Posts by Laura

Total # Posts: 1,270

Chemistry
The question is with a lab that I have already done. Here are my numbers moles of malachite in 1g 221.12 moles of CuO produced 141.57 ratio of moles of CuO produced per moles of malachite decomposed 79.55 Use the mole ratio of CuO produced per mole of malachite to write a ...

Chemistry
I need to write a balanced equation for this problem and am having difficulty doing so. The question is this: use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO2 is also a product of ...

Chemistry
I need to write a balanced equation for this problem and am having difficulty doing so. The question is this: use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO2 is also a product of ...

Chemistry
Why do carboxylic acids generally have higher melting and boiling points than alcohols, ketones, and aldehydes of comparable mass?

Chemistry
Explain why alcohols of lower molecular weight are generally soluble in water but those of higher molecular weights are generally not.

college math
How do you prove: If a/b, then a/bc So far I have: Since a/b, then b=ac where c is an integer. Now where do i go?

Chemistry
What are amine salts?

Chemistry
An alcohol has an OH functionally in it. Do you expect it to be a base? Why, or why not?

Economics
How does the government participates in a mixed economy? Based on principles of the free market, allowing some government intervention. Is there anything else i can say?

college math
how do you integrate (cos^2 x)^4

college math
thnx

college math
is the integral of 1/x^2, 2x ln of the absolute value of x^2?

college math
thank you. i understand now.

college math
how do you integrate ln(x^2+1)dx?

math
yes, I got this answer, as well THANKS

math
how do you integrate (3x+1)/(x-1)x^2 dx?

math/ cal
thank you for your answer, but this example problem is not the same as mine. the example problem is (sin (x))^2, in other words the whole quantity is squared. mine is just sin of x^2. any suggestions here?

math/ cal
how do you integrate sin (x^2) dx?

Chemistry
Name an isomer of pentane (that is not cyclic) and write down its structure.

adult education
I am currently studying for the cbest exam in all three areas, math, reading and writing. Does anyone have any current information that would help better prepare for these tests.

Chemistry
What is the three dimensional structure of methane? Why?

Chemistry
What is the difference between hydration and hydrogenation reactions?

CHemistry
Why do cis and trans isomeric compounds exhibit different properties?

Chemistry
Why is the benzene molecule represented as " a flat cyclohexane with a ring inside?"

Chemistry
Why is benzene much less reactive than 1, 3, 5-cyclohexatriene?

Chemistry
Are these compounds organic, if not what are they? Kmno4 CH3OH C6H6 PdC12 CH3CO2H

Chemistry
What is the formula of 1,3-butadiene?

Chemistry
Name one structural and one chemical difference between acetylene and ethylene. Give reasons.

Chemistry
Name an isomer of pentane (that is not cyclic) and write down its structure.

Chemistry
What is the three dimensional structure of methane? Why?

Chemistry
What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones?

Economics
1. The main disadvantage of using shells as money, instead of coins, would be a lack of: a. durability b. portability c. uniformity d. divisibility I think its B. portability?

Economics
Thank you, for your feedback. I just read another part of my economic book and B is definitely the answer.

Economics
1. Products that would be used in calculating GDP include: a. Toys manufactured in China at a factory owned by a U.S. company b. cars manufactured in Tennessee at a factory owned by a Japanese automobile company c. plastic manufactured in Kentucky and sold to toy manufacturers...

CHemistry
In a clean 250mL volumetric flask, 125mL of a 6.0 M hydrochloride acid was added. This was then diluted with more water to reach the 250mL mark. What is the molarity of the acid at this time?

Chemistry
calculate the final concentration if 4.0 L of 1.5 M NaC1 and 2.0 L of 3.0 M NaC1 are mixed.

AP CHEM
How did you get part B?!

science
What kind of materials block sound.

Physics - Waves
0.78352941

Physics - Waves
0.141525

Socialogy and cultural diversity
Are Irish Americans considered a subordinate group in American History? I need to do a paper on a subordinate group and I was thinking of using Irish Americans.

Chemistry
91.7g of HCl solution was added to the calorimeter and brought to a constant temperature. Then 0.5278g of MgO was added and the temp rose from 25.65C to 32.60C and held steady. Then 0.0185g of Mg was added and the temp again rose from 30.35C to 32.20C Calculate the Cp for the ...

chem
If a cube with edges of 1.000 cm weighs 25.68 g, what would the mass of a cube of the same material with sides 2.63 cm in length be?

