Total # Posts: 573

precalc
f(x)=Log1/3^(9x)find the domain and range.

chemistry
consider the following reaction: 2C2H6(g)+7O2 (g)-->4CO2(g)+6H2O (g) delta H = -3120kJ If 3.00g of ethane are burned, how many kJ of heat are produced?

chemistry
consider the following reaction: C3H8 (g)+ 5O2 (g)--> 3CO2 (g)+ 4H20 (g) Delta H = -2440kJ The heat of formation of CO2 is -390 kJ/mol and the heat of formation of H2O is -240 kJ/mol. What is the heat of formation of propane?

chemistry
the following reaction is carried out in a bomb calorimeter: 4NH3 (g) +5O2 (g)-->4NO (g)+6H2O (g) The calorimeter constant is 45.0kJ/K. when 34.0g of NH3 are reacted in the calorimeter, the temp rises by 10 degrees C. What is the change in energy, delta E, for the rxn?"

Math
Time's 5

Spanish
when you are talking in past tense. for example: you went swimming yesterday.

Chemistry-Help!!
If I have 10mL of 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?

Chemistry-Confused!!
You have 10mL of a 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?

MATH HELP!!
what is the unit rate for 67.92 for 4gal

Chemistry-urgent!
Yes, but would that give me 63 mL or 250 mL. That's where I get confused.

Chemistry-urgent!
What volume of 2.5% (w/v) KOH can be prepared from 125 mL of a 5.0% KOH solution?

An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis? A-albumin, inside B-starch ...

Chemistry
I'm having trouble with molarity. What is the molarity of a KCl solution made by diluting 75.0 mL of a 0.200 M solution to a final volume of 100.0 mL?

Math
Find the present value of the annuity necessary to fund the withdrawal of \$600 per month for 10 years, if the annuity earns 2% per year and if there is to be \$10,000 to be left in the annuity at the end of the 10 years. (Assume end-of-period withdrawal and compounding at the ...

Math
Find the present value of the annuity necessary to fund the withdrawal of \$600 per month for 10 years, if the annuity earns 2% per year and if there is to be \$10,000 to be left in the annuity at the end of the 10 years. (Assume end-of-period withdrawal and compounding at the ...

social studies
new england colonies 2. what? what happend to the coloonists at roanoke? what happend to the colony at sagadaco? 5. where? where was roanke? where was sagadahoc? where was james feild?

social studies
What was the name of William Lloyd Garrison's anti-slavery newspaper.

math
what is the perimater of a 90 degree angle multiply by 2 a 17 multiply that answer by 7 add 90 and subtract 23.

writing
My teacher said,write 10 sentences 5 for each Paragraph..she said here is your topic. If you would write a speech what would you write it about. Now im not writing a speech im writing i i would write a speech what would i write it on im havinc alot of trouble help please....???

math
if you used 2 hundreds, 18 tens, and 4 ones to model a number. what number did you model?

Chemistry
A 112 mL solution of 0.351 M HCl is added to 52.0 mL of 0.161 M HCl. What is the new concentration of HCl?

Chemistry
what is the concentration of Cl- after adding 250 mL of 0.10 M AlCl3 to 250 mL of 0.30 M Ca(NO3)2

I need a website that will tell me everything about The Independence Debate:Consequences for the Colonies?

Chemistry
4.90g Ba

English
How do you fix this pronoun agreement. The first theme that the author demonstrates is to not let people with a disability feel abnormal, but for them to use the abilities that they have to help them build their self-confidence.

Quick ?
I doing a sample lesson plan for my english class. I want to show a movie that realtes to the book that were reading and the movie is 106 minutes. I teach each class for 50 minutes a day. How many days would it take to finish the movie and how long is 106 minutes?

Art
Why is important for children to draw pictures of things that scare them (otherwise what does the child learn from this?

math
If you had a fraction strip folded into tenths what fractional lengths could yu measure with the strip?

math
The tread life of a particular tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2000 miles. What is the probability that a randomly selected tire of this brand will last longer than 58,000 miles? A.0.7266...

alegebra
i don't know any i need help asap!

What number I sent 1,000,000 greater than 337,676

science
A ball is dropped from a cliff and has an acceleration of 9.8 m/s2. How long will it take the ball to reach a speed of 24.5 m/s?

Math
Mike can mow a lawn in 3 hours. Paul can mow the same lawn in 2 hours. How long would it take both of them working together to mow the lawn? The answer is suppose to be 20/9. This is what I did and I get 9/20. What am i doing wrong? 1.4x+1/5x=1 which gives u 9/20. I'm so ...

