Friday

August 28, 2015
Total # Posts: 840

**Chemistry**

A compound is found to contain 50.05 % sulfur and 49.95 % oxygen by mass. What is the simplest (empirical) formula for this compound? They said to assume that it is 100 grams. I found the molar mass. S- 32.06 0-16.00 But now I don't know what to do. Please help. Thank you!
*August 27, 2015*

**math**

2/5-2/15+3/10
*August 26, 2015*

**Chemistry**

What is a good website to practice limiting reagent problems?
*August 25, 2015*

**Math **

what is a good website to practice limits?
*August 25, 2015*

**Math**

How do I know if a graph has removable continuity, jump, or infinite? What is the difference?
*August 19, 2015*

**Science**

The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound? Molar mass of CO2= 44.01 Molar mass of H20= 18.01 2.58g/44.01=0.586 mol CO2 .53g/18.01=.0294 mol H2O I Don't know where I went ...
*August 19, 2015*

**math**

A room is 12 feet long and 10.5 feet wide. A scale model of the room is 3.5 feet wide. What is the area of the scale model? 10.3 square feet 14 square feet 36 square feet 122.5 square feet
*July 20, 2015*

**Geometry **

If mADC = 7x+3 and mDCB = 5x+9, then mDAB = ?
*May 14, 2015*

**SOLVE -MATH**

A physics exam consists of 9 multiple choice questions and 6 open-ended problems in which all work must be shown.If an examinee must answer 6 of the multiple- choice questions and 3 of the open-ended problems, in how many ways can the questions and problems be chosen?
*April 30, 2015*

**Algebra 2/Statistics**

From a squad of 12 cheerleaders, 10 will assemble themselves into a 4-level pyramid at the Homecoming rally. 1.) How many different combinations of cheerleaders can be used to build the pyramid? For this I got 12C10=66......Right or Wrong? 2.) The coach decides that Alexis ...
*April 30, 2015*

**Algebra 2/statistics**

On a fair 6-sided die, each number has an equal probability p of being rolled. when a fair die is rolled n times, the most likely outcome (the mean) is that each number will be rolled NP times, with a standard deviation of sqrt NP(1-P). Brandon rolls a die 200 times. He will ...
*April 30, 2015*

**maths**

One number is greater than another by 4, their sum is 32. What are the two numbers? Write a function which could solve this for any two numbers (x and y) with any difference between them.
*April 20, 2015*

**Science**

Actually that's perfect. Haha Thank You Rykr :D
*April 2, 2015*

**Science**

What is the effect of the slope of an incline of a surface on an object’s speed?” PLEASE do not answer...I just need help understanding it. Thank You
*April 2, 2015*

**Math**

How do you find the surface area of a triangular prism?
*March 24, 2015*

**excel**

what formula would be used to calculate the calories from fat for food items which is equal to the grams of fat multiplied by 9
*March 19, 2015*

**Math**

The opposite sides of a square, a rectangle, a parallelogram, and a rhombus are what type of triangle?
*March 17, 2015*

**biology**

Hello, I am having trouble with a question on my homework. Even after reading through my notes and textbook I am still not sure what the answer is. I think the answer is the new paramecium is able to reproduce sexually and asexually.Here is the question: After sexual ...
*March 15, 2015*

**calculus**

If 3x^2 + y^2 = 7 then evaluate the second derivative of y with respect to x when x = 1 and y = 2. Round your answer to 2 decimal places.
*March 10, 2015*

**Accounting**

On December 31, 2013, Ruby Inc. issued 3,000 $1,000 par value bonds with a stated rate of 6% and a 10-year maturity. Interest is payable semiannually on June 30 and December 31.
*March 8, 2015*

**Calculus 2**

Let a thing rod of length a have a density distribution function p(x)+10e^(-.1x), where x is measured in cm and p in grams per centimeter. A) if the mass of the rod is 30 g, what is the value of a? B) For the 30g rod, will the center of mass lie at its midpoint, to the left, ...
*February 23, 2015*

**Physics**

A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m/s2. 1) What acceleration would the force give to an object with a mass of (m2-m1)? 2) A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m...
*February 21, 2015*

**Physics**

A 5.0- kg concrete block rests on a level table. A 3.7- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.0 m/s2, what is the coefficient of friction between the block and the table?
*February 21, 2015*

