Tuesday

April 28, 2015

April 28, 2015

Total # Posts: 386

**chemistry**

1. What mass of lead chloride (PbCl2, MW= 278.2; Ksp= 1.8 x 10^-10) is dissolved in 250 mL of a saturated solution? 2. What mass lead chloride (PbCl2, MW=278.2; Ksp=1.8 x 10^-10) will dissolve in 150 mL of 0.050 M Pb(NO3)2?
*July 31, 2010*

**Grammar/Punctuations**

can you please tell me if this passage is correct? I am looking for 20 grammatical errors... what am I missing? Why are great numbers of students (student’s) choosing to pursue their college degrees using their home computers. (?) Benjamin Franklin said; “A penny ...
*July 10, 2010*

**Math**

Using factoring by grouping, how would you factor these out. 4t^2+3t-4t-3 3t^2-1t-3t+1
*April 26, 2010*

**math**

Using factoring by grouping, how would you factor these out. 4t^2+3t-4t-3 3t^2-1t-3t+1 Thank you
*April 26, 2010*

**English**

I'm doing a persuasive speech on why people should donate blood. What would a good title be?
*April 15, 2010*

**Biology**

The muscular layer of the heart (myocardium) contracts and relaxes to pump blood throughout the body. Oxygen poor blood from the body enters into the right atrium then flows into the right ventricle. The right ventricle pumps the blood to the lungs where gas exchange occurs. ...
*March 3, 2010*

**Chemistry**

for the molar mass of Na2Co3 i got: Na2= 22.98 (2)= 45.96 CO2=12.01 (3)=+36.03 equals: 81.99---->82
*March 1, 2010*

**physics**

A car accelerates uniformly from rest to a speed of 64.5 km/h (17.9 m/s) in 10 s. Find the distance the car travels during this time.
*February 16, 2010*

**Math-Ratios**

Write the ratio in each case: 6 in to 3ft I don't understand how the answer is 1/6. What do you do to get that? 50 hours to 3 days. I don't understand how the answer is 25/36. What do you do to get that? Thank you for your help. It is greatly appreciated.
*February 5, 2010*

**Physics**

A cube of oak with sides 15cm long floats upright in water with 10.5cm of its depth submerged. What is the density of the oak?
*January 6, 2010*

**social studies psychology**

Observing what a person does under carefully controlled circumstances is a main feature of?
*December 21, 2009*

**Chem**

How many potassium ions are present in 91.1g of potassium nitrate?
*December 3, 2009*

**Chem**

How many moles of excess reactant when 338mL of 0.226M sulfuric acid reacts with 0.493L of 0.211M sodium hydroxide to form water and aqueous sodium sulfate?
*December 3, 2009*

**Chem**

I know the specific heat for water is 4.184 and Al is 0.900. I dont know ice - our professor never went over that. Is it the same as water, or different?
*November 19, 2009*

**Chem**

Determine the final temp when 45.8g of aluminum at -5.2C is added to a mixture of 45.0g of ice at 0C and 2000g of water at 95C?
*November 19, 2009*

**Chem**

Hydrogen peroxide decomposes according to the following: H2O2--> H2O(l) + 1/2O2(g); deltaH = -98.2kJ Calculate the change in enthalpy, deltaH, when 1.00g of Hydrogen peroxide decomposes
*November 19, 2009*

**Chem**

Determine the mass of iron heated to 85 Celsius to add to 54.0g of ice to produce water at 12.5 Celsius. The speciic heat of iron is 0.045J/g C What steps do I take to solve this problem? Thanks
*November 19, 2009*

**Physics**

A 5 kg block is pushed up a 37 degree incline given an initial velocity of 2 m/s at the base of a frictionless plane. The maximum vertical displacement of the block is nearly what?
*October 25, 2009*

**English**

What are five identifiable characteristics of Imagism?
*October 11, 2009*

**Physics**

Solved out for H: (6371/sqrt(3/4)) - 6371 = H for other fractions just plug in where 3/4's is. Hope this helps!
*October 3, 2009*