Math
Solve each inequality algebraically. |2x-1|-2<3 I don't understand how the answer is -2<x<3

Math
A student scored 65, 80, 74 on the first three tests during the term. What does the student need to score on the fourth test to ensure and an average score that is above 75?

math
How do I start off this equation? Using correct mathematical notation and symbols, express the following in set builder notation: Z = {4, 5, 6, 7, 8, 9, 10, 11}

math
Given these sets: A = {1, 2, 3, 4} B = {3, 4, 5, 6, 7} C = {3, 5, 7, 9} List the elements of this set C ¿ (A u B) Do I list the numbers in C that is not in A and B?

math
Sealing a Gym Floor A gymnasium floor has an area of 2400 square yards. Each gallon of floor sealant covers an area of 350 square feet. How many gallons of sealant are needed to cover the gymnasium floor? should the equation be set as 2400 sq. yards = 7200 sq. feet 7200 sq ft...

college mathematics
how do I set up an equation for this? Lisa has \$215 saved. She plans to save \$125 every month so that she can have enough money to buy a new sofa. The sofa costs \$1498, including tax. How many months will she need to save to be able to buy the sofa?

college mathematics
1-1=0 0-2=-2 -2-3=-5 -5-4=-9 -9-5=-14 (would it be this)

college mathematics
Use inductive reasoning to predict the next three numbers in the sequence. 1, 0, -2, -5, -9,

algebra
Use inductive reasoning to predict the next complete line in the pattern. 10 × 12 = 11 × 13 - 23 12 × 14 = 13 × 15 - 27 14 × 16 = 15 × 17 - 31

Science
sososososososososososos

algebra1
The sears tower in Chicago is 1,454 feet high. suppose you take a sheet of paper and fold it once in half, than fold it in half again,and keep folding it over and over again. How many times would you have to fold it to create a piece of paper that is higher than the sears tower?

social studies
What three countries border Egypt?

Math
in a subdivison, 67% of the homes have detatched garages, 32% have a patio & 13% have both. What is the probability that a house has a patio if u know that it has a detached garage?

physics
im trying to find the speed of a tyrannosaurus rex by alexanders froude number. sp= (square root of)leg length x gravity/ froude number sp=(square root of) 3.5 x 9.8 / 11 i get 1.76 but a t rex cant run/ walk at 1.76 m/s or km/h nothing fits

Math
Ya it says How many ounces of each solution should be mixed to prepare the desired perscription? Why is there a 50 in parentheses next to the .54? So once I solve for x what do I do next?

Math
A pharmacist is to prepare a 50 fluid ounce solution that contains 54% glucose. The pharmacy has a 30% solution and a 90% solution on hand. How many ounces of each solution should be mixed to prepare the desired perscription?

Math
x/2-3=x/5+1 The answer is suppose to be 40/3... I don't know how do this

English
why is it important to know the story elements when reading a text and writing a narrative

English
How do text and word help me understand the meaning of words while I read and write?

Math
How do you solve this equation? The answer is suppose to be -0.7 Thanx for you help. Greatly appreciated -5x\9=7/18

Science
yes it is B

linear system problems
the base of an isosceles triangle is one third the lenght of each congruent sides the perimeter of the triangle is 84 cm how long is the base?

French help part 2
I have a few more if anyone could review them I would be so grateful!!!!! 11.Quand il finira ce cours, il ___D ira____ au Japon. A. va B. est allé C. irait D. ira E. allait 12.Hier, à 9 heures du soir, elle __A a fini______ son devoir. A. a fini B. finit C. ...

French help
Thank you E.G. and Kanon!!!

French help
Are these answers correct? Thank you!! 1. Elle voit ses amis au cinéma. Elle ___la___ voit 2. Nous parlons souvent à nos professeurs tous les jours. Nous __les____ parlons tous les jours. 3.Martine va en Chine, Elle _le_____ va pour étudier la culture ...

geometry
if 4, 6, and 10 and 14, 21, and x are the lengths of the corresponding sides of two similar triangles, what is the value of x?

math
greatest common factor of 12 numbers less than 40 list each pair

english
h t t p s : / /w w w. c o n n e x u s .c o m /c o n t e / re nd er.a sp x?i d D o c u m e n t = 7 7 5 8 7 5 & I d C o u r s e = 7 3 0 8

French question
Nous ________ cours vers 9 heures a. voulons b. faisons c. allons d. Commençons I can't decide between B and D. Thank you!

Thank you!!!

I need help with these two French 101 questions please. Thank you!! Je connais bien Mireille. Je _________ connais depuis 30 ans a. le b. la c. y.....I think this is correct d. lui Marie est une nouvelle étudiante. Hélène lui parle. Choisissez la forme ...

poetry
i don't care

Social Studies
What are the four main natural resources in the united states? and what does silt do to help farmland?