Chemistry
91.7g of HCL solution was added to the calorimeter and brought to a constant temp. Then 0.5278g of MgO was added and the Temp rose from 25.65C to 32.60C and held steady. Then 0.0185g of Mg was added and the temp again rose from 30.35C to 32.20C. Calculate the Cp for the ...

spanish help
1. soy 2.somos 3.son 4.estoy 5.fue 6.es , era ?? 7.es 8.esta

spnaish HELP
1. Is wrong. Its... Quiero ir a Colorado para Navidad 2. Has comprado algo para la cena ? 3. Este celular es solo para emergencias. 4. Ella siempre viaja en autobús.

grammar
Thanks Ms.Sue and Writeacher...website was a big help. My son now has a better understanding subject/predicate! very happy :)

grammar
what is a predicate? My son's assignment is to circle the action verb and underline the predicate. I've tried to explain what a predicate is, but he still doesn't understand.

science
Appendix

home economics
how does the increase in use of ethanol in the United state impact other place in the world?

Calculus
The curve f(x)=-x^4+2x^2+x has a tangent at the point (1,2). Is this line tangent to the curve at another point and, if so where?

math need help with this
If on the first of January a savings account has a balance of $3200 what amount will be in this account after three years if the bank gives 6% per year interest compounded quarterly?Assume that there are no deposits or withdrawals of money during these three years.

algebra with pizzazz
What is it called when a sea bird lands on a channel marker?

math
A dealer offers a computer software program whose list price is $500 at a 19% discount. She will give an extra 3% discount if paid in cash. What is the selling price if payment is made in cash? If 500=81%, _____=78% (this comes from subtracting 19% from 100%, then subtracting ...

math
need help in 1996, the civilian labor force of the united states included 127 million people, and 5% were unemployed. how many people in the cilvilian labor force were unemployed?

math
the two parallel bases of a trapezoid are 5inches and 6 inches long. the altitude of the trapezoid is 4inches. what is the area of the trapeziod? i got 15

science
~Which type of plate is thicker? continental or oceanic [i know that oceanic plates are denser but that doesn't exactly mean its thicker.] ~Which type of plate, continental or oceanic, is older?? [on this question i have no clue] Thanks for any help! <3

chemistry
THANX I AM IN 5TH GRADE AND THIS WAS 4 A PROJECT

chemistry
I NEED A MODEL OF THE ELEMENTS OF CHLORINE

Precalculus with applications
Determine whether the system of inequalities is infeasible, has alternate optimal solutions, or is unbounded for the function f(x,y)=2x+y

english
what does the word daff remind you off?

MATH
please help execute the indicated multiplications. (x-2)(x^2+2x+4)

MATH
combine like terms is this correct (5x^2+6x+8)+(6x^3 +2x^2-4x) = 6x^3+7x^2+2x+8

math
please help me out here the problem is combining like terms. 4x^3-3x^3+9x+2x I got 1x^3+11x but when i asked a friend they said it would be x^3+11x could u help me out please. also could you tell me if this probem is correct as well (10x^3+6x^2+4x) -(8x^3+2x^2-3x)= 18x^3+4x^2+...

US history
we are supposed to create an advertisement for a revolutionarynewspaper- around the constitutional convention time.. what products do you think they would sell at that time??? thank you!

Math
oh and this is grade nine math

Math
it says the knights banquet hall uses the equation 25n-c+1250=0 determine the cost for a hall rental the legions banguet hall usues the equation 30n+995-c=0 to determine the cost for thier hall rental express each equation in slope y-intercept form- c=mn+b identify the fixeed ...

college algebra
Identify the units on x in each of the following equations. (a) x= yz (both y and z are measured in feet) (b) x=3y^2 (y is measured in inches) (c)x = t^3 (t is measured in seconds) (d) x 4F^2 d (both F and d are measured in meters) 4. In an exponential expression such as A = ...

Science- Chemistry
THANK YOU!

