Saturday

March 28, 2015

March 28, 2015

Total # Posts: 832

**Chemistry**

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 750 mL of a solution that has a concentration of Na^+ ions of 1.3 M? Express your answer numerically in grams.
*July 7, 2010*

**Chemistry**

A student placed 17.0 g of glucose (C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 mL mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
*July 7, 2010*

**Chemistry**

How many kilograms of chlorine are in 22 kg of each of the following chlorofluorocarbons CFCs? 1.CF2Cl2 2.CFCl3 3.C2F3Cl3 4.CF3Cl
*July 7, 2010*

**Chemistry**

Determine the number of moles of oxygen atoms in each of the following. 5.91mol H2O2 2.7mol N2O 2.23mol CO2
*July 7, 2010*

**Chemistry**

Silver chloride, often used in silver plating, contains 75.27% Ag. Calculate the mass of silver chloride required to plate 195mg of pure silver.
*July 7, 2010*

**Chemistry**

Upon decomposition, one sample of magnesium fluoride produced 1.64 kg of magnesium and 2.57 kg of fluorine. A second sample produced 1.38 kg of magnesium. How much fluorine (in grams) did the second sample produce?
*July 7, 2010*

**college chemisrty**

A cylinder with a movable piston contains 2.00 of helium, , at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume was changed from 2....
*July 7, 2010*

**college chemisrty**

A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial volume was 3.00 and the initial pressure of chlorine was 1.65 . The piston was pushed down to change the volume to 1.00 . Calculate the final pressure of the gas if the ...
*July 7, 2010*

**college chemistry**

A closed container is filled with oxygen. The pressure in the container is 325 . What is the pressure in millimeters of mercury?
*July 7, 2010*

**chemistry**

Imagine that you have a 7.00 gas tank and a 3.50 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 115 , to what pressure should you fill the ...
*July 7, 2010*

**MATH**

a picture measures 16inches wide by 20inches long. if the frame is to be 20inches wide, what is the scale factor of the frame as a dilation of the picture, and what is the length of the frame?
*July 7, 2010*

**math**

which of the following triangles is both an obtuse triangle and isosceles triangle. A triangle with angles measuring: a) 60,60,60 b) 120,30,30 c) 110,15,55 d) 30,70,80
*July 7, 2010*

**math**

a picture measures 16inches wide by 20inches long. if the frame is to be 20inches wide, what is the scale factor of the frame as a dilation of the picture, and what is the length of the frame?
*July 7, 2010*

**math**

Bob constructed a decorative planter using 4inch squares attached to a rectangular base. what is the volume of the planter/
*July 7, 2010*

**math**

what is the total surface area in meters of a cylinder that is 12m in diameter and 14m in height
*July 7, 2010*

**math**

Victoria has two tea sets that are similar in size. The larger teapot is 12in tall and 6in wide. if the smaller teapot is 8in tall, how wide is it?
*July 6, 2010*

**math**

8/30=x/75 solve for x
*July 6, 2010*

**math**

Victoria has 2 tea sets that are similar in size. the larger teapot is 12in tall and 6in wide. if the smaller teapot is 8in tall, how wide is it
*July 6, 2010*

**math**

if it takes 8 quarts of ice cream to feed 30 people, how many quarts will it take to feed 75 people?
*July 6, 2010*

**math**

8/2=12/x what does x equal?
*July 6, 2010*

**english**

IN NEED OF HELP. I HAVE A FIVE PAGE ESSAY TO WRITE ON ANTIGONE AND I HAVE NO CLUE WHAT THIS POEM IS TALKING ABOUT. CAN SOMEONE HELP ME PLEASEEEEEEEEEEEEE
*July 5, 2010*

**MATH**

DOES ANYONE KNOW HOW TO DO THE GRATEST COMMON FACTOR IN THE 8TH GRADE?
*July 3, 2010*

**algerbra 1**

WELL I DONT KNOW BUT I THINK IT IS Y=-3X+3 SO YOU DID GOOD
*July 2, 2010*

**trig**

the leg opposite the 50 degree angle in a right triangle measures 8 meters. find the length of the hypotenuse
*July 2, 2010*

**trigonometry**

the leg opposite the 50 degree angle measures 8 meters. find the length of the hypotenuse
*July 2, 2010*

