Wednesday

November 25, 2015
Total # Posts: 60

**Chemistry**

A student performed an experiment to determine the molecular weight of a gaseous compound. Using the ideal gas law PV = nRT, and knowing the pressure, temperature, and volume of the vapor, the student calculated the number of moles of gas, n, to be 0.0443 mol. The weight of ...
*November 15, 2015*

**Chemistry**

The approximate concentration of a hydrochloric acid solution is 0.5M. The exact concentration of this solution is to be determined by the titration with 0.5M solution of sodium hydroxide. A 10.00 ml of HCl solution was transferred by pipet to an Erlenmeyer flask. What is the ...
*May 17, 2015*

**math**

Dera mom i love you so much do you love me
*June 6, 2014*

**Science**

All these answers were correct when I used them. I got a 100%! Thank you!
*March 4, 2014*

**Algebra**

I'm confused regarding the elimination method for 5x - 7y = -16, 2x + 8y = 26
*November 9, 2013*

**Science**

A rectangular brick measures 6cm by 9cm by 20cm and has a mass of 2.563 kilograms. What is the density of the brick in grams per cubic centimeter?
*October 27, 2013*

**Percy Jackson:Lightning Thief**

Ok. What is a motif, though?
*August 27, 2013*

**Percy Jackson:Lightning Thief **

What is the motif in "Lightning Thief" ?
*August 27, 2013*

**definition**

What is a motif?
*August 26, 2013*

**fractions**

What are some helpful hints or tips about fractions?
*August 22, 2013*

**fractions**

Write the following fraction as a numeral: One piece of pie from a pie that is cut into six parts. Please check: 1/6
*August 21, 2013*

**analogies**

How do I put this into 2 sentences? up:down heavy:light For example: water:liquid ice:solid Water is a type of liquid. Ice is a type of solid.
*August 13, 2013*

**Percy Jackson:Lightning Theif **

I have to print some pictures about or from the book "Lightning Theif" Does anyone know some pictures? *It cannot be from the movie.
*August 3, 2013*

**GEOMETRY(SURFACE AREA)**

18.63
*July 14, 2013*

**Finite Math**

Two balls are drawn from a bag with 4 black balls and 2 white balls. Find th probability distribution got drawing 2 black balls.
*June 16, 2013*

**Pre-Calculus **

A surveyor measures the distance between buildings X and Y as 200 feet. The angle of elevation from the base of X to the top of Y is 25 degrees. What is the height of building Y?
*May 20, 2013*

**History**

I need help please I am not understanding what my instructor means by "trace the contextof the question across the entire sweep of time, from pre history to c. 1500CE, converting at least 3 separate eras as they are viewed in at least three world culture areas. World ...
*February 15, 2013*

**World history**

"As his power grows, Charlemagne proves himself a mastermind, next to military and civil government." In what ways?
*February 14, 2013*

**World civilizations **

Although most students begin by assuming settled farming life was better than that lived by hunter-gatherers, closer acquaintance with full Paleolithic Hunter-Gatherer life shows us many aspects that could be considered easier than that of very early, settled Neolithic farmers...
*January 28, 2013*

**physics**

What is the pressure inside a 33.1 L container holding 109.1 kg of argon gas at 399 K?
*November 12, 2012*

**math**

5th grade math equations
*September 25, 2012*

**physics**

A 1.5-kg block rests on top of a 7.5kg block. The cord and pulley have negligible mass, and there is no significant friction anywhere. Part a) What force F must be applied to the bottom block so the top block accelerates to the right at 2.9 m/s^2 ? Part b) What is the tension ...
*May 7, 2012*

**physcis**

well noone answered it and so i reposst it. thank you for your responnse but the last message was not needed.
*May 7, 2012*

**physcis **

What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.82?
*May 7, 2012*

**physics**

Question # 1 : What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.82? Question # 2 : A 1.5-kg block rests on top of a 7.5kg block. The cord and pulley have negligible mass, and there is no significant ...
*May 7, 2012*

**physics **

Question # 1 : What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.82? Question # 2 : A 1.5-kg block rests on top of a 7.5kg block. The cord and pulley have negligible mass, and there is no significant ...
*May 7, 2012*

**Math**

idk
*May 5, 2012*

**statistics**

The data set given below has y^ = 3x - 5 for its regression equation. Find the standard error of estimate. x 3 2 5 8 y 4 1 10 19 A) 1.29 B) 0 C) 2.06 D) 0.17
*March 23, 2012*

**Biology**

A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong.
*September 17, 2011*

**Biology**

A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong.
*September 17, 2011*

**Math 118**

License plates are made using 2 letters followed by 2 digits. How many plates can be made if repetition of letters and digits is allowed?
*July 12, 2011*

**Science**

CH4 + 20 2 --> CO2 + 2H2O How many liters of CO2 would be produced if 32 grams of CH4 are combined with oxygen??? How many grams of H2O would be produced when the 32 grams of CH4 are burned???
*April 1, 2011*

