Monday

November 30, 2015
Total # Posts: 418

**chemisty**

12.00 liters of oxygen gas is under a pressure of 20 mm Hg. If the volume of this gas is decreased to 2.00 liters at constant temperature, what will the new pressure be? I believe this is Boyle's law and the answer should be 120 mm Hg, but according the answer on practice ...
*December 4, 2012*

**chemistry **

12.00 liters of oxygen gas is under a pressure of 20 mm Hg. If the volume of this gas is decreased to 2.00 liters at constant temperature, what will the new pressure be? I believe this is Boyle's law and the answer should be 120 mm Hg, but according the answer on practice ...
*December 4, 2012*

**chemistry **

Reaction: Na2CO3 + 2 HCl -> 2 NaCl + CO2 + H2o How many grams of NaCl can be produced from the reaction of 1.35g of Na2CO3 with 125mL of 0.265 M HCl?
*November 30, 2012*

**CHEMISTRY**

Cant figure this out, I feel like the answer I keep getting is way too low. A voltaic cell is constructed that is based on the following reaction: Sn2+ (aq) +Pb(s) = Sn(s) + Pb2+ (a) If the concentration of Sn2+ in the cathode compartment is 1.00M and the cell generates an emf...
*November 30, 2012*

**Chemistry**

THANK YOU!
*November 29, 2012*

**Chemistry**

Hi everyone, I have been trying to figure out this titration equation all day and for some reason I am stumped. Here is the question in full: Potassium hydrogen phthalate, KHP, can be obtained in high purity and is used to determine the concentrations of solutions of strong ...
*November 29, 2012*

**Language**

What part of speech are the following words this, of, books, sighed, heavily, doctor,ask, you, address, auscultated, are, bruits, read, last, and, my, will follow up, yesterday, tomorrow, gift, call it, present, always, on
*November 14, 2012*

**Pre-calculus**

A sailboat leaves port and sails for 7 miles NE and then 9 miles NW. If the speed remains constant, what bearing would take the sailboat home?
*November 13, 2012*

**Math**

A farmer has 20 pigs ans sheep.he has 6 fewer sheep than pigs. How many pigs does he have?
*November 7, 2012*

**Chemistry**

Answer is 1.104L Oh remember that there are 0.028 mol in 1.88g of NaN2. Final, in 0.028mol of NaN3, there is 0.042 mol of N2. This is your n. so, V= ( nRT)/P remember, you are given R, T and P Hope this helps:)
*November 2, 2012*

**Chemistry**

Answer is 1.104L
*November 2, 2012*

**HOW TO STARE YOUR DAY CARE FACILIY**

THE LARGEST NON PROFLT ASSOCIATION IN THE UNITED STATES REPRESENTION EARLY CHILDHOOD EDUCATION IS THE
*October 30, 2012*

**chil development**

keeping systematic record of observations of children provid useful information for
*October 23, 2012*

**7th grade Math**

Yes,yes :)
*October 21, 2012*

**math**

Can you show 2 hundredths using only tenths place value blocks?
*October 18, 2012*

**child development**

agood technique to prevent children from talking to you while you,re observing is to.
*October 17, 2012*

**Chem**

Poop
*October 10, 2012*

**Biology**

Inducible
*October 9, 2012*

**world history**

Conversion of kings and other elite figures
*October 6, 2012*

**Shelving units**

The average thikness of a medical chart is 1/4 inch. If a practice has 1200 patients with each chart 1/4 inch thick, how many shelving units will it take if a unit can hold 368 inches.
*September 27, 2012*

**AP chemistry**

32.0102
*September 5, 2012*

**math**

there Are four children in a family, the sum of the squares of the ages of the three youngest children equals the square of the age of the oldest child. How old are all the children.
*August 28, 2012*

**Calc **

A paper cup is to be designed in the shape of a right circular cone. It must have a capacity of 12 fluid ounces (1 fluid ounce = 1.80469 cubic inches) of soft drink but it must use a minimum amount of material in its construction. What should the dimensions of this paper cup ...
*July 30, 2012*

**Chemistry**

Use Ksp to find the concentration of an ion in a saturated solution. Consider a 2.50E-3 M solution of Al2(SO4)3. (a) What [OH^-] is required to initiate precipitation of Al^3+ from the solution? (b) What [OH^-] is required to lower the [Al^3+] to 2.00E-7 M ?
*July 28, 2012*

**Chemistry**

Given a diprotic acid, H2A, with two ionization constants of Ka1 = 3.9× 10–2 and Ka2 = 5.9× 10–8. Calculate the pH and molar concentrations of each protonated form for a: (a)0.135 M solution of H2A pH= [H2A]= [HA]= [A2-]= (b)0.135 M solution of NaHA pH= [...
*July 21, 2012*

