Saturday
February 28, 2015

Posts by Linda


Total # Posts: 1,297

Chemistry
For the system CaO(s) + CO2(g) = CaCO3(s), I added 1.00 mol of CaO(s) to 1.00L of 0.500M CO2(g) at 200C. At equilibrium the [CO2] = 0.150M. What is the value of Kp for this reaction? 

A. 0.172 B. 0.150 C. 5.82 D. 6.67 E. 2.59
February 29, 2012

Chemistry
Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction,

 NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g)

 A. 20.2 B. 2.06 X 10-4 C. 4.49 D. 4.84 X ...
February 29, 2012

Chemistry
Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction,

 NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g)

 A. 20.2 B. 2.06 X 10-4 C. 4.49 D. 4.84 X ...
February 29, 2012

math
Olivia bought some school supplies. In the first store she spent half the money she had plus $6. In the second store she spent one third of what was left plus $6.In the last store she spent ¼ of what was left and came home with $6.How much did she start out with?
February 27, 2012

money
Olivia bought some school supplies. In the first store she spent half the money she had plus $6. In the second store she spent one third of what was left plus $6.In the last store she spent ¼ of what was left and came home with $6.How much did she start out with?
February 27, 2012

Science
What is a process that could cause an unconformity?
February 26, 2012

Math
Create a graph from this research In a recent article, the author states that 71% of adults do not use sunscreen. Although 71% is a large percentage, explain why it could be misleading.
February 23, 2012

College mathematics 1
The end of a 30 inch pendulum describes an arc of 6 inches through what angle does the pendulum swing?
February 14, 2012

business finance
answers to exam#06044200 do you have ?
February 13, 2012

Chemistry
I got it DrBob222 thank you anyway!
February 8, 2012

Chemistry
This is not a question from the book, the appendic table is not needed, it is just an example of resources you may have.
February 8, 2012

Chemistry
Your laboratory supervisor directs you to prepare 500.0 mL of a buffer with a pH of 9.40. You have available all the weak acids and bases listed in your textbook's appendix and the salts of those weak acids and bases. Describe how you could make this buffer.
February 8, 2012

arithmetic
the sum of the 3rd and the 4th term is 44 and the sum of the 10th and the 15th term is 203. what is the sum up to the 20th term?
February 7, 2012

physics
How does your mass on Earth compare to your mass on Mars?
February 6, 2012

hinds
A boat moves 20.6 km across a lake in 34 min. What was the average speed of the boat in kilometers per hour?
February 5, 2012

math
Its a multible choice question and the choices are 20,40,60,80 and I still don't see how to come up with any of these answers
January 25, 2012

math
still confused! do they want to know how many items were checked by BOTH john and calvin, meaning the same item?
January 25, 2012

math
John checks every 8th item for color, and Colin checks every 12th item for durability. If 1,920 items passed by both of them, how many items were checked by both John and colin? How do I figure this?
January 25, 2012

math
don't know where to start on this one! a box contains 56 marbles. If the probability of randomly selecting a blue marble is 3/8, how many blue marbles are in the box?
January 24, 2012

math
How do I solve this? A mixture of nuts has a ratio of 5 parts peanuts to 3 parts cashews. How many ounces of cashews are in a 24 oz mixture? I am thinking 9 oz., but how do you write a problem to solve this
January 24, 2012

Algrebra
find the value of r so the line that passesthough each pair of points has the given slope(9,r),(6,3),m=-1/3
January 19, 2012

Math
Illistrate that (x^1/2)(x^3/2) = x^2, using x=9
January 18, 2012

Math
Z^3/3?
January 18, 2012

Math
Divide. z4/5 divide by z1/2
January 18, 2012

Math
I mean x^2/3 / x^1/3
January 18, 2012

Math
Divide. x2/3 divided by x1/3
January 18, 2012

Math
Sorry, they are exponents! Fractions confuse me, would it be 2/1 + 1/3 and 2/1 + 1/4?
January 18, 2012

Math
Multiply. (a^2b^2)(a1/3b1/4)
January 18, 2012

math
Yes, 5/3 (fraction) after the y is an exponent.
January 18, 2012

math
Multiply. (x^5y5/3)^2
January 18, 2012

Alg 2.. HELP?
Multiply or divide. 14. (x^5y5/3)2 16. (a^2b^2)(a1/3b1/4) 18. x2/3 divided by x1/3 20. z4/5 divide by z1/2
January 18, 2012

math
Howard has 102 feet of fencing. What is the area of the largest square dog pen he can build with the fencing?
January 18, 2012