**physics**

Toby the cat is stuck in a tree. Billys dad placed a ladder 5 ft from the base of the tree and then leaned the ladder against the tree. the top of the ladder is where toby is sitting. if the ladder makes a 65 degree angle with the ground, how far up the tree is the cat?
*July 2, 2010*

**Literature**

Post a 150- to 300-word response to the following discussion question by clicking on Reply · Select one essay from this week’s assigned reading, and do the following: 1. Explain the most important difference between an essay and a short story, poem or play. 2. ...
*June 22, 2010*

**PreAlgebra**

Write the decimal as an equivalent percent. 0.282
*May 29, 2010*

**human relations**

a amjor obstacle to developing good human relations skills is that
*May 19, 2010*

**british literature**

DESCRIBE THE TONE OF "THE WANDERER."
*May 3, 2010*

**Chemistry**

i can somewhat help with this: temperature is not important so forget that part teke ur ml and convert to L by dividing 880 by 1000 thats as far as I know how to go hope it helps a lil bit ...
*May 1, 2010*

**Chemistry**

yep forgot the units sorry.
*May 1, 2010*

**Chemistry**

v1- 725/100 = .725 v2 - unknown t1- 240 C +273 K (to convert celcius to kelvin t2 - 54.5 C + 273 K V2 = .725 x 327.5 / 513 v2 = .462841 V2= .46
*May 1, 2010*

**Chemistry**

What is the final volume of 725 mL of neon gas at 240.°C if the gas is cooled to 54.5°C? Assume the pressure and the amount of gas are held constant.
*May 1, 2010*

**Chemistry**

To what Celsius temperature must 44.0 mm Hg of methane gas at 89.0°C be changed so the pressure will be 83.0 mm Hg? Assume the volume and the amount of gas are held constant.
*May 1, 2010*

**Chemistry!!!**

thankyou
*May 1, 2010*

**Chemistry!!!**

Is the molarity of a solution that contains 6 moles of solute in 2 liters of solution 12 M????
*May 1, 2010*

**Chemistry**

Its 2.7 thanks so much!
*May 1, 2010*

**Chemistry**

To increase the solubility of a gas at constant temperature from 1.20 g/L at 1.4 atm to 2.3 g/L what would the pressure have to be increased to?
*May 1, 2010*

**chemistry**

more
*May 1, 2010*

**still lost here**

ok im still lost...??
*May 1, 2010*

**chemistry**

If the solubility of a particular solute is 10 g/100 g H2O at 20 oC, which of the following would represent a supersaturated solution of that solute: a) 9 g/100 g H2O at 20 oC, or b) 11 g/100 g H2O at 20 oC.
*May 1, 2010*

**spanish**

What does "Que pantalones" mean
*April 27, 2010*

**civics**

Ok thank you
*April 26, 2010*

**civics**

I cannot find the answer to this question. In which local areas is the problem of balancing funding and services uasually most severe? a. rural areas, b. suburban areas, c. cities, d counties. I am guess the answer is D because the book states "local governments are ...
*April 26, 2010*

**civics**

Thank you
*April 26, 2010*

**civics**

I couldn't not find the answer to this in my book. The county form of local government is found in a. about half the states, b. all but two states, c.only 2 states, d. fewer then half of the states. I am guessing that since my book says " over the past century, the ...
*April 26, 2010*

**Grammar (will you check these please)**

Thanks to everyone that helped. Grammar is not my best subject.
*April 26, 2010*

**Grammar (will you check these please)**

Rewrite the sentence or phrase using comparative form of the adverb 1. Approach slowly. = Approach more slowly. 2. Get well. = Get better. 5. Come quickly. = Come more quickly. 6. favorably received = most favorably recieved 8. far away = farther away 9. come soon = come ...
*April 26, 2010*

**health**

I was just needing it checked sorry and thank you
*April 26, 2010*

**health**

list the movable joint in the correct column. ball-and-socket= Shoulder, Hip Gliding= backbone, neck, forearm Hinge= knee, elbow,toe, finger Pivot= Ankle, wrist
*April 26, 2010*

**accounting**

Shania Shelton, the owner, invested $105,000 cash, office equipment with a value of $6,000 and $45,000 of drafting equipment to launch the business in exchange for its common stock. Which journal entry would this be?
*April 25, 2010*

