Monday

March 2, 2015

March 2, 2015

Total # Posts: 97

**Chemistry**

Need Help! 1. Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g)+3H2(g)→2NH3(g)ammonia How many moles of N2 reacted if 0.65mole NH3 is produced? How many moles of NH3 are produced when 1.2moles H2 reacts? 2.In the acetylene torch, acetylene gas (C2H2) ...
*February 28, 2015*

**Chemistry**

nevermind, I figured it out!!! I'm getting better!! 3.80* mass of NaCl (58.4) =222g
*February 27, 2015*

**Chemistry**

I'm having a brain malfunction... how to calculate how many grams are in a mole of something? How many grams are in 3.80mol of sodium chloride (NaCl)?
*February 27, 2015*

**Chemistry**

Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g)+3H2(g)→2NH3(g)ammonia How many moles of N2 reacted if 0.65mole NH3 is produced? How many moles of NH3 are produced when 1.2moles H2 reacts?
*February 27, 2015*

**Chemistry**

Ok, I know how to balance chemical equations, however, I don't know how to tell if it is a S, L, aq, or g? How am I supposed to know this?? Mg(s)+AgNO3(aq)→Mg(NO3)2(aq)+Ag(s) Express your answer as a chemical equation. Identify all of the phases in your answer. ...
*February 27, 2015*

**Chemistry**

the calculator said it.. I didn't do anything but plug it in.. sorry, thanks for help
*February 27, 2015*

**Chemistry**

Dr. Bob222, Calculate the moles of C2H6 in 8.60×1023 molecules of C2H6. I did what you said, I got 8.60*10^23*(1mole/6.02*10^23) = 1.43*10^46??? This is not the answer.. am I doing something wrong?
*February 27, 2015*

**Chemistry**

I'm doing things on Mastering Chemistry dot com my homework.. I thought i was doing it right.. I was doing 9.9 * (6.02E23/1) It didn't like my significant figures.. It was wanting 6.0 * 10^24 as the answer, not 5.95 ugh... Thanks Dr. Bob.. Will probably be posting more...
*February 27, 2015*

**Chemistry**

UMM.. I keep coming up with the wrong answer? How do I calculate this? 1. Calculate the number of Li atoms in 9.9 moles of Li. Express your answer using two significant figures. 2. Calculate the number of CO2 molecules in 3.13×10−2 mole of CO2. 3.Calculate the ...
*February 27, 2015*

**Chemistry to DrBob222**

DrBob222 You are an amazing person! I have received more help from you the past two days that I have this whole semester from my instructor! You have an amazing gift of breaking things down to understand completely! Where are you from? Do you get paid for this somehow? look me...
*February 26, 2015*

**Chemistry**

Ok, Need some more help... This is what I have so far. 4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. molar mass:NH3=17 CO2=44 CO(NH2)2=60.1 a. (10 points) Write a ...
*February 26, 2015*

**Chemistry Drbob222**

Dr. Bob222 Please don't get frustrated with me, I'm really trying to figure this out... UGH!! I'm starting over again... Please advise... . Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were ...
*February 26, 2015*

**Chemistry**

Ok, Need some more help... This is what I have so far. 4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. molar mass:NH3=17 CO2=44 CO(NH2)2=60.1 a. (10 points) Write a ...
*February 26, 2015*

**Chemistry**

Percent yield is equal to the actual amount yield divided by the theoretical amount, so: 7.91 x 10^6 all divided by 8.94 x 10^6 = 88.5% yield Is this right???
*February 26, 2015*

**Chemistry**

3.54 x 10^7 g TiCl4 x (1 mol/189.68 g) x (1 mol Ti/1 mol TiCl4) x (47.88 g/1 mol) = 8.94 x 10^6 g Ti
*February 26, 2015*

**Chemistry**

Dr. Bob222 Please don't get frustrated with me, I'm really trying to figure this out... UGH!! I'm starting over again... Please advise... . Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were ...
*February 26, 2015*

**CHEMISTRY**

Someone please tell me if I'm doing this right... It's due tonight!! Dr. Bob222, Yesterday I posted a question and you answered me with how to calculate it.. Can you tell me if I'm doing this correctly?? Please! Consider the following chemical equation: TiCl4(g) + ...
*February 25, 2015*

**Chemisty**

Someone please tell me if I'm doing this right... It's due tonight!! Dr. Bob222, Yesterday I posted a question and you answered me with how to calculate it.. Can you tell me if I'm doing this correctly?? Please! Consider the following chemical equation: TiCl4(g) + ...
*February 25, 2015*

**Chemistry**

Dr. Bob222, Yesterday I posted a question and you answered me with how to calculate it.. Can you tell me if I'm doing this correctly?? Please! Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were reacted ...
*February 25, 2015*

