Sunday

May 1, 2016
Total # Posts: 81

**Chemistry**

You were right the answer was -20600.
*April 22, 2016*

**Chemistry**

q=mass*Specific heat of liquid*change in temp q=42*4.18*35=6144.6 q=mass* specific heat of ice*change in temp q=42*2.03*5=426.3 q=heat of fusion of ice*moles q=6010*2.3=14023 Then add all three together and get 20593.9 Joules
*April 22, 2016*

**Chemistry**

Calculate the heat released when 42.0 g of water at 35.0 degrees Celsius is converted to ice at -5.0 degrees Celsius. The specific heat of ice is 2.03 J/(g C), the molar heat of fusion of ice is 6010 J/mol, and the specific heat of water is 4.18 J/(g C) (Hint: Be sure to ...
*April 22, 2016*

**Chemistry**

Which of the following has the highest boiling point? (Think of intermolecular forces) CHCl3, CH4, CH2Cl2, CH2I2, CHBr3, CHI3 Ive tried to answer this question twice and have one attempt left. Here's what I've done: CHCl3 -Boiling Point: -61.2 Degrees C -Molar Mass: ...
*April 22, 2016*

**Chemistry**

nevermind I figured it out
*March 26, 2016*

**Chemistry**

0.573 g of calcium chloride reacts with excess of 0.5 M Na3PO4 to form .523 g of isolated calcium phosphate precipitate. Determine theoretical yield, actual yield, and percent yield for this reaction.
*March 26, 2016*

**Chemistry**

Thank You!
*March 26, 2016*

**Chemistry**

Under certain conditions, nitrogen gas reacts with oxygen gas to form nitrogen monoxide gas. How many total electrons are transferred for each molecule of nitrogen or oxygen?
*March 26, 2016*

**Chemistry**

Thank You!!
*March 25, 2016*

**Chemistry**

Is this answer correct? I looked up in the computer and it said the answer is supposed to be 270.84g of CO2 but I thought I did this problem right.
*March 25, 2016*

**Chemistry**

If 116g of butane burns in presence of 320g of oxygen, how much carbon dioxide will be produced? What is limiting reagent? So This is how I worked it out: 116gC4H10*1/58.12(molar mass of C4H10)*8 moles CO2/2 moles C4H10*44/1(molar mass of CO2)=351.27g of CO2
*March 25, 2016*

**Chemistry**

Mothballs are composed of a chemical called naphthalene which has a formula of C10H8 a) what is the mass of a single naphthalene molecule in amu? b) what is the molar mass of naphthalene? c) what is the mass of a single naphthalene molecule in grams? I think I got b: 128.16 g/...
*March 22, 2016*

**Chemistry**

Well, If Fe atomic mass is 55.85 and O is 16, then multipy 55.85 by two and 16 by 3 and get 159.7 g/mol. Then divide 17g by 159.7 g/mol and get .106 moles.
*March 22, 2016*

**Chemistry**

How many moles of compound are present in 17g of Fe2O3? I think I know how to do this, so if someone can show me so I can check my work against it. My answer was .106 moles of Fe2O3.
*March 22, 2016*

**Chemistry**

It wasn't a typo. It is (PO3)2 So you are saying it should be a) 11 moles of atoms b) 1 mole of PO3^3- ions c) 2 ions of PO3^3- ions (because of the subscript 2 that follows (PO3)2)
*March 22, 2016*

**Chemistry**

a) how many moles of atoms are in 1 mole of Ca3(PO3)2 b)If I have 1 mole of Ca3(PO3)2, how many moles of PO3^3- ions do I have? c)How many individual PO3^3- ions do I have?
*March 22, 2016*

**Math**

Oh wait, I see what I did wrong. So would it be 12 then?
*February 22, 2016*

**Math**

I got 48/64, which doesn't make sense. If the original copy is 16 cm, wouldn't the reduced copy be smaller?
*February 22, 2016*

**Math**

A diagram measuring 20 cm long is reduced on a copy machine to 15 cm long. If the width of the original copy is 16 cm, what is the width of the reduced copy? Show your work.
*February 22, 2016*

**Question**

What it another word for stupid?
*February 17, 2016*

**Language PLZZ HELP ME!!!!!**

I'm really sure number five be A??
*February 16, 2016*

** Language PLZZ HELP ME!!!!!**

"Full Fathom Five" by - William Shakespeare Full fathom five thy father lies; Of his bones are coral made; Those are pearls that were his eyes; Nothing of him that doth fade But doth suffer a sea change Into something rich and strange. Sea nymphs hourly ring his ...
*February 16, 2016*

**Language **

Fathom Five" by - William Shakespeare Full fathom five thy father lies; Of his bones are coral made; Those are pearls that were his eyes; Nothing of him that doth fade But doth suffer a sea change Into something rich and strange. Sea nymphs hourly ring his knell; Ding-...
*February 16, 2016*