Science- Chemistry
What does NaHco3 + HCl produce?

math
75 150 divided by 2 equals 75

10th grade english
um how do u write an extended metaphor

science
THANK YOU SOOOOOOOO MUCH!

science
Why are there more warm currents than cold currents in oceans?

Algebra
Word Problem: Jack mows the lawn in 4 hours, mary mows the lawn in 5 hours. how long will it take them if they mowed the lawn together? I have a hard time figuring out which formula to use to solve a problem in a word problem can anyone help and tell me how to set up the ...

Algebra; check please?
A television has a diagonal of 10 inches and a width of 8 inches. what is it's height? i think the answer is nine inches, am I correct? If I am not how do I find the answer?

Algebra
Thank you!

Algebra
Can someone help me figure out what formula I am to use for this word problem? I am having a hard time. If the sides of a square are lengthened by 7cm the area of the square becomes 121cm^2. What is the length of a side of the orgional square?

Comprehensive Grammar
i am not good at this i the reason i chose these answers was they sound right. i don't know the reason behind it.

Comprehensive Grammar
these are the answers i just need help on why they are the answers. Subject-verb agreement 1a. Did you know a famous animal-rights activist has criticized horseracing because of the dangers involved? Subject-verb agreement 2b. Peer editing academic papers requires critical-...

Comprehensive Grammar
i know the answers i just need to know why they are right.

Comprehensive Grammar
Read the following sentences, and focus on the grammar area specified in the left column. Then, complete Appendix H by selecting the correct sentence (a or b) for each number and providing an explanation of why you made that choice. Subject-verb agreement 1a. Did you know a ...

BEHAVIORAL SCIENCE
Think about the last time you attended a lecture or were in a classroom. Applying the information processing model, why did some things make it into your short-term memory and some things into your long-term memory? How can knowing this process increase your learning potential...

Algebra
So I should find the vertex?

Algebra
I am supposed to find the ticket sales of a concert using this formula: N(x)= -0.3x^2 + 6x + 15 X represtents the number of days since the concert was first announced. I need to find out when daily ticket sales will peak and how many tickets will be sold on that day. How do i ...

math
876-235= the smaller number.

Financial Management
1. The financial markets allocate capital to corporations by a)reflecting expectations of the market participants in the prices of the corporation's securities. b)requiring higher returns from companies with lower risk than their competitors c)rewarding companies with ...

science
You have a plastic tray with cold water in it and then you have three cups holding it up and one cup has hot water in it. You put dye in the cold water on top of the hot water. Why does the dye move away from the hot water?

Financial Management
1. Total asset turnover indicates the firm's a)liquidity. b)debt position. c)ability to use its assets to generate sales. d)profitability. 2. Some analysts believe that the term structure of interest rates is determined by the behavior of various types of financial ...

algebra 1 8th grade
I cannot solve for x in the following expression, -4 + 2x + 2 = x + 1 + x. Am i missing something?

Algebra
How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution?

math
How do you solve a problem that asks you to find the 500th term? A beach ball has six vertical sections colored white, orange, yellow, blue, red, and green. If you spin the ball so that 500 colors go by and the first color is white, what is the 500th color? How do I go about ...

5th grade
if you are talking about a vowel (a,e,i,o or u), a line over a vowel means the vowel is a long sounding vowel.

INTRODUCTION TO BEHAVIORAL SCIENCE
A psychologist is planning to conduct a study that would examine pathological liars and the quality of their romantic relationships. You have been asked to provide the psychologist with a recommendation for which research method should be used to gather data on the ...

Pre-algebra 7th NEED HELP
This is a question my teacher gave me and there are no parenthesis or whatever you might think it needs. It's 20 divided by 4 minus 5 plus 12. I think the answer is -12, but I'm not sure. PLEASE HELP!!!

Pre-Algebra 7th
What does 20 divided by 4 minus 5 plus 12 equal? I'm trying to understand the order of operation. I think the answer might be -12. Is this correct?

English
Oedipus... What eyewitness to the murder of Laius still exists? Scene 2 P

history
Just google roger williams I found several sites that gave good info.

algebra
oooooooooooh ok thank you.

algebra
What in the world does this mean? To estimate animal populations, biologists count the total number of animals in a small section of a habitat. The total population of animals is directly proportional to the size of the habitat (in acres) polled. a. Write an equation using ...

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