**Chemistry**

I'm not getting the right answers for the pH, [H2A], and [HA^-] in part a (0.135 M solution for H2A) For H2A, I did 3.9E-2=x^2/(.135-x) Using the quadratic formula: x^2+.039x-.005265=0 x=.06725 [H^+]=[HA^-]=.06725 M pH=-log(.06725)=1.17 Finding [H2A]=.135 M-.06725 M=.06775...
*July 21, 2012*

**Chemistry**

Given a diprotic acid, H2A, with two ionization constants of Ka1=3.9E-2 and Ka2=5.9E-8. Calculate the pH and molar concentration of each protonated form for a 0.135 M solution of: (a) H2A (b) NaHA (c) Na2A
*July 21, 2012*

**algebra**

equivalent expression for 2log(x+1)-2log(x-1)-log(x-1)
*July 5, 2012*

**science**

two tall buildings are 200m apart .with what speed must a ball be thrown horizontally from the window 540 m above the ground in one building, so that it will enter a window 50m above the ground in the other?
*July 1, 2012*

**statistics**

how large a sample size is needed for 2 sided 95% confidence interval to have a length of 2 weeks when mean is 3.6
*June 28, 2012*

**physics **

a missile is launched an angle of 26.5 with respect to the horizontal. if it travels in the straight line over the level Terran for 2 minute and its average speed is 6000 mile per hour. what is its altitude?
*June 23, 2012*

**physics**

a television antenna is on the roof of the building. from a pt. on the ground 36.0 feet from the building , the angle of elevation of the top and the bottom of the antenna are 51 degree celsiusand 42 degree celsuis respectively. how tall is antenna?
*June 23, 2012*

**Calculus help~!**

Which is the standard form of the equation with p = 26, O= 3pi/4 ? SQRT2x – SQRT2y = 0 SQRT2x – SQRT2y + 52 = 0 SQRT2x + 52 = 0 SQRT2x + 52y = 0
*May 8, 2012*

**algebra**

the product of two consecutive even integersis 34 less than 7 times their sum.find the two integers.
*May 7, 2012*

**algebra **

One number is 10 more than twice another.Their product is 10 more than twice their sum.Find the numbers.
*May 7, 2012*

**HISTORY**

thank you bobpursley!
*May 4, 2012*

**HISTORY**

In 2001, President George W. Bush signed the Economic Growth and Tax Relief Reconciliation Act of 2001 (EGTRRA). This bill called for large tax cuts just as the Economic Recovery Act of 1981 had and largely benefited the wealthiest Americans. President Bush’s approach to...
*May 4, 2012*

**english**

this summer I will be going to a theme park with my best friend will go too. It will be fun. Because I like when I get to go with friends. I've never been to this theme park before I heard it is very fun. Someone in my class. ITold me that there is a rollercoaster that is ...
*May 1, 2012*

**Chemistry**

Find the molecular formula of a compound that is 48.38% carbon, 8.12% hydrogen, and 53.5% oxygen by mass and has a molecular weight of 328 g/mol.
*April 23, 2012*

**Chemistry**

A 15mL sodium hydroxide solution of unknown concentration is titrated with 34.5 mL of 1.2M HCl solution. What was the concentration of the sodium hydroxide solution?
*April 23, 2012*

**Chemistry**

A 12 mL sample of 0.4 M silver nitrate solution is mixed with 8 mL of 0.8 M sodium chloride solution. Determine the identity of precipitate and the number of grams produced.
*April 23, 2012*

**Math**

Math huron scored 84% on her last history test. Of she got 21 answers correct , how many question did the test have?
*April 15, 2012*

**Math**

Math huron scored 84% on her last history test. Of she got 21 answers correct , how many question did the test have?
*April 15, 2012*

**accounting**

which one of the following contingencies must be accrued on the balance sheet
*April 8, 2012*

**physics**

faaaanx -xoxoa jo h.
*March 23, 2012*

**chemistry**

hello i'm doing a redox stoichiometry lab having to do with titration 6H +5H2O2 + 2MnO4 -- 5O2 + 2Mn2+ + 8H2O Why is H2O2 the source of O2 product in this titration?
*March 22, 2012*

**englsih**

in the poem the sloth by theodore roethke is there any personification, alliteration, imagery or onomatopoeia
*March 13, 2012*

**Math**

How many lines of symmetry does a regular decagon have? 0 5 10 20 I believe the answer is 10. Thanks for the help :)
*March 13, 2012*