**Chemistry**

Thanks DrBob222!!! You have helped me so much!!
*February 24, 2015*

**Chemistry **

Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were reacted completely and 7.91×106g of Ti(s) was obtained in the experiment. a. Calculate the theoretical yield of Ti(s). b.What is the actual yield of Ti(...
*February 24, 2015*

**statistics**

Determine the critical region and the critical values used to test the following null hypotheses: a. Ho: μ = 55 (≥), Ha: μ < 55, α = 0.02 b. Ho: μ = −86 (≥), Ha: μ < −86, α = 0.01 c. Ho: μ = 107, Ha: μ &#...
*February 20, 2015*

**algebra 2**

(ab)^2+2ab-2ab-4 (ab)^2-4
*September 30, 2014*

**Chemistry**

A 1N solution of NaOH is diluted 4/20 then rediluted 1:50. What is the final normality? How many grams of NaOH are present in 100ml of the final solution? I sort of understand the basic concept, but I don't really know how to do normality problems.
*May 20, 2014*

**Managerial Accounting**

If given the Selling price, the direct labor costs and other variable costs how do you determine the number of direct labor hours per unit?
*March 31, 2013*

**psychology**

Hi I have 2 questions i am searching for the proper answer on and it keep finding conflicting information> 1) Psychologist who believe in ___ are most likely to attempt to understand diversity in ethnic background as an influence on behavior: individual differences free ...
*November 26, 2012*

**maths**

find the base of an isocelus triangle base 12cm and its peremeter is32cm.find the area of the triangle
*May 21, 2012*

**science**

Use this reaction to answer the question: 2KClO3 -> 2KCl + 3O2. If I start with 65g KClO3, how many mol O2 will be formed? How many g O2? If I need to produce 299g KCl, how many mol of KClO3 do i need to start with? How many g KClO3?
*April 24, 2012*

**Math**

I tried 3x + 2x = 24 5x = 4.8 then multiply 3 • 4.8 = 15.4 and 2 • 4.8 = 9.6 which means 14 tvs & 10 radios would be left
*February 26, 2012*

**Math**

I forgot to mention there were 18 radios counted on Monday
*February 26, 2012*

**Math**

At the beginning of the week, an electronics store took count of how many tvs and radios there were in the stockroom. The manager found that there was a ratio of 3 tvs for every 2 radios. At the end of the week, the manager counted 24 boxes left in the stockroom. Using the ...
*February 26, 2012*

**phi 301**

"All dogs like bones; Sirius is a dog; therefore Sirius likes bones" may commit which fallacy?
*January 28, 2012*

**Physics**

Two identical rollers are mounted with their axes parallel, in a horizontal plane, a distance 2d = 40.4 cm apart. The two rollers are rotating inwardly at the top with the same angular speed. A long uniform board is laid across them in a direction perpendicular to their axes...
*January 5, 2012*

**Physics**

Two identical rollers are mounted with their axes parallel, in a horizontal plane, a distance 2d = 40.4 cm apart. The two rollers are rotating inwardly at the top with the same angular speed. A long uniform board is laid across them in a direction perpendicular to their axes. ...
*January 4, 2012*

**Physics**

Two identical rollers are mounted with their axes parallel, in a horizontal plane, a distance 2d = 40.4 cm apart. The two rollers are rotating inwardly at the top with the same angular speed. A long uniform board is laid across them in a direction perpendicular to their axes. ...
*January 4, 2012*

**Physics**

Two identical rollers are mounted with their axes parallel, in a horizontal plane, a distance 2d = 40.4 cm apart. The two rollers are rotating inwardly at the top with the same angular speed. A long uniform board is laid across them in a direction perpendicular to their axes. ...
*January 3, 2012*

**Physics**

Wouldn't the formula be T=2Pisqrt(I/mgd) where you solve for d, but my question iss do I add the two masses or am I over thinking this one
*January 3, 2012*

**Physics**

but wouldn't the mass and the Length of the rod come in play?
*January 3, 2012*

**Math**

How many different arrangements can be made with the letters from the word ORANGE?
*January 3, 2012*

**physics**

You are standing 7 feet from one speaker and 13 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is especially loud at your location, which of the following could be the wavelength of the sound? Choose all that apply. 1 ...
*December 8, 2011*

**physics**

A woman is sitting in a boat at anchor on a lake. Her boat bobs up and down once every 2.0·s. She notices that when the front of her 3.0·m long boat is at one wave crest, a second crest is at the middle of her boat, and a third is at the end. What is the ...
*December 8, 2011*