Math
a carpeting store is having a special sale, offering carpeting at $16.50 per square yard. Its competitor is offering carpeting at $1.90 per square foot. Which store is less expensive? By how much?
January 18, 2012

English
Can someone please help me with this, let me know if the below looks correct? Improving Your Writing. Section 1 Facts and Figures that define the problem (the cause) Details that show the impact of the problem (effects) on Jack, Ruth, and the company. Section 2 The steps ...
January 18, 2012

math
Takheela plans to ship a dollhouse in a box that is 30 inches along each edge. The dollhouse measures 24 inches wide, 20 inches long, and 28 inches high. How much foam packing material (in cubic inches) will she need? What is the approximate side length of the cubic box that ...
January 18, 2012

math
A city planner has placed a square wading pool in the center of a park. The pool is surrpunded by a square fence, 20 meters wide. The tiles for the floor of the wading pool cover 121 sqaure meters. How wide is the wooden deck sprrounding the wading pool?
January 18, 2012

math
A room has 750 cubic feet of space. If the room is as high as it is long and wide, what is the approximate height of the rooms ceiling?
January 18, 2012

math
A room has 750 cubic feet of space. If the room is as high as it is long and wide, what is the approximate height of the rooms ceiling?
January 18, 2012

college mathematics1
solve the system x+6y=24, -6x+5y= -21
January 14, 2012

Math #2
Sue's average for 9 games of bowling is 108. What is the lowest score she can receive for the tenth game to have an average of 110.
January 9, 2012

Math
Need to know the number possible of outcomes.If you spin a spinner with sections A,B,C,D ,and E and two coins are tossed
January 9, 2012

physics
A closed auditorium of volume 27100 m^3 is filled with 2210 people at the beginning of a show, and the air in the space is at a temperature of 292 K and a pressure of 1.013·10^5 Pa. If there were no ventilation, by how much would the temperature (in K) of the air rise ...
January 7, 2012

physics
A water-cooled engine produces 1589 W of power. Water enters the engine block at 14.61 °C and exits at 29.91 °C. The rate of water flow is 147.3 L/h. What is the engine’s efficiency?
January 7, 2012

algebra
90+30(2)-4.9(2)^2=
January 6, 2012

math
Mindy, Daisy, Araceli and Leigh worked together on a job. The job paid $220. Each person was paid according to the amount of work they contributed to the job. Daisy and Araceli earned $280 together. Daisy and Mindy have $260, and Daisy and Leigh got $220. What percent of the ...
January 3, 2012

chemistry
Yes you`re good i made typo just to KMnos the right form is KMnO4 while CO3 is right please help if you know anything and thanks to much xxx
January 3, 2012

chemistry
14KMnos+4C3H5(OH)3----->7K2CO3+7Mn2O3+5CO3+16H2O I know this but hoe to do it please help me I have examination tomorow i i dont have idea how to do it:(:(:(
January 3, 2012

asu
calculus problem is u = 7i +9j + 2 k and v = -7i -9j - 2 k. and my ans is -135 how to double check
December 31, 2011

pre-algebra
find the product: (4k to the 5th power)(-2k)to the 3rd power. 5th power is inside the parenthesis and the 3rd is outside the parenthesis. Is it -32k to the 8th power or -32k to the 2nd power?
December 18, 2011

algebra
A flying saucer filled with space aliens landed in my front yard!After the entire crew had filled out of their spaceship, I happened to count their heads and feet. I saw a total of 91 heads and 124 feet. It was clear that their leader was a purple creature with three heads and...
December 12, 2011

algebra
I truthfully do not know this is a tricky one
December 12, 2011

Math
It is an easy answer you just have to use the order of operations
December 12, 2011

economics
I need help to put in Excel Sherwin -Williams exercise
December 11, 2011

algebra
How do you find the LCD for these fractions 3/4c & 5/6ct also is the LCD for 4/15 & 1/9 (45)?
December 11, 2011

algebra
the ordered pairs (2,3), (2,6) and (6,6) are coordinates of three of the vertices of a rectangle. What are the coordinates of the ordered pair that represents the fouth vertex? (3,6), (6,3), (3,2) or (3,3)
December 9, 2011

algebra
what is the least prime number between 80 & 90?
December 9, 2011

Algebra Word Problem...please help me
Megalodon Lives Angler went fishing and caught a monster of a fish! The head of the fish was 10 feet long. The length of the tail was equal to the length of the head plus half of the body. The body was as long as the head and the tail together. What was the total length of the...
December 7, 2011