English
Can you please just check the grammar in this for me. Thank you Nella Larsen theme is to teach the readers that sometimes it is best to deny ones racial heritage rather than to accept it or identify with it. When it comes to certain situations when race is an issue, the ending...

English
What do you mean by one life lesson is strongly related to others?

English
Why do some authors have more than one theme to their novel? What is the significance of that?

Chemistry 101
Thank you Dr Bob!!!!

Chemistry 101
Are these correct? 1. A sample of gases contains three gases at the following pressures: 1.2 atm N2, 3.2 atm O2, and 0.56 atm Xe. What is the total pressure in the container? a. 5.0atm b. 1.4atm c. 2.2atm d. 1.0atm e. 1.7atm I am pretty sure it is A. Is that correct? 2. The ...

English
what are the importance of taboos and why are they used in modern literature. Are taboos considered a characterisc of modernism

English
Why are taboos used by authors in their writing?

French help
Thank you very much Samantha and Kanon!!!

French help
Hi. There is a word missing in this sentence. Would it be pour? Thank you! Le week-end, j’aime aller à la plage ______ faire bronzer et nager mais seulement quand il fait chaud.

English
Can you please tell me what this means?I don't understand it at all. Thank you for your help. I hate this type of literature. Modernism is that if everything is based on perception, then history is false; therefore the society emerges from that history is also false. The ...

French help part 2
Thank you for the help. I don't understand the question for #1 either.

French help part 2
Hi. I am trying for an A in my French class and every point counts. I would appreciate any feedback on my answers. Thank you!! Complétez les phrases suivantes avec une forme d’un de ces verbes: croire, voir, recevoir. 1. Jean et Julien __________ Jean et Julien- I...

French help part 1
Hello!!!! I am so close to an A in French. I would be so grateful if someone could review this and tell me if I am correct. Thank you!!!!! Complétez chaque phrase avec la forme appropriée d’un de ces verbes. Dire, lire, écrire. 1. Elle n’aime pas...

French 101 help Part 2
Hi. I would really appreciate it is someone could review my answers for these questions.I am horrible with accents and always lose points. Are those correct as well? Thank you in advance!!! Complétez avec la forme correcte de savoir ou connaitre 6) __________ -vous qu&#...

French 101 help
Hi. Would someone please review and tell me if these are correct? Thank you!!!! Remplacez le nom dans les citations avec un pronom d'objet direct ou indirect selon des cas. 1) Est-ce que vous “me” regardez? Oui, nous . . . A:Oui, nous te regardons. 2) Les mauvais...

it wants me to add an independent or dependent clause........they chose which clause to use, ex. when the student artist showed his work to the teacher......I'm to add an independant clause......I don't know what they're asking.....

math
B: 3

French 101
Is vécu correct? Voici Christophe. Il ________ (vivre) à Paris pendant deux ans. Thank you!!

French help
I have to fill in the blanks of this sentence with 5 of the 8 words provided but I am totally lost. I would appreciate any help. ___(1)___ soir, nous ___(2)___ rencontré des amis au restaurant. Nous ___(3)___ avons ___(4)___ le jour précédent. Après...

Then...Does your experimental empirical formula (answer to #5) agree with the known empirical formula (answer to #6) of zinc chloride? List and describe some sources of error that may have affected your results The only factor of error I can think of is that the ions weren'...

The next question is Determine the actual empirical formula of zinc chloride, based on the ionic charges of zinc and chloride ions, using your rules for ionic nomenclature. Because Zn has +2 ions and Cl has -1 the actual empirical formula is ZnCl2

Thank you for your reply. The Zn in grams 1.80= .028 moles Zn and Cl in grams 0.90= .025 moles Cl The question was: What is the EXPERIMENTAL empirical formula of zinc chloride? Determine the simplest whole number ratio of moles of zinc used, to moles of chlorine reacted in the...

Chemistry
Is this correct? What is the experimental empirical formula of zinc chloride? Determine the simplest whole number ratio of moles of zinc used, to moles of chlorine reacted in the zinc chloride that was produced..028 moles of Zinc .025 moles of Cl .025 moles of Cl is smaller ....

external and internal character traits
is external and internal traits about the person?

French
trente trente-cinq quarante

how do u do arrays and an expanded algorithm

Science
What is the Newtons Laws

Algebra
I know you are but what am i hi emily

algebra
number 14 is 181

algebra
Maggies' brother is 3 years younger than twice her age. The sum of their ages 24. How old is Maggie

Science
what variables can affect the sprouting of a bean seed?

How do you do a ball dichotomy?

Social Studies
How has the conflict (war) changed Iraq?

Humanities
What are the three ingredients for language splitting?

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