**Algebra 2**

Okay, thank you for your help! I will change the order of my answer.
*December 8, 2011*

**Algebra 2**

Write the expression as a complex number in standard form. 3-3i/4i I'm not sure about this problem, but I think the answer is -3/4i-3/4. Could anyone help me please?
*December 8, 2011*

**Math**

Okay, I wasn't sure if my answer was right, so thank you!
*December 8, 2011*

**brown**

parker wants to buy as many toys as she can with her 10$she can buy individule ponies for 2$ each or a set of 2 dolls for $3 what she she buy and why what do you need to find out what operations will you use why write a number sentence to show how you solved the problem label ...
*November 9, 2011*

**Chemistry**

You have a stock solution of 15.8 M NH3 . How many milliliters of this solution should you dilute to make 1350 mL of 0.300 M NH3
*September 13, 2011*

**ANT 101**

The process of cultural transmission from one generation to another is called:
*June 8, 2011*

**Math**

A watch cost $75.99. If the sales tax rate is 6.25%, what is the amount of sales tax? Please show work or the explanation you used!
*May 28, 2011*

**Chemistry (Electrons in Atoms)**

thanks
*May 22, 2011*

**Chemistry (Electrons in Atoms)**

True or False. 1)Electrons give off light as they drop to lower energy levels. 2)Electrons travel around the nucleus as waves. 3)A photon of low frequency light has more energy than a photon of high frequency light. 4)Orbitals with equal energy levels each contain one electron...
*May 22, 2011*

**algebra**

The length of a rectangle is 5 inches more than three times the width. The perimeter is 98 inches. Find the length and width
*May 2, 2011*

**physics**

Thanks. I'm not good with the right hand rules and the websites I'm finding aren't really helping.
*April 7, 2011*

**physics**

A wire carries a current north. Above the wire the magnetic field is directed _________. Is it east? You are looking at a coil carrying a current clockwise. The magnetic field at the center of the coil is directed _________. Is it right?
*April 7, 2011*

**math**

I will try. This will help me to start and gave me an idea. Thank you very much.
*January 25, 2011*

**math**

I am a third grader and have a homework of sketching and labeling all possible rectangles with perimeter of 30 cm and sides whose lengths are whole numbers. I am confuse, i need help please.
*January 25, 2011*

**College Math**

this isnt home work
*December 12, 2010*

**College Math**

For questions 1-2, apply the quadratic formula to find the roots of the given function, and then graph the function. 1. f(x) = x2 + 4 (6 points) g(x) = x2 - x – 12 For questions 3-4, factor the quadratic expression completely, and find the roots of the expression. 1. (3 ...
*December 12, 2010*

**college math**

apply the quadratic formula to find the roots of the given function, and then graph the function. f(x) = x2 - 4 g(x) = x2 - x - 12
*December 10, 2010*

**college math**

apply the quadratic formula to find the roots of the given function, and then graph the function. f(x) = x2 - 4 g(x) = x2 - x - 12
*December 10, 2010*

**market and sales**

the most common basis for market segmentation is demographics psychographics media usage cost analysis
*December 1, 2010*

**biology**

The sex ratio(number of females vs. males) of which of the following species might be most affected by global warming?A.Humans b.bees c.birds d.Turtles
*October 29, 2010*

**algebra**

-2(x-2)=2[x-4(x-2)+x]
*September 20, 2010*

**physics**

What is the average time interval between heartbeats? what is the average time between a hummingbird flaps its wing?
*September 14, 2010*

**geometry**

If an arc makes a central angle of 98 degrees is it a major or minor arc? Explain??
*June 10, 2010*

**chemistry**

What affect does salt have on ice water? Is there a term for it and a website that explains this?
*June 3, 2010*

**chemistry**

How are the formation of aqueous solutions of sodium chloride and sucrose similar?
*May 25, 2010*

**chemistry**

Thank you!
*April 26, 2010*

**chemistry**

Is this statement accurate? the boiling point of the distilled water was 99°C. After five minutes, the temperature still stayed the same; it remained constant. The liquid was becoming a gas. Phase change means there is an energy change. When the temperature of the water ...
*April 26, 2010*

**english**

the activity of scaling rocky cliffs
*March 14, 2010*

**Physics**

Joshua has a mass of 60kg and stands next to a wall ona frictionless skateboard. If he pushes the wall with a force of 30N, how hard does the wall push on him? Show that Joshua accelerates at .5 m/s2 away from the wall.
*February 7, 2010*

**algebra**

To get the x intercept you are going to want to isolate the x so that your problem equals x SO try dividing the 4 in 4x by itself to cancel it out. Since you have to do the same thing on both sides, divide the 4 by 4y and by 12 then you have x=y-3. Here is an example of how to...
*August 16, 2009*

