Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 1,218

**Chemistry**

The approximate pH of a 3.0 x 10-3 M solution of the strong acid H2SO4 is a) 3.5 b) 3.0 c) 2.5
d) 2.2
e) -3.0 i got C by -log(3.0e-3) is this correct?

**English:Language Arts 1**

1999,I went to Disney World for vacation

**physics**

A ball with a horizontal speed of 1.25 {\rm m/s} rolls off a bench 1.00 {\rm m} above the floor. How long will it take the ball to hit the floor? How far from a point on the floor directly below the edge of the bench will the ball land?

**astronomy**

Suppose Mercury's rotation period were three-quarters of its orbital period. How many Mercury days would ther be in a Mercury year?

**statistics**

if the average number of textbooks in professors' offices is 16, the standard deviation is 5, and the average age of the professors is 43,with a standard deviation of 8 ,which data set is more variable ?

**chem**

If one started will 7.72g of copper (11) chloride, how many gram of copper could be produced ?

**chem1151 please help me**

275.1282

**chem1151 please help me**

If one started will 4.33g of copper(11) chloride , how may grams of copper could be produced?

**chem1151**

I don't understand it.Please help me!

**chem1151**

If 2.68 grams of Copper was recovered and you started with 8.94 grams of Copper(II)chloride,then what is the percent yield of the reaction?

**Singapore Math**

An animal shelter has 1008 cats, dogs and rabbits. The ratio of the number of dogs to the number of cats in the animal shelter is 3:7. The ratio of the number of rabbits to the number of dogs is 2:5. How many rabbits are there in the shelter?

**astronomy**

What is theratio of the luminosity per aquare meter coming from a part of the Sun that is 5800 K versus a sunspot where the temperature is 5000 K?

**astronomy**

How fast must a spaceship travel to reachthe center of the Galaxy (26,000 ly away) in 100 years "ship time"?

**Excel Graphs**

i'm having trouble getting my graph to come out right in the legend its posting everythin and only need 2 mts to show up how can i fix it

**astronomy**

How fast must a spacecraft travel to reach the center of our Galaxy (26,000 ly away) in 100 tears "ship time"?

**Astronomy**

thank you

**Astronomy**

What is the Lorentz factor for a spaceship traveling at 0.5c?

**Astronomy**

Thank you

**Astronomy**

The frequency of a radio transmitter is 90 megahertz. What is its wavelength?

**Chemistry**

so would the answer be B?

**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

**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 1...

**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 1...

**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?

**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?

**Science**

What is a process that could cause an unconformity?

**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.

**College mathematics 1**

The end of a 30 inch pendulum describes an arc of 6 inches through what angle does the pendulum swing?

**business finance**

answers to exam#06044200 do you have ?

**Chemistry**

I got it DrBob222 thank you anyway!

**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.

**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.

**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?

**physics**

How does your mass on Earth compare to your mass on Mars?

**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?

**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

**math**

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

**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?

**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?

**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

**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

**Math**

Illistrate that (x^1/2)(x^3/2) = x^2, using x=9

**Math**

Z^3/3?

**Math**

Divide. z4/5 divide by z1/2

**Math**

I mean x^2/3 / x^1/3

**Math**

Divide. x2/3 divided by x1/3

**Math**

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

**Math**

Multiply. (a^2b^2)(a1/3b1/4)

**math**

Yes, 5/3 (fraction) after the y is an exponent.

**math**

Multiply. (x^5y5/3)^2

**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

**math**

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

**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?

**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 neede...

**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 h...

**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?

**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?

**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?

**college mathematics1**

solve the system x+6y=24, -6x+5y= -21

**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.

**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

**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 d...

**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?

**algebra**

90+30(2)-4.9(2)^2=

**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 j...

**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

**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:(:(:(

**asu**

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

**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?

**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...

**algebra**

I truthfully do not know this is a tricky one

**Math**

It is an easy answer you just have to use the order of operations

**economics**

I need help to put in Excel Sherwin -Williams exercise

**algebra**

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

**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)

**algebra**

what is the least prime number between 80 & 90?

**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...

**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 ...

**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 ...

**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

**Math**

x^3+2x^2-x=2 Find the real number of solutions of the equation

**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...

**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...

**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 si...

**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...

**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...

**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 ...

**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!

**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 t...

**geometry**

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

**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

**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!

**Math- Trig please help!**

thank you!

**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?

**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?

**World Geography**

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

**World Geography**

What biomes have the highest population density?

**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?

**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?

**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 12.37...

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