**english**

i dream therefore i exist what does this quote means
*April 22, 2010*

**Grammar**

Thank you
*April 19, 2010*

**Grammar**

12. QUITE AND LATE 13. This model airplane takes too much time to put together. TOO AND MUCH 14. I am so proud of you. SO AND PROUD 15. Those watches are practically indestructible. PRACTICALLY AND INDESTRUCTIBLE 16 These direction are very confusing. VERY AND CONFUSING 17. I ...
*April 19, 2010*

**Grammar**

Identify each intensifier and the word it modifies. 1. I am somewhat unclear about the details. SOMEWHAT AND UNLCEAR 2. Jorge's score on that test was nearly perfect. NEARLY AND PERFECT 3. Although I was quite nervous, I apeared calm and collected. QUITE AND NERVOUS 4. The...
*April 19, 2010*

**Chemistry**

Which of the following has the highest vapor pressure? CCl4 CBr4 CH3CH3 CH3CHBr2
*April 19, 2010*

**12th grade government**

_____ believed that there should be no limits to the power of the government once the will of the people was determined.
*April 15, 2010*

**Health Science**

How might incorporating a fitness plan and a balanced diet positively affect your well-being?
*April 14, 2010*

**college**

How can physical activity improve health and wellness?
*April 13, 2010*

**11th grade Algebra 2**

first you would have to find out how to cut 18 inches into 10 equal slices then multiply that by 3 I think
*April 12, 2010*

**Grammar (will you check the rest please)**

thank you
*April 12, 2010*

**Grammar (will you check the rest please)**

1. NOT MODIFIES FIND 2. BALL MODIFIES THREW 3. SOON MODIFIES SLEEP 4. FIRMLY, POLITELY MODIFIES ASKED 8. FOR MODIFIES MARKED 10. NOW MODIFIES ON 11. NOW MODIFIES IS 12. UNUSUALLY MODIFIES SEEMED 13. I DON'T KNOW DID IS THE VERB COULD THE ADVERB BE NEXT?
*April 12, 2010*

**Grammar (will you check the rest please)**

FIND THE ADVERB AND THE WORD IT MODIFIES 1. Mac looked everywhere for his jacket but could not find it.EVERYWHERE MODIFIES LOOKED AND FIND MODIFIES COULD 2. Tom threw the ball fast and hard. FAST, HARD MODIFIES THREW 3. Soon it will be time to go to sleep. SOON MODIFES TIME 4...
*April 12, 2010*

**Grammar (will you check the rest please)**

THANK YOU
*April 12, 2010*

**Grammar (will you check the rest please)**

5. NOW 7. SOFTLY NOT 13. EXTREMELY NOT
*April 12, 2010*

**Grammar (will you check the rest please)**

FIND THE ADVERBS 1. Pedro enthusiastically supported Zach's bid for student council president. ENTHUSIASTICALLY 2. Spend your money wisely. WISELY 3. Marissa waited quietly for the play to begin. QUIETLY 4. Lightly underline the words you want to emphasize. LIGHTLY 5. Now ...
*April 12, 2010*

**4th grade**

there were 93 students going to a nature camp.after equal groups of fewer for hiking,2 studentswere left over.how many equal groups were formed
*April 12, 2010*

**english**

happy families are all alike every unhappy familty is unhappy in its own ways" whats does this quote means
*April 12, 2010*

**health **

why is a healthy lifestyle important in school
*April 8, 2010*

**science **

the trend if any within the united states and comparison with other countries
*April 5, 2010*

**science **

the treatment being offered for the diseases
*April 5, 2010*

**science**

the cause of acidosis . the symptoms of acidosis and alkalosis
*April 5, 2010*

**Physics**

Q=(0.013125)(1650)(154) Q=3335.0 J/kg degree Celsius I got the 0.013125 by making 0.105g into kilograms them multiplying that number by 125. I got the 154 by subtracting 175-21.
*March 26, 2010*

**Math 116 algebra**

Part C is just as it says using elimination to get the right answer. I found it faster if you just use the first numbers exp 175*2=350 so, 7200-350=6850 well you know that 200 will not go into 6850 evening so you keep going 175*3=525 7200-525=6675 200 will still not go into ...
*March 25, 2010*

**Math 116 algebra **

yes thats right and part c and then question 3
*March 25, 2010*

**Math 116 algebra **

YES PART A IS RIGHT WHAT DID YOU GET FOR PART B OF QUESTION 2
*March 25, 2010*

**Math 116 algebra **

Sorry this is the answer to the 2nd question. Using the straight lines x + y = 56 and y = 3x, then they would intersect at x = 14 and y = 42
*March 25, 2010*