**Physics**

Two boxes, A and B, are connected to each end of a light vertical rope. A constant upward force 90.0N is applied to box A. Starting from rest, box B descends 11.0m in 3.50s . The tension in the rope connecting the two boxes is 30.0N a) What is the mass of box A? b) What is the...
*February 17, 2015*

**AP European History**

How did medieval Europe lay the groundwork for the rebirth of Europe (Renaissance)? What conditions existed that allowed Europe to evolve out of medieval conditions?
*February 11, 2015*

**Physics**

Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 68.5 N, Jill pulls with 61.3 N in the northeast direction, and Jane pulls to the southeast with 111 N. (Since the donkey is involved with such uncoordinated people, who can blame it for ...
*January 31, 2015*

**Math**

Leena bakes a loaf of bread. She eats 1/8 loaf of bread and give 1/6 of it each of her 3 friends. What fraction of the loaf of bread is left?
*January 27, 2015*

**health**

It's considered to be an advantage to have lungs with increased capacity, because with increased capacity A. anaerobic exercise is easier. B. the lungs can better exchange oxygen and waste products in the blood. C. the chest looks more "buff." D. the lungs will ...
*December 28, 2014*

**english**

During the long afternoon, Daryl searched for his car keys. He searched under the bed, beneath the sofa cushions, and emptied his jacket pockets. soryy..
*December 14, 2014*

**english**

Which one of the following words is not an object of a preposition? A. afternoon B. cushions C. pockets D. bed c?
*December 14, 2014*

**english**

Which one of the following words represents an object of a preposition? A. afternoon B. Daryl C. sofa D. trouser b?
*December 14, 2014*

**English**

(1) Brenda would have liked to have taken her vacation at the beach. (2) However, the weather forecast on the television called for rain. (3) Also, her fiancé, Max, wanted to vacation in the mountains. (4) After a heated discussion, Brenda and Max decided to compromise...
*December 14, 2014*

**English**

Thanks :P
*December 14, 2014*

**English**

In which one of these sentences does an adverb modify a verb? A. Lucy quickly hid behind the tree. B. The dress was terribly old. C. Jacob was a very smart boy. D. Mr. Dodge moved in an extremely slow manner. I think it's A?
*December 14, 2014*

**History**

Two methods used to control annual floods were ______________
*December 11, 2014*

**math**

12 3/4 feet long by 11 1/2 feet wide is how many square feet
*December 8, 2014*

**math h**

Darcy, Jason and Maria share $268. Jason has $20 more than Darcy and Maria has twice as much money as Jason. How much money do Darcy and Jason have altogether?
*November 19, 2014*

**math **

Gerry had a total of 30 pens and pencils. He decided to trade with his friends all of his pens and pencils. If he traded every pen for 2 pencils, he would have 48 pencils in all. How many pens and how many pencils did he have before the trade?
*November 19, 2014*

**math **

Juan and rachel have the same number of marbles. Rachel gives away 10 marbles and Juan gives away 22 marbles. Rachel then has 3 times as many marbles as Juan. How many marbles did each of them have at first
*November 19, 2014*

**math **

Add the hundredths. 4 hundredths + 7 hundredths = ____ hundredths. Regroup the hundredths.
*November 17, 2014*

**Chemistry**

What is the minimum amount of 6.0M H2SO4 necessary to produce 19.0g of H2(g) according to the reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)
*November 14, 2014*

**math **

Mr. Sims has 198 oranges. he packs them into 5 crates. Use rounding to estimate the number of oranges in each crate.
*November 12, 2014*

**math**

A basket with 12 apples has a mass of 3105 grams. The same basket with 7 apples has a mass of 1980 grams. Each apple has the same mass. What is the mass of the basket?
*November 12, 2014*

**math**

Sally and Marta had the same number of postcards. After Sally sold 18 of her postcards, Marta had 4 times as many postcards as Sally. How many postcards did each girl have to begin with?
*November 12, 2014*

**Chemistry**

2 moles of ideal gas at 300K, initial volume 25 L, are compressed under an external pressure at 3600 torr. Assuming the temp and the internal energy of gas do not change, what is the entropy change of the gas? (Assume the heat flow is reversible)
*November 4, 2014*

**java programming**

Create a java program that will calculate the current grade in a classroom. The program should ask for 5 grades as well as total point value per grade available.
*November 3, 2014*

