? I add those two #'s together? 0.033 + 0.023 = 0.033 and I dont know what you mean by 1 mole of Br- ions will contain 6.022e23 ions where did...
December 8, 2010

chemistry
Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks!
December 8, 2010

science
Crystal can ride her bike 10 miles in 2.1 hours. What is her velocity?
December 6, 2010

chemistry
What volume of a concentrated HCl solution, which is 36.0% HCl by mass and has a density of 1.179 g/mL, should be used to make 4.60 L of an HCl solution with a of 1.9? HELP!!!
December 6, 2010

chemistry
Find the percent by mass of sodium chloride in a 1.35 M NaCl solution. The density of the solution is 1.06 g/mL..............how do I go about doing this question thanks!
December 4, 2010

anatomy and physiology
A 67-year-old man is diagnosed with cancer and subsequently undergoes chemotherapy. As an expected side effect of chemotherapy, his bone marrow stops functioning. What is a potential consequence of this loss of function?
December 3, 2010

chemistry
thanks........but that didn't help me at all =(
December 1, 2010

chemistry
How do I draw the lewis structure for [PF5Cl]- i'm getting confused on this one!! Please explain answer Thanks =))
December 1, 2010

VB programming
Okay, I understand what you've advised somewhat, but was wondering if you can give a simple example of the line segments. I kind of based this off of a bar chart I created. Thanks..
December 1, 2010

Chemistry
In a calibration of a calorimeter, 50.0 g of water at 60.0 *C is added to 50.0 g of water at 20.0 *C to give a mixture at 39.0 *C. What is the heat capacity of the calorimeter used in this experiment? If the calorimeter has a mass of 5.4g, what is its specific heat?
November 29, 2010

Chemistry
Calculate the final temperature when 20.0 g at 60 *C iron is put into 50.0 ml of 20 *C water. The specific heat of iron is 0.449 J/g*C and that of water is 4.184*C. (Assume no heat is lost to the container or the surrounndings.)
November 29, 2010

Physics
Two masses are suspended from a pulley as shown in the figure . The pulley itself has a mass of 0.30 kg, a radius of 0.20 m, and a constant torque of 0.30 m \cdot N due to the friction between the rotating pulley and its axle. What is the magnitude of the acceleration of the ...
November 28, 2010

Programming
Write a program that allows the user to display a budget as a pie chart. After the user enters numbers into the four text boxes a presses the button, the pie chart should be displayed. When I push the button for my code it does not display anything. Could you help me ...
November 28, 2010

Chemistry
C15H30 is a hydrocarbon that reacts with oxygen gas to give carbon dioxide and water. Calculate the mass of water (grams) formed when 859.64 grams of the hydrocarbon reacts with the oxygen gas. can someone please show me how this is done thanks
November 25, 2010

chemistry
Wha??
November 20, 2010

chemistry.......help
the first one (a) I was suppose to write 6.36L of LiNO3 soooooo but ur M=moles/L I take 0.36/6.36L and get 0.0566 and i'm suppose to give the awnser in 2 significant figures which I think is 0.05 but it I got it wrong.......the anwser is M= 5.5x10-2 M what did i do wrong???
November 20, 2010

chemistry
calculate the molarity of each of the following solutions. Help!! (a) 0.36 mol of LiNO3 L of solution (b) 70.7 g C2H6O in 2.25 L of solution (c) 11.56 mg KI in 114.2 mL of solution
November 20, 2010

Chemistry
Acetic acid (CH3COOH) reacts with isopentyl alcohol (C5H12O) to yield the ester isopentyl acetate which has the odour of bananas. If the yield from the reaction is 45%, how many grams of isopentyl acetate are formed when 3.77 g of acetic acid and 7.46 grams of isopentyl ...
November 19, 2010

Chemistry
In an industrial process, the following reaction is carried out in the presence of a catalyst: C16H65 + Cl2 ¨ C16H65Cl12 Calculate the percentage yield if 164.57 grams of C16H65 are used in the reaction and 400.24 grams of C16H65Cl12 are produced.
November 19, 2010

chemistry........help!! =)
Thanks for making sense of it for me!!
November 17, 2010

chemistry........help!! =)
MaVa = MbVb can be used for the reaction between HCl and NaOH. Can it be used for the reaction between NaOH and H2C2O4 (oxalic acid, which can be found in rhubarb leaves, contains 2 acidic protons)? Explain your answer showing the balanced equation
November 17, 2010

physics
A stone tied to the end of a string, 80 cm long, is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 seconds what is the magnitude and direction of the acceleration of the stone?
November 16, 2010