**Physics**

The pulley system shown in the figure is used to lift a 52-{\rm kg} crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. The crate is rising with an acceleration of 2.5 m/s^2. Determine the tension in ...
*March 10, 2012*

**chem**

how do you tell which reactant is limiting reactant with the following information: mass of cup 55.78g mass o/sodium bicarbonate 1.01g mass o/citric acid 1.52g toal mass 58.31g mass of cup,solute after reaction 59.95g mass o/carbon dioxide .42g H3C6H5O7(aq) + 3 NaHCO3(aq) &#...
*March 9, 2012*

**math 2nd grade**

The word 'of' means to multiply. 3/5 of 10 3/5 X 10 = 30/5 = 6 1/3 of 12 1/3 X 12 = 12/3 = 4 hope this helps.
*March 5, 2012*

**Math**

3:18 9:54 and 6:36 Notice how you have to multiply the first number by 6 to get the second number. Hope this helps!
*March 5, 2012*

**math**

360/18 = x/1 One is the unit rate. Find X. 18 divide by 18 equals one. So take the 360 and divide by 18 which equals 20. Therefore x = 20. Hope this helps.
*March 5, 2012*

**7th grade math**

1.772453851(and then some more)
*March 5, 2012*

**math**

(1)Look at a ruler on the inches side. Notice between the zero and one there are little dashes. There should be 16 betweeen zero and one. 16 between one and two... Each dash is a sixteenth. So every other one is an eighth. (2) You want 10 inches out of 12 inches. Therefore 10/...
*March 5, 2012*

**8th grade math**

Parallel equations have the same slope. y = mx + b Perpendicular equations have a reciprocal and opposite slope. There is more to these questions than space allows here. Go to Khan Academy to view video's on how to do these equations.
*March 4, 2012*

**8th grade math**

2x = y + 1/2 Subtract y from both sides. 2x - y = 1/2 Done! Check out "khanacademy" for video's on how to solve Alebra problems.
*March 4, 2012*

**5th Grade Math**

Fluis ounces.
*March 4, 2012*

**Maths 10th grade**

x2 - 6x + m -3 = 0 x2 - 6x - 3 = -m Is a start. Then use the Quadradic Formula to find the factors.
*March 4, 2012*

**biochemistry**

explain the role of protein misfolding and aggregation in bovine spongeform encephalopathy
*March 1, 2012*

**Math**

3 x 2 = 6 square miles divided in half equated 3 square miles
*March 1, 2012*

**Math**

3 miles
*March 1, 2012*

**math 2nd grade**

otis
*February 29, 2012*

**math 2nd grade**

francisco
*February 29, 2012*

**English**

Punctuate the sentence. misty could you walk ms millers dog on Tuesday mom asked
*February 29, 2012*

**Chemistry**

H3C6H5O7(aq) + 3 NaHCO3(aq) ¨ Na3C6H5O7(aq) + 3 H2O(l) + 3 CO2(g) How do you go about calculating theoretical yield of carbon dioxide from 1.00g of sodium bicarbonate andthe percentage yield
*February 28, 2012*

**college algebra**

do you have a graphic calculator
*February 28, 2012*

**Physics**

A sled which has a mass of 45kg is sitting on a horizontal surface. A force of 120 N is applied to a rope attached to the front of the sled such that the angle between the front of the sled and the horizontal is 35 degrees. As a result of the application of this force the sled...
*February 25, 2012*

**math**

The sum of the digits of a two-digit number greater than 50 is 12. The difference between the digits is 4. Find the two-digit number
*February 11, 2012*

**Maths**

4x-2=14x-92
*January 30, 2012*

**college algebra**

Solve the following equation in the complex number system. Please show all of your work. 2x^5-3x^4-32x+48=0
*January 18, 2012*

**precal**

For the given functions f, g, and h, find fogoh and state the exact domain of fogoh. Please show all of your work. f(x)=lnx g(x)=|x|-2 h(x)=4x-7
*January 18, 2012*

**College Algebra**

Verify that the function f and g, are inverses of each other by showing that f(g(x))=x and g(f(x))=x. Graph both the functions on the same graph. Please show all of your work. f(x)=-7/x-4 g(x)=4x-7/x
*January 18, 2012*

**College Algebra**

Solve the logarithmic equation. Express your solutions in exact form only. Please show all of your work. log base 6 (64x^3+1)-log base 6 (4x+1)=1
*January 18, 2012*

**College Algebra**

Find the inverse of the function below. Graph the function below and the inverse function. Determine the domain, range, and asymptotes of the function below and the inverse function. Please show all of your work. Show both graphs. f(x)=2ln(3-x)+6
*January 18, 2012*