**computer science**

I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double, or ...
*October 28, 2014*

**Java**

I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double, or ...
*October 28, 2014*

**math**

A sticker is 1.2 cm wide how many stickers will fit edge to edge on a strip of paper that is 108 Centimeters long
*October 28, 2014*

**Physics**

A 2.32 kg block slide down a ramp from a height of 4.19 m. The block has a speed of 3.25 m/s when it reaches the bottom. There is friction. What is the work (in J) done by gravity? What is the work done by friction? I found the work of friction already. KE= .5m(v^2) KE= .5(2....
*October 27, 2014*

**Java**

NEED HELP! I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double...
*October 26, 2014*

**JAVA PROGRAMMING**

NEED HELP! I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double...
*October 25, 2014*

**physics**

In a game of shuffleboard, a disk with an initial speed travels of 3.2m/s travels 6.0m (a) what is the acceleration of the disk? (b) what is the coefficient of friction between the floor and the disk? So far I've gotten to the equation vf^2 - vi^2 = 2a(xf-xi) because time ...
*October 19, 2014*

**Algebra**

Algrbra evaluate each expression when n = 75 12n 36n 28n 56n 87n is that mutiplication?
*October 8, 2014*

**algb**

We must be taking the same class but different levels. I do not know a Devian or Amber.
*October 1, 2014*

**math**

I do not know Devian or Amber?
*October 1, 2014*

**Math-G7 Help please**

Write a system of equations to match each of these problems. Then solve the equations using the method... Substitution, or linear combinations. _____________________________________ 1. Dan is 4 years older than his brother Gabriel. Together their ages equal 22. How old is ...
*October 1, 2014*

**Math! URGENT**

i calculate one solution through -2(x-1) = 2x-2 expand the brackets giving you 2x-2 -2(x) makes 2x then -1 x -2 = -2 add the equation together gives you 2x-2
*September 25, 2014*

**physics**

a trolley of mass 40kg us pushed up a hill of height 10m at an angle of 20 degree. calculate the force required to reach this height. how do i complete this question?
*September 25, 2014*

**Science**

1.590
*September 23, 2014*

**vocabulary **

the animals in the drought area traveled for many miles to reach a body of water where they could blank their thirst
*September 22, 2014*

**math**

Each of their six water bottles holds 8 gallons. How many gallons of water did they take?
*September 21, 2014*

**science**

Yes mam
*September 18, 2014*

**science**

Can there be 2 full moons?
*September 18, 2014*

**programming**

Could you give me an idea of how to do this? I'm lost
*September 12, 2014*

**programming**

create a program using java that calculates the current grade in a classroom. the program should ask for 5 grades as well as the total point value per grade available.
*September 12, 2014*

**JAVA PROGRAMMING **

Create a java program that will calculate the current grade in a classroom. The program should ask for 5 grades as well as total point value per grade available.
*September 12, 2014*

**AP English 11**

Can "as if" be used in a simile similarly to the singular "as" or "like"? Would this example be considered a simile comparing children's eligibility to have recess compared to a carrot impending over head: "As if physical activity were a ...
*August 31, 2014*

**AP English 11**

I have researched each term repeatedly and have a simple understanding of the meaning of each term, however, I am still not comfortable with my answers. Are the following sentences either paradox, parallelism, oxymoron, or juxtaposition. 1. "She liked to be with people, ...
*August 31, 2014*

**English 11 AP**

I have researched each term repeatedly and have a simple understanding of the meaning of each term, however, I am still not comfortable with my answers. Are the following sentences either paradox, parallelism, oxymoron, or juxtaposition. 1. "She liked to be with people, ...
*August 31, 2014*

**English 11 AP**

Are you indicating that the following sentence is a simile? The comparison would be children's eligibility to have recess to a carrot dangling over someone who is attempting to grasp it.
*August 31, 2014*

**English 11 AP**

Can "as if" be used in a simile similarly to the singular "as" or "like"? For example: "As if physical activity were a carrot to dangle as a reward or yank away as a punishment."
*August 31, 2014*

**English**

I believe that the following is an example of parallelism, am I correct? "They made friends. They ran free."
*August 31, 2014*

**English**

1. juxtaposition 2. Juxtaposition 3. Oxymoron 4. Oxymoron
*August 31, 2014*

**English**

I have researched each term repeatedly and have a simple understanding of the meaning of each term, however, I am still not comfortable with my answers. Are the following sentences either paradox, parallelism, oxymoron, or juxtaposition. 1. "She liked to be with people, ...
*August 31, 2014*