MATH/208 University of Phoenix
I need the answers for week three, can anyone help?
November 8, 2010

Chemistry...Help!!
It's a question in Mastering Chemistry, I don't know how else to reword it? That's their words =( I did plug in those #'s and it came back wrong, but it doesnt show me the right anwsers....so I dunno??
November 6, 2010

Chemistry...Help!!
Help, exam on monday!!
November 6, 2010

Chemistry...Help!!
I don't even know how to start this...The valence electron configurations of several atoms are shown below. How many bonds can each atom make without hybridization? 1. Si 3S2 3P2 2. P 3S2 3P3 3. F 2S2 2P5
November 6, 2010

Physics
A rigid tank contains 1.20 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 28.5 atm to 5.30 atm. Assume the volume of the tank and the temperature of the gas remain constant during this ...
November 5, 2010

College Chemistry
Calculate the Molarity of the solution that contains 4.00 grams of NaOH in a total volume of 1500.0 mL. [Molar Mass NaOH = 40.00g, 1 Liter = 1000 mL]
November 5, 2010

chemistry
What is the molecular, ionic, and net ionic equations for Copper(II) sulfate + sodium phosphate?
November 3, 2010

chemistry
I need the molecular, ionic and net ionic equation for copper (II) acetate and sodium carbonate......help!
October 28, 2010

Chemistry
I need the molecular, ionic and net ionic equations for Potassium carbonate and hydroiodic acid........i'm clueless please help as much as you can!
October 28, 2010

Chemistry
ok so C = 19x 12.01 = 228.19 H = 97 x 1.001 = 97.097 Cl = 35 x 35.45 = 1240.75 =1566.82
October 22, 2010

Chemistry
What is the molecular mass of: C19H97Cl35
October 22, 2010

Medical Terminology
A patient states that he gets up three or more times per niht to void. What type of condition does this symptom indicate? A-Uremia B-Calculi C-Stricture D-Nocturia
October 22, 2010

Medical Terminology
A pyelogram was performed on a 43-year old male patient. The root word means? A-trough,basin,pelvis. B-ureter,urethra C-bladder,urine D-kidney,medulla
October 22, 2010

programming
No you are right. But I'm having trouble getting the correct coding for that step. Any ideas?
October 22, 2010

programming
write a program to calculate the amount of a server's tip given the amount of the bill and the percentage tip ovtained via input dialog boxes. The output should be a complete sentence that reiterates the inputs and gives the resulting tip. here is my attempt: Public Class ...
October 22, 2010

College Algebra
So once I have to convert sqrt of 40 and solve from there?
October 22, 2010

Physics!
Baseball player A bunts the ball by hitting it in such a way that it acquires an initial velocity of 1.9 m/s parallel to the ground. Upon contact with the bat, the ball is 1.5 m above the ground. Payer B wishes to duplicate this bunt, in so far as he also wants to give the ...
October 14, 2010

chemistry
I dunno......I hate chemistry!
October 13, 2010

chemistry
A laboratory procedure calls for making 400.0 mL of a 1.1 M NnO3 solution. What mass of NaNO3 (in g) is needed?
October 13, 2010

chemistry
so 114 ml is 0.114 L 1.85x 0.114 = 0.2109 ??
October 13, 2010

chemistry
How many moles of KCL are contained in 114 mL of a 1.85 M KCL solution?
October 13, 2010

chemistry
=0.125 moles not + that was a typo...
October 13, 2010

chemistry
Soooo 22.6/ 180.156 + 0.125 moles than 0.125/1.08L = 0.116 molarity??
October 13, 2010

chemistry
calculate the molarity of a solution in which 22.6g C6H12O6 is dissolved in 1.08L of solution
October 13, 2010

Physics
A biotech company produces a solution with an active biomass of 8.7604x10^6 cells per litre of solution. The solution is shipped by tanker truck with a volume of 4.16462x10^1 m3. How many cells are being sent per shipment, expressed to three significant figures?
October 3, 2010

Physics
How many m3 are there in 3.0475x10^5 cL, expressed to 3 significant figures?
October 3, 2010

Chemistry
mg is magnesium yes thats seawater sorry exavt is supposed to be exact
September 29, 2010

