Posts by mark
Total # Posts: 1,757

Chem
Balance the chemical equation given below, and determine the number of grams of MgO needed to produce 15.0 g of Fe2O3. _MgO(s)+_Fe(s)>_Fe2O3(s)+_Mg(s) 1. a. 11.4 g 2. b. 3.78 g 3. c. 1.26 g 4. d. 0.0877 g I got equation balanced 3,2,1,3 just having trouble on how to find ... 
Chem
Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) products. If the rate law is: Rate = k[E]2[F]1, what is the overall order of reaction? 1. a. zero 2. b. first 3. c. second 4. d. third 
Chemistry
Which element can form more than one kind of monatomic ion? 1. a. Se 2. b. Sn 3. c. S 4. d. Sr 
math
justify that15 is the sum of eachrow of a 3X3 magic square using the number 09. Find the sume of all the numbers. What is the of eachrow in a 4X4 magic square that uses the numbers 116. 
computer science
c++ program question write a program that uses a loop to display the characters for each ascii code 32 through 127. display 16 characters on each line with one space between characters in c++ 
Chemistry
Delta H = 2800 Kj Delta S = 260 J Delta Grxn = 2800(15+273)(260/1000) = 2874.88 NonSpontaneous 
Langusge Arts
The 
statistics please help!
A total of 8,000 dollars is invested at anunual interest rate of 1%. Find the balance after 1.5 years, if the interest is compounded annually. using A=p(1+r/n)^nt 
Chem
Delta H = 2800 Kj Delta S = 260 J Delta Grxn = 2800(15+273)(260/1000) = 2874.88 NonSpontaneous 
science
ms.sue would it be compressional i am not really sure could you please tell me if i am right thank you 
science
A wave that causes the particles of the medium to vibrate parallel to the direction the wave travels 
Physical Chemistry
The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 192 kJ·mol1 to 72 kJ·mol1. (a) By what factor does the rate of the reaction increase at 281 K, all other factors being equal? (b) By what... 
Math
Find (if possible) the trigonometric function of the quadrant angle. sec 3pi/2 My answer was 0. Am I correct? 
Math(Please help)
What is the domain? Use a graphing utility to determine the intervals in which the function is increasing and decreasing and approximate any relative maximum or minimun values of the function. g(x) = 12 Ln x / x My answer was: Domain = (12,0) decreasing = (3,2) and ... 
NEED HELP! CHEMISTRY
Three electrolytic cells containing solutions of CuNO3, Sn(NO3)2, and Fe(NO3)3, respectively, are connected in series. A current of 2.2 A is passed through the cells until 3.10 g of copper has been deposited in the cell. (a) What masses of tin and iron are deposited? found ... 
Math
What is the domain? Use a graphing utility to determine the intervals in which the function is increasing and decreasing and approximate any relative maximum or minimun values of the function. g(x) = 12 Ln x / x My answer was: Domain = (12,0) decreasing = (3,2) and increasing... 
Physical Chemistry
Three electrolytic cells containing solutions of CuNO3, Sn(NO3)2, and Fe(NO3)3, respectively, are connected in series. A current of 2.2 A is passed through the cells until 3.10 g of copper has been deposited in the cell. (a) What masses of tin and iron are deposited? tin g ... 
Physical Chemistry
i thought you were saying to divide by the 1 equivalent? 
Physical Chemistry
so for the 1 equivalent weight of Ag i just divide molar mass 107.87 by 1.009 and get 106.8?? is the 1 equivalent weight in material in grams? 
Physical Chemistry
A total charge of 97.4 kC passes through an electrolytic cell. Determine the quantity of substance produced in each of the following cases. (a) the mass (in grams) of silver metal from a silver nitrate solution ?g (b) the volume (in liters at 273 K and 1.00 atm) of chlorine ... 
Math(Help!!)
What is the domain? Use a graphing utility to determine the intervals in which the function is increasing and decreasing and approximate any relative maximum or minimun values of the function. g(x) = 12 Ln x / x My answer was: Domain = (12,0) decreasing = (3,2) and increasing... 
Math(Please help)
use the given information to solve the triangle. C= 85 degrees 20' a = 35 c = 50 I know that I have to find A,B,b but I do not know how to do this. 
Math
use the given information to solve the triangle. C= 85 degrees 20' a = 35 c = 50 I know that I have to find A,B,b but I do not know how to do this. 
physics
A steam turbine operates between hot and cold reservoir temperatures of 538 degrees celcius and 92.1 degrees celcius respectively. If heat is supplied at a rate of 238 MW, what maximum amount of power could the turbine deliver? 
Math
thanks! 
Chemisty/Bio
Is a environment that is hypoxic or anoxic the same as acidic?? I am a little confused how the two relate to each other? 
physics
A pigeon in flight experiences a force of air resistance given approximately by F=bv2, where V is the flight speed and B is a constant. A) In terms of SI units, what are the units for the constant "b"? B) What is the largest possible speed of the pigeon if its ... 