**Art**

During which time period were artists keenly interested in using the golden ratio in their paintings? A.Baroque Period B.Oriental Period C.Futuristic Period D.Renaissance Period •• When the Greeks built the Parthenon its dimensions nearly matched the golden ratio ...
*February 11, 2016*

**Language **

The rusty spigot sputters, utters a splutter, spatters a smattering of drops, gashes wider; slash, splatters, scatters, spurts, finally stops sputtering and plash! gushes rushes splashes clear water dashes 3. What is happening in “Onomatopoeia”? A. A rusty faucet ...
*February 11, 2016*

**Language Arts**

So it's A
*February 11, 2016*

**Language Arts **

Train Tune” by - Louise Bogan Back through clouds Back through clearing Back through distance Back through silence Back through groves Back through garlands Back by rivers Back below mountains Back through lightning Back through cities Back through stars Back through ...
*February 11, 2016*

**Language Arts**

So it's C??
*February 11, 2016*

**Language Arts **

Full fathom five thy father lies; Of his bones are coral made; Those are pearls that were his eyes: Nothing of him that doth fade But doth suffer a sea-change Into something rich and strange. The Tempest. Act i. Sc. 2. what is the best paraphrase of the line "full fathom...
*February 11, 2016*

**Sciences **

What is a substance that cannot be separated into simpler substances by physical or mechanical methods such as filtering, boiling, or sifting? A crystalline solid A sublimation A pure substance •• An amorphous solid Correct me if I'm wrong
*February 10, 2016*

**Science**

Is my answer right??
*February 10, 2016*

**Science**

An object weighing 90 N has a volume of 45 mL and a mass of 9.0 g. What is its density? A. 0.10 g/mL B. 0.20 g/mL •• C. 5.0 g/mL d. 10 g/mL correct me!!
*February 10, 2016*

**Math HELP PLZZ!!**

1. To ________________ means to cut into two congruent parts. A: intersect B: bisect •• C: construct D: divide 2. Which tool is not needed to construct a perpendicular bisector? A: compass B: pencil C:protractor •• D: straightedge 3. Which point is the ...
*February 10, 2016*

**Art PLZZZ CORRECT ME!!!!**

Blue mountains rise in the distance while a small cottage sits amidst rocks and trees. Blue and Green Landscape by Shi Jui The Walters Art Museum, Baltimore 1.This Chinese painting is composed tall cliffs in the background and a small building with trees in the foreground. ...
*February 10, 2016*

**Trig**

An air traffic controller tells the pilot of an airplane flying due east to turn the plane so that it has a heading of 120 degrees east of north. What angle does the airplane turn and which direction is the plane now headed?
*January 13, 2016*

**math**

Jonah wants to buy two copies of a book. Which algebraic expression could Jonah use to find the value of the items?
*October 7, 2014*

**Math**

Jim has 4 x g =48. If he gets g more. What is the number for g ?
*February 10, 2014*

**chem 2**

81.9 because the products is 2 and if you add the reactants up it'll be 2 so 2-2=0 so you multiply R*T and you get 24.45388 and if you take it to the 0tg power it'll be 1 so 81.9/1 is 81.9 and that's your answer
*October 6, 2013*

**Chemistry**

Microwave ovens emit microwave energy with a wavelength of 12.5 cm. What is the energy of exactly one photon of this microwave radiation?
*September 24, 2013*

**geometry**

A 45 degree arc of circle D has the same length as a 30 degree arc of circle E. what is the ratio of the radius of circle D to the radius of circle E?
*May 21, 2013*

**math**

71.33= 9/5k - 459.67 solve for k
*May 9, 2013*

**math**

whats 70.00 the selling price (this part percent whole) sales tax 5 percent so whats the sales tax
*February 1, 2013*

**Physics**

Light is incident from water onto a flat transparent slab of material, at an angle of 48.8° with the normal. The reflected ray and the refracted ray are perpendicular to each other. What is the index of refraction of the transparent substance?
*January 24, 2013*

**physics**

an object's acceleration is given by the function a= 2/v^2, determine an expression for the velocity of the object as a function of time. (at t= 0, v=0)
*January 12, 2013*

**physics**

an object's acceleration is given by the function a= 2/v^2, determine an expression for the velocity of the object as a function of time. (at t= 0, v=0)
*January 12, 2013*

**AFM**

Show the solutions of the two examples given in the notes. (Hint: Finding a "solution" means solving for all missing sides and angle measures in each triangle.) (a) If a = 4, b = 3, and A = 36o. (b) If a = 3, b = 4, and A = 48.59o
*January 3, 2013*

**English**

At what point does abigail first begin feeling cold
*December 8, 2012*

**Calculus**

A rectangular play area is to be fenced off in a person's yard and is to contain 108 yd^2. The next-door neighbor agrees to pay half the cost of the fence on the side of the play area that lies along the property line. What dimensions will minimize the cost of the fence?
*October 16, 2012*