**Math 116 algebra **

I think this is right but I'm not sure on this part of your problem. from part a, x + y = 56, then at x = 0, y = 56. Therefore y-intercept = 56 at y = 0, x = 56. Therefore x-intercept = 56 from part b, y = 3x, then This is a straight line, passing through the origin ...
*March 25, 2010*

**Math 116 algebra **

well the 4 came because it says y = 3 times as many as x so for y to be 3 times as many as x there has to be 4 parts of 56 1 part is x and the remaining 3 are y. Does that help?
*March 25, 2010*

**Math 116 algebra **

I guess you could write it x+y=56 4x=56 56/4=x x=14 14+y=56 56-14=y y=52 I'm not sure how your teacher would want you to show your work. This way might be the simplest form
*March 25, 2010*

**Math 116 algebra **

x+y=56 x+3x=56 56/4= 14 x=14 56-14=42 y=42 check 14+42=56 or 14+(14*3)=56
*March 25, 2010*

**Math 116 algebra **

I don't think so The second part is giving you a way to solve the problem. so if you find out whay y is then you can find out what x is.
*March 25, 2010*

**Math 116 algebra **

because now you have 3x=y
*March 25, 2010*

**Math 116 algebra **

I think it would be x+3x=56
*March 25, 2010*

**Math 116 algebra **

I think it would be x+y=56
*March 25, 2010*

**Math**

I see well think you for showing me an easier and faster way to figure that problem out. I was taught the long way on most math problems.
*March 25, 2010*

**Math**

would you really have to multiply .08 and .12 by 100 or could you leave it the way it is?
*March 25, 2010*

**Math**

All you have to do is multiply parts of the 2500 by .08 and .12 then find which amount is the same. EXP 1250 * .08 = 100 1250 * .12 = 150 since those don't match go to 1300*.08 and 1200*.12 and so on untill you find the same answer
*March 25, 2010*

**Grammar (will you check the rest please)**

Thank you
*March 24, 2010*

**Grammar (will you check the rest please)**

Demonstrative Pronoun or Adjective? 1. Does anyone know how to bake this cake? ADJ 2. You can check that book out of the library tomorrow. ADJ 3. That singer is ainger is quite talented. ADJ 4. Those do not heat as well as some. PRO 5. Take these to the room down the hall. PRO...
*March 24, 2010*

**Grammar**

I have to know if these Demonstratives are Adjectives or Pronouns."These belong to the girl who lives next door" "This aisle contains what susan wants." "That ship has been docked for three days." I have them as pronoun and 2 adjectives. Is that ...
*March 24, 2010*

**grammar**

I have to know if these Demonstratives are Adjectives or Pronouns. "This appears to be the best seat available" "Please send me those in the mail."This will surely amuse Hannah's guest."
*March 24, 2010*

**Chemistry**

Which of the following ions has the smallest radius: Ca2+, K+, F-, or Cl-? Would it be K+, because it is a cation, making it have a smaller radius?
*March 23, 2010*

**Chemistry**

Rank the elements Ca, As, K, Br from highest to lowest first ionization energy. (Type your answer using the format W>X>Y>Z.) Would the answer be: K>Ca>As>B
*March 23, 2010*

**Chemistry**

Suppose you want a mixture that contains 2.5 grams of iron ion and three times as many moles of oxalate ion as moles of iron. If the iron comes from iron(iii)chloride and the oxalate ion from K2C2O4, how many grams of each of the compounds should you combine?
*March 10, 2010*

**Chemistry**

How many grams of iron ion are in 11 grams of K3Fe(C2O4)3?
*March 10, 2010*

**Math 208**

stan invested $5,000, part at 8% and part at 17%. intrest at the end of the year is $490, how much did he invest at 8%
*March 8, 2010*

**Chemistry**

118 g of a metal at 82.0°C are added to 50.0 g of water at 31.1°C. When the system reaches constant temperature, the temperature is 40.0°C. What is the specific heat of the metal? The specific heat of water is 4.184 J/g·°C.
*March 8, 2010*

**Chemistry**

46.9 g of a substance at 90.8°C is added to 51.8 g of water at 24.8°C. The final temperature of the water and substance is 40.5°C. The specific heat of water is 4.184 J/g·°C. What is the specific heat of the substance? I think the equation that I need to...
*March 8, 2010*

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