Algebra Please help...
What a steal of a Deal! Hunter went to TV City to buy a new TV. When he got there, he found that the manager was offering a 25% discount on every TV in the store. The one Hunter wanted was last year's model so he got an additional 10% discount on his purchase. When he got ...
December 7, 2011

Algebra Please help...
What a steal of a Deal! Hunter went to TV City to buy a new TV. When he got there, he found that the manager was offering a 25% discount on every TV in the store. The one Hunter wanted was last year's model so he got an additional 10% discount on his purchase. When he got ...
December 7, 2011

Math
Find the real-number solution of the equation. 3x^7 = 81x^4 I got this far... 3x^7 - 81x^4 = 0 x^4 (3x^3 - 81) = 0
December 7, 2011

Math
x^3+2x^2-x=2 Find the real number of solutions of the equation
December 7, 2011

statistics
10. You have proposed a hypothesis that right-handed (RH) subjects will be superior in spatial analysis compared to left-handed (LH) subjects. Spatial analysis skills are being assessed on a scale which yields scores on a linear numerical scale. Given the following information...
December 6, 2011

Statistics
. You are running an a single variable ANOVA with five levels of the variable, such as comparing IQ on 5th, 6th, 7th, 8th and 9th graders and the F-value is very large. The significance for the F value is equal to .0003. What can you conclude about the overall effect and what...
December 6, 2011

Statstics
. You have proposed that males will outscore females on a standardized test of math skills. You now are looking at your results from an SPSS t-test which is analyzing for significance at the á = .05 level with a two-tailed test. You see the following output: t = 4.10 ...
December 6, 2011

Algebra word problem
A pack of Jellybeans contains 7 different flavors: Apricot, Banana, Coconut, Date, Eggplant, Fig, and Grape. You can Eat each flavor individually or come up with some crazy combinations. How many flavor combinations are possible with these 7 flavors alone or mixed? You can use...
December 6, 2011

Algebra word problem
Megalodon Lives Angler went fishing and caught a monster of a fish! The head of the fish was 10 feet long. The length of the tail was equal to the length of the head plus half of the body. The body was as long as the head and the tail together. What was the total length of the...
December 6, 2011

Agebra Word Problem
What a steal of a Deal! Hunter went to TV City to buy a new TV. When he got there, he found that the manager was offering a 25% discount on every TV in the store. The one Hunter wanted was last year's model so he got an additional 10% discount on his purchase. When he got ...
December 6, 2011

Math - Trig please help!
State two intervals in which the function y=7sin(1/5x)+2 has an average rate of change that is: a) zero b)a negative value c)a positive value Please explain how to get the intervals! Thanks a lot in advance!
December 5, 2011

Math -Trig Please help!
At one time, Maple Leaf Village (which no longer exists) had North America’s largest Ferris wheel. The Ferris wheel had a diameter of 56 m, and one revolution took 2.5 min to complete. Riders could see Niagara Falls if they were higher than 50 m above the ground. Sketch ...
December 1, 2011

geometry
(7x+3)in,(3x-1) +3 -3 6 4 7+6=12 4 12/12 = 4/6=2/3=1
December 1, 2011

stats
I'm a little confused on how to do it and then convert it into a percentage when I do work it out it comes to a huge number. I don't know to do anything after that . I get .31295738
November 29, 2011

math - please help!!
The number of immigrants living in a certan country with a large population makes up 20 percent of the population. in a random sample poll of 100 people what is the expected number of immigrants to be polled? (using bionomial distribution) thanks!
November 29, 2011

Math- Trig please help!
thank you!
November 29, 2011

Math- Trig please help!
A tire with a diameter of 100 cm rotates 20 times in 3 seconds. a) determine the angular velocity b) how far the tire has travelled? c) what is the speed in km/h?
November 29, 2011

algebra
When Mr. J. Raff took his two children to the zoo,their tickets cost $8.75. The next family in line was Mrs. Ella Fant with Grandpa and the five Fant kids. Their tickets cost a total of $19.75. How much does the zoo charge for each adult and for each child?
November 29, 2011

World Geography
Sorry, this wasn't clear at first. The question is what biomes of Negeria have high population density ?.
November 28, 2011

World Geography
What biomes have the highest population density?
November 28, 2011

American Government
Share two examples in American history of how the people of America shifted their ideologies from one set of beliefs to another. Why did this happen? What were the political, economic and social conditions that led to this shift?
November 28, 2011