**math**

If someone's height is six feet and is enlarged to 16.8 inches, what is the scale factor?
*January 20, 2011*

**Math Finite**

A two card hand is dealt from a standard deck. What is the probability of drawing at least one face card?
*December 9, 2010*

**Math Finite**

How many years will it take for $12,000 to grow to $15,000 at 5.75% compounded monthly?
*December 8, 2010*

**Finite Math**

What interest rate, compounded weekly, would you need to be paid in order to grow an $8000 investment into $12,000 over a ten year period?
*December 7, 2010*

**Finite Math**

What interest rate, compounded monthly, would you need to be paid in order to grow a $2000 investment into $3500 over a five year period?
*December 7, 2010*

**interior decorating**

historically, who influencedthe style and trends of art, architecture, furniture and fashion? a. interior designers b. upper class c. architects d. artists
*December 7, 2010*

**math**

3x^2+11x+5=15?
*December 1, 2010*

**Math**

Flying against the wind, an airplane travels in hours. Flying with the wind, the same plane travels in hours. What is the rate of the plane in still air and what is the rate of the wind? Rate of the plane still in the air= ____km/h Rate of the wind= ____km/h
*April 14, 2010*

**Chemistry**

The Ka of hydrazoic acid (HN3) is 1.9 × 10-5 at 25°C. What is the pH of a 0.35-M aqueous solution of HN3?
*December 10, 2009*

**Chemistry**

Cyclopropane is converted to propene in a first-order process. The rate constant is 5.4 × 10-2 hr-1. If the initial concentration of cyclopropane is 0.150 M, what will its concentration be after 22.0 hours?
*December 10, 2009*

**Chemistry**

10g of Sodium Chloride are dissolved in 200ml of H2O. What is the mass percentage of solute in this solution?
*December 10, 2009*

**chemistry**

The body-centered cubic unit cell of a particular crystalline form of silver is 2.2887A on each side. Calculate the density of this form of silver?
*December 10, 2009*

**chemistry**

A buffer is made by adding 0.300 mol HC2H3O2 and 0.300 mol NaC2H3O2 to enough water to make 1.00 L of solution. The pH of the buffer is 4.74 . Calculate the pH of this solution after 0.020 mol of NaOH is added.
*December 10, 2009*

**physics**

Given: latent heat of fusion of water 3.33x10^5 J/kg. A 147 g cube of ice at 0 degress C is dropped into 1.3 kg of water that was originally at 79 degrees C. What is the final temperature of the water after the ice melts.
*December 8, 2009*

**syllable patterns**

how can you tell rather the first vowel in a word has a long or short vowel and how do you divide them
*October 13, 2009*

**9th grade history**

how did mccarthyism affect the lives and political thinkink of th e people in the u s
*September 29, 2009*

**Chemistry**

I have to list all of the ions of zinc, the thing is, the only ion I could find was Zn^2+. I've googled "ions of zinc" but this was the only one I could find. Are there any others? Thanks.
*April 22, 2009*

**Chemistry**

What is zinc's hardness (high, medium or low) I found the number on a hardness scale, (2) but I have no idea how the scale works, and if this would be considered high.
*April 22, 2009*

**HCA 270**

Sorry, I need help with the whole assignment, CheckPoint: Ratio Analysis. I have no idea what needs to be done to get the answers.
*November 7, 2008*

**HCA 270**

Has anyone taken Axia's HCA 270? Need help on Checkpoint: Ration Analysis.
*November 7, 2008*

**chemistry**

24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.
*April 19, 2008*

**chemistry**

24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.
*April 19, 2008*

**chemistry**

Find the temperature at which the reaction below is spontaneous given this data: Hfo of NH3(g) = - 46 kJ/mol, So of NH3(g) = 192.5 J/mol·K, So of N2(g) = 191.5 J/mol·K, So of H2(g) = 130.6 J/mol·K. N2(g) + 3H2(g) ßà 2NH3(g)
*April 19, 2008*

**chemistry**

Whats wrong with this answer? Ksp = [Pb2+]^3 [PO4]^2 = (2.3E-9)^3 (2/3 * 2.3E-9)^2 = 4/9 * (2.3E-9)^5
*April 19, 2008*

**chemistry**

Ionization equation for Pb3(PO4)2 is Pb3(PO4)2 --> Pb^2+ + 2PO4^3- Ksp = [Pb^2+][2PO4^3-] Ksp = [2.3 x 10-9 mol][4.6 x 10-9 mol] = 1.1 x 10-16 mol I am stuck
*April 19, 2008*

**chemistry**

If the concentration of Pb2+ is found to be 2.3 x 10-9 mol/L in a saturated solution of Pb3(PO4)2, what is the Ksp of Pb3(PO4)2 ?
*April 19, 2008*

**chemistry**

24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.
*April 19, 2008*

**Substitution Method in Algebra!HELP PLZ!**

knfnkasnga \
*November 5, 2006*

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