Math(Correction)
Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan Q = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees  Q) ... 
Math(Correction)
Error 
Math(Correction)
Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees  Q) d... 
Math(Correction)
Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. Sorry for the mistake. They are two separate functions and i need... 
Math
Use the given function values and trigonometric identities (including the relationship between a trigonometric function and its cofunction of a complementary angle) to find the indicated trigonometric functions. sec Q = 5 tan = 2sqrt6 a) cos Q b) cotQ c) cot(90 degrees  Q) d... 
grant preposals
Distinguish between a projectwide evaluation plan and an objectiveoriented evaluation plan. 
PreCal(Please help)
Error 
PreCal (Please help)
Identify any asymptotes of the graph. y = 1.08^5x I know that there is a horizontal asymptote but I do not know how to find it. 
PreCal
Identify any asymptotes of the graph. y = 1.08^5x I know that there is a horizontal asymptote but I do not know how to find it. 
PreCal
Identify the following features of the graph of g(x) = (3/2)^x+2 A) Asymptotes B) Intercepts C) Increasing or decreasing Once I graph this on my calculator, how can I find these? 
PreCal
Identify the following features of the graph of g(x) = (3/2)^x+2 A) Asymptotes B) Intercepts C) Increasing or decreasing I really do not know how to find these 
PreCal
Identify any asymptotes of the graph. y = 1.08^5x 
PreCalculus
Identify the following features of the graph of g(x) = (3/2)^x+2 A) Asymptotes B) Intercepts C) Increasing or decreasing I really do not know how to find these 
PreCal
Find the inverse of the function f(x) = 3^x+2 
Math
When graphing two linear equations, what is the significance of the intersection of the two graphs, and if there is no intersection? 
Chemistry
So then because the valences are diff on each side that means its a redox reaction?? And so N gained eletrons does that mean it's the NO3 ^1 that is the oxidizing agent or the N in NH3?? this stuff is tripping me up.....can ou explain it any more for me? sorry...im a ... 
Chemistry
I'm having a hard time with Redox and how to figure out which is redox Select all of the reactions that are redox reactions. I) Ca + 2H2O Ca(OH)2 + H2 II) CaO + H2O Ca(OH)2 III) Ca(OH)2 + H3PO4 Ca3(PO4)2 + H2O IV) Cl2 + 2 KBr Br2 + 2 ... 
Chemistry
I think these I know how to do ....just want someone to check..still sorta mixed up on the first question. Thanx For the following reaction, what is the correctly balanced reduction halfreaction? Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + OH(aq) A. e + Fe(OH)3(s) → ... 
Chemistry
I'm having a hard time with Redox and how to figure out which is redox Select all of the reactions that are redox reactions. I) Ca + 2H2O Ca(OH)2 + H2 II) CaO + H2O Ca(OH)2 III) Ca(OH)2 + H3PO4 Ca3(PO4)2 + H2O IV) Cl2 + 2 KBr Br2 + 2 KCl... 
Calculus
z=2 square root of 2 
English
He hurt his fist trying to open the window. 
Math
Find the coordinates of the turning point and determine wether it is minimum or maximum. y=xlnx2x The answer in the book says the coordinates are (e,e), the closest I have come is (1/lnx,1/lnx) which works if 1/lnx=e, but I don't think that it does. This question is in... 
Chemistry
How do I know which of these .1M solutions will have a pH less than 7? KF, NH4I, NaH2PO4, Fe(NO3)3 I am guessing all but KF is acidic...but if someone could confirm this and explain why that would be helpful 
P. Chemistry
If given the Ka or Kb and pKa and pKb, how do you find the initial concentration of a weak acid/base in a solution given the pH? Is there an equation for this? I can't find anything in my notes and am not sure what to look for. 
P. Chemistry
A student added solid K2O to a 750.0 mL volumetric flask. The solid was dissolved in water and then the flask filled with water to the mark. This formed 750.0 mL of the initial KOH solution. 20.0 mL of the initial solution was transferred to another flask and diluted to 200.0 ... 
Accounting
2. b 
physisc! URGEENT
The current is 1.9 m/s. A person can swim 0.7 m/s. What is the best angle for the swimmer so that it is swept downstream the shortest distance possible? 
Mega Stat
How do you know the pvalue on megastat. On minitab It looks like it gets a different pvalue than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000. 
statistics
How do you know the pvalue on megastat. On minitab It looks like it gets a different pvalue than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000. 
science
describe a pond and indicate the types of interdependence of living things in it 
science
describe a pond and indicate the types of interdependence of living things in it 
Chem
When 0.10 g of insulin is dissolved in 0.200 L of water, the osmotic pressure is 2.30 Torr at 20°C. What is the molar mass of insulin? I tried using the van't hoff equation, converting Torr into atm; but not sure how to do it. my teacher didn't really explain this ... 
statistics
Number sampled is 1,000 and mean is 7.2 on a scale from 110 how do I determine standard deviation. Can we answer this with using the sampling distribution of the sample proportion? 
statistics
If sample number is 1,000 and mean is 7.2 on a scale from 110 how do I determine standard deviation. 