**chemistry**

When a sample of carbon dioxide gas is at 36 degrees and 105 kpa is heated the new pressure of the gas becomes 165kpa. Determine the new temperature. Assume volume and amount of gas remain constant.
*January 15, 2012*

**history**

In the movie Lakota Woman- Siege at Wounded Knee; I need to understand what the alienation isues that Mary Crow Dog regarding her family. Do you have any ideas on where I can find this informaton?
*January 8, 2012*

**human services**

In the movie Lakota Woman- Siege at Wounded Knee; I need to understand what the alienation isues that Mary Crow Dog regarding her family. Do you have any ideas on where I can find this informaton?
*January 8, 2012*

**Calculus**

A balloon is rising vertically above a level, straight road at a constant rate of 1 foot/second. Just when the balloon is 65 feet above the ground, a bicycle passes under it going 17 feet/sec. How fast is the distance between the bicycle and balloon increasing 3 seconds later?
*October 25, 2011*

**Calculus**

A particle is moving along the curve whose equation is (xy^3)/(1+y^2)= 8/5. Assume the x-coordinate is increasing at the rate of 6 units/second when the particle is at the point (1,2). At what rate is the y-coordinate of the point changing at that instant? Is it rising or ...
*October 25, 2011*

**Physics**

An autographed baseball rolls off of a 0.85 m high desk and strikes the floor 0.68 m away from the desk. How fast was it rolling on the desk before it fell off? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s
*October 24, 2011*

**Physics**

In a portable deﬁbrillator, energy is stored in a capacitor charged to a high potential diﬀerence. The capacitor is discharged through the patient’s body in a short, high-powered pulse. a) The capacitor in a portable deﬁbrillator is charged to 5000 V ...
*October 5, 2011*

**statistics**

given the following population data, x=17,13,23,15,19,19,21,28 calculate the z score value for a score of 18.
*September 19, 2011*

**math**

what is the rule for input 36 output 9 input 17 output 9 input 24 output1 input 18 output 0
*September 13, 2011*

**maths **

When Sandy decreased her savings by 75% and Gene increased hers by 40%, they would save $280 each. What were their total savings at first?
*September 8, 2011*

**maths**

Amy had 20% more money than John. After she spent 50% of her money, she had $72 less than John. How much money had she left?
*September 8, 2011*

**Maths**

At present, the ratio of Ann's age to Pamela's age is 4:3. Six yrs ago, their total age was 72yrs. what is Pamela's presnt age?
*September 8, 2011*

**Maths P5**

Mr Neo has fewer than 200 sweets. He wants to give his class an equal number of sweets. If he gives each pupil 3 sweets, he will have 70 left over. If he gives 5 sweets, he will need 10 more sweets. How many pupils are there in the class? How many sweets does Mr Neo have?
*August 21, 2011*

**Maths P5**

Cindy went to the store with just enough money to buy 11 files.However, she bought only 8 files and spent the rest of her money on 24 pens and rulers. The ratio of the number of pens to rulers was 3:5. Each ruler costs $0.80. Each pen costs $0.40 more than a ruler.How much did...
*August 21, 2011*

**Maths P5**

Daniel, Susan and Rick bought some cookies to sell. The cookies were sold at 6 for $2. Daniel sold 1/4 of the cookies. Susan sold 2/7 as many cookies as Rick. Daniel and Susan sold a total of 120 cookies. a)How many cookies did they sell altogether? b)How much did they collect...
*August 21, 2011*

**maths**

there are 15 guppies, 14 angelfish and 5 goldfish in a tank. how many guppies and goldfish must be added so that the ratio of guppies to angelfish to goldfish is 9:7:5
*August 20, 2011*

**Maths**

60% of the people on a bus are male. After 1/3 of the males alighted from the bus, what percentage of the people left on the bus are females?
*August 20, 2011*

**statics**

test 55%answer correct 44 correct answers how many questions on test
*August 8, 2011*

**chem**

why is hexane known as hydrocarbon?
*July 20, 2011*

**alegbra**

what is 6y square -5y -2??
*June 21, 2011*

**spanish**

I need someone to edit a spanish article for me. I can just email it to you if you leave your email here. Thanks!
*June 7, 2011*

**chemestry**

A gas is contained in a metal cylinder with a piston, so that the volume of the cylinder can change. If the gas initially occupies volume of 664 ml at 471 mmHg, what will be the volume if the temperature is kept constant and the pressure is changed to 408 mmHg?
*May 17, 2011*