**Chemistry**

yes
*September 16, 2009*

**Finance ( Need help )**

Sapp Trucking’s balance sheet shows a total of noncallable $45 million long-term debt with a coupon rate of 7.00% and a yield to maturity of 6.00%. This debt currently has a market value of $50 million. The balance sheet also shows that the company has 10 million shares ...
*August 3, 2009*

**Finance ( Please help)**

Warnock Inc is considering a project that has the following cash flow and WACC Data What is the projects NPV ?note THAT a projects NPV Can be negative in which case it will be rejected . WACC 10.00% year 0 1 2 3 Cash Flows -825 500 400 300 I get C but i am having doubts about ...
*July 29, 2009*

**Finance ( NEED HELP BAD)**

Masulis Inc is considering a project that has the following cash flow and WACC Data .what is the project discounted payback WACC 10% years 0 1 2 3 4 CASH FLOW -700 525 485 445 405
*July 29, 2009*

**Investing ( pease help)**

You have been assigned the task of using the corparate ,or free cash flow , model to estimate Petry's Corporation intrinsic value. the firm WACC is 10.00% , its end of year cash flow ( FCF)IS EXPECTED TO BE 90.0 MILLION, THE FCFs are expected to grow at a constant rate of ...
*July 27, 2009*

**Finance ( PLEASE HELP)**

You have been assigned the task of using the corparate ,or free cash flow , model to estimate Petry's Corporation intrinsic value. the firm WACC is 10.00% , its end of year cash flow ( FCF)IS EXPECTED TO BE 90.0 MILLION, THE FCFs are expected to grow at a constant rate of ...
*July 27, 2009*

**Investing ( pease help)**

You hold a diversified $ 100,000 portfolio consisting of 20 stocks with 5000 invested in each . The portfolio's beta is 1.12. You plan to sell a stock with b=0.90 and use the proceeds to buy a new stock with b=1.75. what will the portfolio new beta be ? PLEASE Help me i&#...
*July 24, 2009*

**Investing**

You hold a diversifield $ 100,000 portfolio consisting of 20 stocks with 5000 invested in each . The portfolio's beta is 1.12. You plan to sell a stock with b=0.90 and use the proceeds to buy a new stock with b=1.75. what will the portfolio new beta be ? PLEASE Help me so ...
*July 23, 2009*

**Finance**

Taggart Inc's stock has a 50% chance of producing a 21% return, a 30% chance of producing a 10% return, and a 20% chance of producing a -28% return.What is the firms expected rate of return? Please help
*July 23, 2009*

**investing**

Its saving 6,400 per yr
*July 21, 2009*

**investing**

you plan to go back to school for 4yrs . You plan to save 6,400/yr beginning immediately . 4 deposits are made in an account that pays 5.7% interest. How much will you have 4yrs from today
*July 21, 2009*

**Science**

combanation of two or more types of matter
*April 29, 2009*

**Math**

how do you find half of 2^6?
*February 28, 2009*

**algebra**

7x^-3/7^3x-1
*February 18, 2009*

**Chemistry**

i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there? Responses Chemistry - DrBob222, Monday, February 16, 2009 at 12:35am Just ignore the Cl^-. Co(H2O)6Cl3 ==> Co(H2O)6^+3 + 3Cl^- Then ...
*February 16, 2009*

**Chemistry**

i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there?
*February 15, 2009*

**Chemistry**

At 25°C, K = 0.090 for the following reaction:H2O(g) + Cl2O(g) 2 HOCl(g) Calculate the concentrations of all species at equilibrium for each of the following cases. (a) 1.2 g H2O and 1.6 g Cl2O are mixed in a 1.4 L flask. (b) 1.2 mol pure HOCl is placed in a 1.9 L flask
*February 15, 2009*

**9th grade**

A 5-kg rock is lifted 2 meters in 5 seconds. How much work is done? How much power is done?
*February 12, 2009*

**heritage report**

I am going to write information about my personal heritage if I write about three different ideas they will be special accomplishments of different family members ,a special family tradition and a traditional recipe. i want the two pages of information to be decorated and look...
*January 31, 2009*