MA 005
The width of a rectangle is 3ft. less than the length. The perimeter is 62ft. Find the length and the width od the rectangle. 
criminal justice
During the middle Ages, defendants could avoid serving a harsh penalty if they were granted 
business
Explain the difference between fiscal policy and monetary policy. Discuss how each of these approaches can be used to influence the state of the economy. 
algebra
Joe's larger tank is completely filled with water. He takes water from it to completely fill the small tank. Determine how many cubic inches of water will remain in the larger tank The larger tank is 12 x 30 x 16 and the smaller tank is 6 x 12 x 9. 
Math
The average of a set of five different positive integers is 360. The two smallest integers in the set are 99 and 102. What is the largest possible integer in this set? 
math
(5)(3/5)(x+2)=(5)(x4) 3(x+2)=(5)(x4) 3x+6=5x20 3x+6+20=5x20+20 3x+26=5x 3x3x+26=5x3x 26=2x x=13 
Physics
A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.10 seconds later. 
Physics
A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.10 later. What was the rocket's acceleration? 
math
find all possible values of x such that, when the five numbers x, 14, 11, 6, 17 are arranged in order, the mean is equal to the median 
math
find all possible values of x such that, when the five numbers x, 14, 11, 6, 17 are arranged in order, the mean is equal to the median 
maths
24 
fallacy
It takes someone with a really big heart to give to our charity , and you seem like someone who cares more than most . ... 
business
Thank you Ms.Sue, for the resource. 
business
I need help with this question whats the social and cultural customs that Walt Disney could encounter overseas? 
business and tech
What are some advantage of globalization? 
MATH
What percent of 49 is 7 
MATH
25 is what percent of 365? What percent of 128 is 24 
Math
What percent of 185 is 35? 
algebra
solve each system using elimination x+4y=12 and 2x3y=6 
Math
Could someone Please tell me how to go about doing these two problems. Thank You. 
Math
Multiple Choice: Mary Jane gets a student rate of $27.50 a month for health insurance. There is a $200.00 deductible, but no coinsurance payment. She recently received treatment for a covered condition. The bill was $2,350.00 Mary's insurance company provided payment of 80... 
chemistry
F is not he right answer 
business and tech
lets say that price gauging didn't happen,and the merchants sell the goods at the market price but with laws of supply and demand how would that be a good thing, When disasters hit an area, the cost of everything seems to go up immediately? 
business and tech
lets say that price gauging didn't happen,and the merchants sell the goods at the market price but with laws of supply and demand how would that be a good thing? 
business and tech
I need help on this question. "When disasters hit an area, the cost of everything seems to go up immediately: food, water, housing, gas and so forth. Explain why this phenomenon may be a good thing, using the laws of supply and demand". thank you very much 
Algebra 1
1.c 2.b 3.b 4.c 5.c 
SCIENCES
TEN EXAMPLES OF SUSPENSION AND SOLUTION MIXTURES. 
8th grade
The area of a rectangle is 45cm2. The height is one less than two times the base. what is the length of the base 
Algebra Word Problems
Children + adult = total receipts $1.00(x) +$3.00(350x) = $750 solve for x=>>>> number of children tickets, 350 "x" =>>>adult tickets 
calculus
Given x+xy+2y^2=6 find the coordinates of all other points on this curve with slope equal to 1/3. Please show work. 
english
To what extent is romeo a weak character 
algebra
5{[4(n4)+18][3(5n3)+5]}= simplify the answer 
Calculus
Two bacteria colonies are cultivated. The first colony has a doubling time of 2 hours and the second a doubling time of 3 hours. initially, the first colony contains 1,000 bacteria and the second colony 3,000 bacteria. At what time t will sizes of the colonies be equal? Is ... 
chemistry.
When 41.81 of a solution of aqueous sliver ions with a concentration of 0.2040 mol dm3 is added to a solution of XO3/4 ions, 1.172g of the precipitate is formed? ..Can any one help me with that! NB: 3/4 mean that 3 is up and 4 is under it. 
calc
a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use a graphical ... 
calc
a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use a graphical ... 
Math
How tall is a cylinder that has a volume o 2,123 cubic meters and a radius of 13 meters? 
Statistics
h t t p : / / t i n y u r l . c o m / y f z j y u o I'm not sure how to do #2. 
Math
Everyone in Mrs.Bowman's art class has 8 jars of paint except Jerome, who has 10. There are 74 jars of paint in the room. How many students are there in Mrs. Bowman's art class.