**AED 204**

Hey I am mormon so i might be able to answer some of these for you from a mormon perspection if that is what you are asking: Pro or Con-prayer in school: not really touched on no strong church beliefs but there are no problems with this found in the church -creationism vs. ...
*August 16, 2009*

**english**

Does anyone have any ideas for an UNpersuasive essay? Instead of doing a normal essay, my class is doing an essay on anything that's crazy that people would normally not believe but if I use facts and other information, maybe they might believe me. I wanted to do maybe ...
*May 26, 2009*

**Algebra Reiny question**

The two values are s=3,-3 is this the right values?
*May 4, 2009*

**Algebra**

Find all the numbers for which the rational expression is undefined s^3-6x/ s^2-9 Thanks for the help
*May 4, 2009*

**History**

The "Critical Period" took place during the years when... w. the United States was governed by its 1st president x. George Washington served as the 1st president y. None of these answers are correct
*March 22, 2009*

**8th grade**

what is the difference between a compressional wave with a large amplitude and one with a small amplitude
*February 16, 2009*

**Geography**

The Bay of Fundy (or the Fundy Bay) is east of Maine.
*February 12, 2009*

**chemistry-0.1NHCl**

Hi, A bottle of concentrated Hydrochloric acid (HCl) has the following information stated on it: - Hydrochloric acid 37% 1L ~ 1190kg How do I prepare 0.1N HCl from this concentrated HCl?
*December 18, 2008*

**adj265**

describe the functions of organizational networks and specialized criminal justice database
*December 18, 2008*

**Issues**

I need help finding some major issues in new jersey! please help!
*November 3, 2008*

**Business Math**

Is it certain that you will get the principle back for every kind of investment?
*October 24, 2008*

**Business Math**

If your inital investment is $1000, and your rate of return is say 10%, did you make $100 or $1100 from your $1000?
*October 24, 2008*

**adj**

thanks but I got it under control now. I went back a re-read my text. now it is more clear. dah;) thank you:)
*October 21, 2008*

**adj**

Should intelligence operations be expanded? What is the intelligence dilemma facing United States law enforcement? Define and explain this dilemma. Address concerns about interagency cooperation related to the expansion of intelligence operations. o Should executive powers be ...
*October 21, 2008*

**Spelling/Analogy**

broom is to sweep as brush is to _______ ....... i need help with this one someone please answer me:)
*January 30, 2008*

**graphing polynomial functions**

How do i graph f(x)4x-x^3-x^5? How do I graph f(x)=x^5-4x^3-12x?
*October 15, 2007*

**reading (for ms. sue)**

Oh, ok. Thank you very much! I have one more question, what would the theme be?
*September 30, 2007*

**reading (for ms. sue)**

Would the antagonist be the Germans and the type of conflict man vs. man? Also, would the climax be when Sini and Rachel move in with the Oostervelds?
*September 30, 2007*

**reading**

Thanks. Would the antagonist be the Germansa and the type of conflict man vs. man? Also, would the climax be when Sini and Rachel move in with the Oostervelds?
*September 30, 2007*

**reading**

The author is Johanna Reiss
*September 30, 2007*

**reading**

What is the climax of the novel "The Upstairs Room"? Who is the antagonist of the story and what type of conflict does it have? Thank you.
*September 30, 2007*

**Microeconomics**

Two centuries ago there were more buffalo than cattle in the United States. Even though millions of cattle are killed for beef consumption each year, the catttle population continues to grow while the buffalo are virtually extinct. why? Explain in economic's term. Thanks
*August 31, 2007*

**math/statistics**

Could anyone explaint to me what role the Binomial Theory plays in statistics and probability? Using statistics, we can make statements about a population based on sample data. Probability helps us make those statements. The binomial theory can be used to determine ...
*March 6, 2007*

**proof by induction**

proof by mathmatical induction that the sum of the first n natural numbers is equal n(n+1)/2 It's true for n = 1. Assume that it is true for some n. Then the sum of the first n+1 natural integers can be obtained by dding the last number n+1 to n(n+1)/2. So, the assumption ...
*March 4, 2007*

**math-PLEASE HELP ME!**

# of words: 36 72 108 144 180 216 # of sec: 10 20 30 40 50 60 PLEASE HELP ME!!!!!!!
*January 30, 2007*

**math**

Find the percent of 42377 books i dont understand how to find percents You don't have enough information to calculate percent. If we had a total of 42,377 books and we sold some of them %books sold=(# books sold/42,377)x100 the question says: For 1980, find the percent of ...
*January 17, 2007*

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