**government**

If the president chose to appoint a federal judge that the Congress found unsuitable, which would have the final word?
*November 13, 2008*

**Science (8th grade)**

in terms of chemical bonds anfd electrons, what kinds of changes occur between atoms when substances undergo chemical reactions?
*October 22, 2008*

**7th grade science**

blank a group of atoms held together by the energy of chemical bonds
*October 5, 2008*

**algebra**

How do you solve this problem? 1 - 3/4(v+2) = -5
*October 1, 2008*

**6th grade Math**

Your brother pulls his sled up a hill. Each minute he moves forward 20 feet, but he also slides backward 3 feet. Describe how you can determine the time he needs to pull his sled 130 feet forward.
*September 25, 2008*

**Critical Thinking**

dds
*August 7, 2008*

**Keyboarding**

What is the main difference between block letter style and modified block letter style?
*June 24, 2008*

**chemistry**

Draw three repeating units of the condensation polymer made from ethanedioic acid and ethanediol.
*May 11, 2008*

**chemistry**

What about glycosidic bonds?
*May 10, 2008*

**chemistry**

Thanks
*May 10, 2008*

**chemistry**

What type of linkage joins the nucleotides within a single DNA strand Is it a hydrogen bond?
*May 10, 2008*

**chemistry**

What are the monomers of aspartame? I can only get one, which is methan ol, but what are the others?
*May 10, 2008*

**History**

Scary...I have the same assignment and I'm just as lost...and yeah my teacher sucks too...hmmm...scary...quite scary...you don't have Billiam, do you? (if you do you'll get that...)
*May 5, 2008*

**Chemistry**

I've got the first part (0.0005), but I don't understand how to do the next 2 parts, where I covert mols ferrous ammonium sulfate to mols of the product. Thanks
*April 15, 2008*

**Chemistry**

The first step of the synthesis is described by the reaction below. When 2.000 g of Fe(NH4)2(SO4)2 6H2O is mixed with 13 mL of 1.0 M H2C2O4, the theoretical yield of FeC2O42H2O is ______ grams. Fe(NH4)2(SO4)26H2O(s) + H2C2O4(aq)--> FeC2O42H2O(s) + (NH4)2SO4(aq) + H2SO4(aq...
*April 15, 2008*

**chemistry**

Sorry, it is <-->, there was an error when I typed up the problem. Thank you for your help!
*April 9, 2008*

**chemistry**

The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> and <-- FeSCN2+(aq) A. A heterogeneous equilibrium exists because of the charged ions. B. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. C. The ...
*April 9, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

u can shove it up my vag baby
*April 6, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

me
*April 6, 2008*

**chemistry**

(A) A student performed the freezing point depression experiment according to directions but mistakenly recorded the mass of lauric acid as 8.300 g instead of 8.003 g. The calculated molar mass of the unknown acid will be ___________ than the true value, because the mass of ...
*April 4, 2008*

**english**

That there our veins might through Thy Person bleed/To quench those flames, that else would on us feed "What Love Is This" "The Ebb and Flow" "Meditations"
*February 29, 2008*

**english**

Portrays the alternation between faith and doubt?
*February 29, 2008*

**english**

How many Puritans died during the crossing of the Atlantic?
*February 29, 2008*

**english**

Wanted to create a gracious way of living and stressed refinement and the development of courtesy?
*February 29, 2008*

**MATH**

An entry level position pays 8 dollars per hour. A 4% raise is given at the end of each year of employment. What would the pay be after 3 years? My mom tried to help me and she got 8.998912 which we figured would round to 9 dollars. When i reworked the problem i got 8.96. Does...
*February 2, 2008*

**math(EASY BUT CHECKING)**

for a spinner numbered one to ten, all outcomes are equally likely. What is the probability of getting a factor of six? I thought it might be 4/10 or 2/5 because i think a factor is a number that can go into another one. I often confuse those with multiples so if someone knows...
*February 2, 2008*

**political science**

The Constitution specifies a 3/4 majority for which process?
*January 21, 2008*

**Math Quantitive Reasoning**

The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $12. What percentage of her phone bills are between $14 and $86?
*December 2, 2007*