Physics/Science
At what point in the swing of a pendulum is the maximum amount of the ball's motion transferred to the object it hits? (I think it's at its lowest swing point but I'm not completely sure.) And what does this "kinetic energy" depend on?
November 27, 2011

statistics
If a company is thinking of giving one department a 1000 bonus. Based on their means and standard deviation scores which set of employess will do better based on this information? Who should get the bonus? Employee A mean 16.875 standard deviation 4.45413 Employee B mean 12....
November 22, 2011

Algebra 2
Dividing: Write the expression as a complex number in standard form 1) 2+5i/5+2i 2) 6-i√2/6+i√2 for the first one I solved it and I only got this far: 10+21i-10i^2/25-4i^2
November 20, 2011

math - please help!!
If rhys is late for his finite mathematics class, and the probability that he is on time is 3/4. however if he is on time, he is liable to be less concerned about punctuality for the next class and his probability being on time drops to 1/2. rhy is on time monday. find the ...
November 20, 2011

Math
Find the discriminant of the quadratic equation and give the number and type of solutions of the equation. s^2√5 + s + √5 = 0 I'm confused because of the radical...
November 18, 2011

English/Writing
This is for an essay: How do you say/phrase "he used to", "he does not", "he is confronted with", "he would rather", "they have evolved", and "have succeeded" in present tense?
November 16, 2011

Art Apperciation
Compare Raphael’s School of Athens to Veronese’s Christ in the House of Levi. Explain how each artist reflected the political and social environment of Rome and Venice during the Renaissance period
November 16, 2011

algebra
Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 3x – 15y = -12 3x + 24y = -12
November 14, 2011

Algebra
Divide -4x^3 + 24x^2 – 24x + 4 by x^2 – 5x + 1
November 14, 2011

Chemistry
The value of delta H for the reaction of 2Na2O2(s) + 2H20(l)----> 4NaOH(s)+O2(g) is -126KJ When 2.0 moles of NaOH is formed?
November 13, 2011

math
What is 3(x +4) - 2(3x - 3) simplified a) -3x + 18 b) -3x + 12 c) -9x + 18 d) -9x + 12
November 13, 2011

math
how do you simplify 3(x + 4) - 2(3x - 3)
November 13, 2011

Math
Solve the equation by factoring, by finding square roots, or by completing the square. 4(x+8)^2=144 I'm not sure if I'm suppose to divide or multiply the 4 to both sides..
November 10, 2011

Algebra Please help
So how many many flavor combinations
November 9, 2011

Algebra Please help
A pack of Jellybeans contains 7 different flavors: Apricot, Banana, Coconut, Date, Eggplant, Fig, and Grape. You can Eat each flavor individually or come up with some crazy combinations. How many flavor combinations are possible with these 7 flavors alone or mixed? You can use...
November 9, 2011

Algebra word problem
A pack of Jellybeans contains 7 different flavors: Apricot, Banana, Coconut, Date, Eggplant, Fig, and Grape. You can Eat each flavor individually or come up with some crazy combinations. How many flavor combinations are possible with these 7 flavors alone or mixed? You can use...
November 8, 2011

Algebra word problem
Baking Cookies-Word Problem Our class planned a party for disadvantaged kids. Some of us baked cookies for the party. On the day of the party, we found we could divide the cookies into packets of two,three, four, five or six and have one cookie left over in each case. If we ...
November 8, 2011

algebra
Baking Cookies-Word Problem Our class planned a party for disadvantaged kids. Some of us baked cookies for the party. On the day of the party, we found we could divide the cookies into packets of two,three, four, five or six and have one cookie left over in each case. If we ...
November 8, 2011

Accounting
Present value analysis-cost of capital National Leasing is evaluating the cost of capital to use in its capital budgeting process. Over the recent past, the company has averaged a return on equity of 12% and a return on investment of 9%. The company can currently borrow short-...
November 3, 2011

Math
Lee Holmes deposited $15,000 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $40,000 at 9% intrest compounded semiannually. At the end of 6 years, what is the balance in Lee's account?
November 3, 2011

Math
Solve the equation 40^2 + 4a = 0 What I did was 4a (10a + 1) = 0 then I'm not sure what to do next...
November 3, 2011

Math
Factor the trinomial. If the trinomial cannot be found, say so. 11m^2 + 14m - 16 I just want to make sure...would the answer be (11m-8)(m+2) ?
November 3, 2011

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