Chemistry
magnesium is a valuble metal used in alloys in batteries and in manufacture of chemicals it is obtaine mostly in sweater which is about 1.3g mg for every kilogram of sweater assume that the sweater has a density of 1.03g/ml calculate the volume of the sweater in liters to the ...
September 29, 2010

Chemistry
how many neutrons are in an element of mc where x =124 and y = 22
September 29, 2010

BIOLOGY
What are the CELL MEMBRANE PROTEINS ? What are the functions of the CELL MEMBRANE PROTEINS ?
September 27, 2010

Physics
Emily challenges her husband, David, to catch a $1 bill as follows. She holds the bill vertically, with the center of the bill between David's index finger and thumb. David must catch the bill after Emily release it without moving his hand downward. If his reaction is 0.2 ...
September 26, 2010

physics 2
A charged line extends from y = 2.50 cm to y = -2.50 cm. The total charge distributed uniformly along the line is -9.00 nC. At what distance x does the result for the infinite line of charge differ by 1.0% from that for the finite line?
September 19, 2010

physics 2
A charged line extends from y = 2.50 cm to y = -2.50 cm. The total charge distributed uniformly along the line is -9.00 nC. Find the magnitude of the electric field on the x-axis at x = 0.25 cm.
September 19, 2010

Science (Nutrition)
Which hormone signals the pancreas to secrete bicarbonate into the small intestine? Which hormone tells the pancreas to secrete pancreatic lipases, proteases, and amylases into the small intestine?
September 13, 2010

International Business
Why does Logitech manufacture in China and Taiwan, undertake basic R&D in California and Switzerland, design products in Ireland and coordinate marketing and operations from California?
August 17, 2010

Business
How does the failed Nordstrom marketing strategy in the 1990s demonstrate the importance of branding?
August 14, 2010

Chemistry
PRECIPITATION BY NaC2H3O2(aq) (a) Add 2 mL of sodium acetate solution to the test tube. (b) If a white precipitate forms at the bottom of the test tube, decant the remaining liquid into another clean test tube and retain the precipitate. (Decanting is the same as pouring, but ...
August 12, 2010

Chemistry
silver ions in a solution of silver salts can be recovered by immersing copper metal in the solution. crystals of pure silver are deposited on the silver metal. design an experiment to determine the number of moles of silver atoms that form describe the procedure materials and...
August 11, 2010

Chemistry
silver ions in a solution of silver salts can be recovered by immersing copper metal in the solution. crystals of pure silver are deposited on the silver metal. design an experiment to determine the number of moles of silver atoms that form describe the procedure materials and...
August 11, 2010

biology
Describe the role of microorganisms (bacteria or viruses) in: a. Genetic manipulation and medical research b. Ecosystem (such as bacteria used as decomposers. Oil spill clean up) c. Food industry (microbes which are used to make yogurt)
August 11, 2010

biology
How does antibiotic resistance appear to develop within a bacterial populations? What are the health implications for human populations that increase the use of antibacterial soaps
August 11, 2010

Chemistry
1. Write a balanced equation for the neutralization equation.
August 11, 2010

CJA/363
Ms. Sue, thank you for the help on this paper. I was having a difficult time trying to figure out where to start. Sometimes it takes someone else to point it out for you.
July 19, 2010

Managerial Accounting Practices
Your general manager called you into his office to discuss an ongoing problem. He explains that in the past, whenever he wanted to know how the projected income statement might change if sales volume changes, it would take weeks to have the accounting department redo the ...
July 18, 2010

HHS 225
I am supposed to write a vulnerability report for an urban medical clinic serving low-income clientele. The clinic is located in a hot, dry desert region of Southern California, in high-traffic, high-crime area; Where do i begin??????
July 17, 2010

PSYCHOLOGY
1. One of the reasons that certain advertisements are successful is because viewers want to behave like those they observe. What is the general term that psychologists use to describe this type of behavior
July 17, 2010

xacc 280
I just need an example • What increases the Asset account, a debit or a credit? • What decreases the Asset account, a debit or a credit? • What is the normal balance of the Asset account, a debit or a credit? Account Changes Account Categories What increases the...
July 10, 2010

college
I also need help writing five sentences with proper verb tense
June 18, 2010

College
I need help with the Discussion Questions for "State Automobile License Renewals" Case Studies - Chapter 9 of Principles of Operations management (Page 376).
June 9, 2010

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