**german**

Woher kommt Siegfried? how do i answer this?????
*November 14, 2007*

**Alegbra1**

How would i solve this problem?(It's on a MathCounts worksheet and i dont understand it) the ^ mean exponents -(1^2008)+(-1)^2007
*October 25, 2007*

**spanish**

Thank you so much but this still doesnt answer my question.
*October 8, 2007*

**spanish**

How did Europeans transform life in argentina and Chile? Please help me. Thank you.
*October 8, 2007*

**Rate of change**

I have some questions that I would like you to check please. Thanxs! Find the slope then describe what it means in terms of the rate of change of the dependent variable per unit change in the independent variable. 1. The linear function f(x)=4.6x+37 represents the percentage ...
*September 1, 2007*

**Math**

A train is 1 mile long and is going through a tunnel a mile long, if the train is going 15 miles per hour, how long will it take 4 the train to get completley through the tunnel?
*August 27, 2007*

**math**

The only part of the height equation that we have not discussed is the constant. You have probably noticed that the constant is always equal to the initial height of the ball (80 m in our previous exercises). Now, let’s have you develop a height equation. A ball is thrown...
*July 18, 2007*

**English**

In the book Lord of the Flies what is the irony of Samneric's behavior? www.sparknotes.com/lit This is a good place to look up information about a variety of books normally used in classrooms across the country and abroad. You might check out the characters in the ...
*July 15, 2007*

**English**

In Lord of the Flies, why is Percival unable to remember his name and address? Also here: http://www.novelguide.com/novellist.asp?sortby=Title&char=L and here: http://en.wikipedia.org/wiki/Lord_of_the_flies
*July 15, 2007*

**math**

i sorda know how to do this problem, but i am gonna ask anyway. ADDITIONAL INFO: consider a regular deck of cards without the jokers. Cards are replaced after each draw. Find the probability of each of the following. QUESTION: P(pair of red kings) wow thats a hard one i have ...
*March 22, 2007*

**Pre-Algebra**

problem: Dena borrowed $7500 to buy a used car. The credit union charged 9%(percent it looks kind of funny) simple intrest per year. She paid $2025 in interest. For what period of time did she borrow the money. It would be 3 years. Get how much they charge her per year which ...
*February 5, 2007*

**Math**

What is a unit rate? what is the prime factorazation for 945? idk how to do this 10= 15= GCF= i need help with my prime factorization homework what is a prime factorazation i meed held on my homework how do u determine if the numbers are prime or composite
*December 12, 2006*

**earth//space science**

what is an inverse relationship? explain the relationship between the density of a planet and the distance the planet is from the sun "what is an inverse relationship? explain the relationship between the density of a planet and the distance the planet is from the sun.&...
*November 16, 2006*

**math**

If you swim 2 miles in 40 minutes, what is the unit rate? If you use distance=rate*time, then rate =distance/time So 2mi/40min or simplifying to 1 mi per 20min Can you convert this to mile per hour?
*October 14, 2006*

**science**

Correct ways for performing laboratory procedures. 10 letter word
*September 6, 2006*

**science**

What is unit size or amount agreed on? 8 letter word How about "standard"? thank-you
*September 6, 2006*

**Science**

What is the science of measurement 9 letter word. Thanks, Lindsey Hi there, I was able to find the answer online by typing "science of measurement" in quotes into the google search engine. I hope that helps. Thanks I had done that but without the quotetion marks. ...
*September 4, 2006*

**math**

Something times something equals 97 Are you supposed to factor 97 as the product of integers? We need a little more info to help you. If you are expecting integer results, wait no more as 97 is a prime number. Therefore, no two integers have a product of 97. If you are not ...
*August 29, 2006*

**math**

Something plus something equals 97 You have many combinations of whole numbers that answers your question. 1 + 96 2 + 95 3 + 94 etc, etc. or -- x + y = 97 There are 48 pairs of numbers that sum to 97. Do you have another constraint that would identify the unique answer you ...
*August 29, 2006*