**Chemistry DrBob222**

No, 0.30 isn't right either. I'm going to ask my prof about it tomorrow.
*March 2, 2012*

**Chemistry**

No, that didn't work. I even tried using your Kb value but that still wasn't right.
*March 2, 2012*

**Chemistry**

What stoichiometric concentration of the indicated substance is required to obtain an aqueous solution with the pH value shown below? aniline (C6H5NH2) for PH of 9.05 I converted pH to pOH so pOH=4.98 [OH-] =1.122*20^-5 C6H5NH2 + H2O --------> C6H5NH3+ + OH- I: a N/A 0 0 C...
*March 2, 2012*

**Math**

Suppose 27 out of 50 people living in one neighborhood of a communtity excersise reguarly. How many people in a similar community of 2,600 pepople can be excpcted to excersise reguarly?
*February 5, 2012*

**History**

How had U.S. policy toward Europe changed by the end of 1947? Why did this change occur?
*January 22, 2012*

**HISTORY**

Thank you
*January 22, 2012*

**HISTORY**

What did George Kennan mean by “containment”? Why did he think it would be a successful strategy?
*January 22, 2012*

**math**

there are 33 students in Miss benton's class. There are 5 more girls than boys. How many girls are in Miss Bentons class
*December 13, 2011*

**algebra2**

simplify 216 (1/4) slove for the variable 8a-9=7a-6 find the slope of (0,2),(-2,-2) find the slope of 2x+4y=8
*October 19, 2011*

**Algebra 1a**

Graph the number on the number line 3 - 2
*September 27, 2011*

**Algebra 1a**

translate 38 less than q to algebraic expression
*September 27, 2011*

**3rd grade math**

37
*September 6, 2011*

**Chemistry**

A gas expands from 282 mL to 971 mL at constant temperature.Calculate the work done (in joules) by the gas if it expands against a constant pressure of 6.00 atm.
*March 28, 2011*

**modeling exponential growth**

hey. the directions say identify the initial amount "a" and the growth factor "b" in each exponential function. i've looked at the examples given and i still dont understand. the first problem is g(x)=20x2^x or g(x) equals twenty times two to the "...
*March 14, 2011*

**science**

A 60.0-mL 0.508 M glucose (C6H12O6) solution is mixed with 115.0 mL of 2.43 M glucose solution. What is the concentration of the final solution? Assume the volumes are additive.
*February 27, 2011*

**Chemistry**

Calculate the molarity of 15.4 g of ethanol (C12H22O11) in 71.0 mL of solution
*February 27, 2011*

**7th grade**

for a science project what questions can you ask about things that has to do with scientific process and how to solve it through forming hypothesis and give evidence about it like a question about population or something..
*December 13, 2010*

**4th grade**

I spent $40.00 on a sweater and a shirt. The sweater cost $12.00 more than the shirt. How do I figure this out. I thought the answer was $28.00 but that is not right
*September 27, 2010*

**CIS 105**

thanks
*September 21, 2010*

**CIS 105**

Here is the assignment: Use information and data obtained from at least four reliable internet sources to produce a 12- to 15-slide PowerPoint® presentation about multimedia tools that aid classroom instruction. Include details about how each might influence learning. ...
*September 21, 2010*

**8th grade**

How do you diagram the following sentence: Who bravely dares must soemtimes risk a fall.
*May 23, 2010*

**math**

solve the equation 2a-4>3a
*November 22, 2009*

**Math Expressions**

142 x n is between 150 and 280
*November 2, 2009*

**History**

7 unifying characteristics of los angele's?
*September 7, 2009*

**ART**

Work that shows life and bright colors something that pos aot.
*August 9, 2009*

**Science**

What is the arrangement of the objects in the universe from largest to smallest
*January 28, 2009*

**9th grade**

300 yards per 1 minute. Find the unit rate in feet per second.
*November 19, 2008*

**Enviornmental Science**

what can i look up for a resource that is or can be depleted if excessively used without time to replenish
*September 11, 2008*

**math**

if you know your order of operations its quite simple if you dont these are it. Parenthesis Exponents Multiplication & Division(from left to right.which means if division comes before multiplication do it first but if multiplication comes before division do that first. so what...
*September 11, 2008*

**Math**

Walter has a vegetable garden in the shape of a regular pentagon.How much fencing will he need to enclose his garden if one of its sides measure 4.06 meters?
*September 3, 2008*

**English**

Need help. My teacher wants me to write a short story using 5 root words? What does she mean?
*April 7, 2008*

**math**

I spent $40.00 on a sweater and a shirt. The sweater cost $12.00 more than the shirt. How do I figure this out. I thought the answer was $28.00 but that is not right
*June 11, 2007*

- Pages:
**1**