**English**

Yes I have checked the definitions from multiple sites but I am still weary about what terms go with what sentences
*August 31, 2014*

**English**

Are the following sentences either paradox, parallelism, oxymoron, or juxtaposition. 1. "She liked to be with people, but her lifestyle tore her away from them." 2. “Today was the day that Whitman students both dreaded and anticipated with glee.” 3. "...
*August 31, 2014*

**Chem 2**

4) Calculate the solubility of calcium hydroxide, Ca(OH)2 (Ksp = 5.5 x 10-5) in grams per liter in: a. Pure water b. 0.10 M CaCl2
*July 29, 2014*

**math**

The cubed root of 27 is 3. So be will equal 3.
*July 29, 2014*

**general math 1**

1. Find the product of 487.9573 and 1,000.
*July 28, 2014*

**general math**

2. Solve this equation: 5x − 2 = 2x + 7
*July 28, 2014*

**social studies**

how does the appeal system work?
*July 4, 2014*

**science**

Do houseplants affect the quality of air in a house? Describe an experiment that would answer this question. What gases do you want to measure? I answered yes since plants give off oxygen which animals need to survive. I need a little help with the experiment.
*July 4, 2014*

**physics**

A referee tosses a coin straight up with a velocity of 5.25 m/s, how high does it go above its point of release? (Hint: How fast is it moving at the maximum height?)
*June 28, 2014*

**Math**

Thanks for the quick reply :D
*June 1, 2014*

**Math**

Hi could you please solve this as quick as possible, thanks. A tree 34 m high cast a shadow 12 m long. The angle of the inclination of the sun is closest to: A 70 B 21 C 69 D 19 E 79 Thanks
*June 1, 2014*

**please!!! i really need help!!! - English**

in "the king is dead, long live the king" by Mary E. Coleridge, what are some character traits of the king?
*May 27, 2014*

**English**

in "the king is dead, long live the king" by Mary E. Coleridge, what are some character traits of the king?
*May 27, 2014*

**Geometry Help!!!**

. Katrina lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Katrina’s home and the football field at the exact point where an altitude to the right triangle formed by her home, the park, and the ...
*May 22, 2014*

**Geometry**

17. The equation (x + 6)2 + (y + 4)2 = 36 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals. (3 points
*May 22, 2014*

**chemistry **

Two solutions were prepared. The first was a 0.672 M solution of aluminum hydroxide and the second was a 0.405 M sulfuric acid solution. 1.) If a total of 500 mL of aluminum hydroxide solution was prepared, how many grams of the solute (AL(OH)3) would have been weighed out in ...
*May 7, 2014*

**Math**

A regular hexagon with a perimeter of 24 meters is dilated by a scale factor of 5 2 to create a new hexagon. What is the perimeter of the new hexagon?
*April 23, 2014*

**chemistry**

How much energy is needed to melt 25.4 grams od I2?
*April 21, 2014*

**math**

Bacteria is growing in a petri dish. Initially, there were 15,000 bacteria in the dish. It triples every 8 hours. Write the equation to represents this growth after t hours.
*April 10, 2014*

**Chemistry**

If the CO2 is not removed by boiling after the addition of HCL, how will this affect the amount of NaoH required to reach the bromophenol endpoint. Explain.
*April 9, 2014*

**science**

Calculate the mass percent composition of each element in each compound.
*March 10, 2014*

**Science**

What is the formula to find density when weight is 90N, Vol is 45ml, Mass is 9.0g
*March 10, 2014*

**Math**

What percent (as a mixed number fractions) corresponds to 2/3?
*March 6, 2014*

**Math**

Chad buys peanuts in 2 pound bags he repackages them into bags that hold 5/6 pounds of peanuts how many 2 pound bags of peanuts Should Chad by so that he can fill the 5/6 pound bags without having any peanuts leftover
*February 3, 2014*

**physics**

A 1.70 kg ball is attached to a ceiling by a 1.50 m long string. The height of the room is 3.36 m. The acceleration of gravity is 9.81 m/s2 . What is the gravitational potential energy associated with the ball relative to a) the ceiling? Answer in units of J b) the floor? ...
*January 22, 2014*