Thursday
April 17, 2014

Posts by sofia


Total # Posts: 78

science
Ethanol can also be manufactured from glucose, C6H12O6. C6H12O6 2CO2 + 2C2H5OH. A solution containing 18 kg of glucose makes only 0.92 kg of ethanol. Calculate the percentage yield of ethanol.

math
For the system of linear equations below, use graphing to determine in which quadrant the solution lies. x+2y=-2 -2x+y=14 Quadrant III Quadrant I Quadrant II Quadrant IV

math
A salmon has to swim 25 miles upstream. It seems 7 miles each day and drifts 5 miles at night. How many days does it take for the salmon to first reach the 25 mile mark?)

physics
A converging lens is 50cm away from the object. if the distance of the image from the object is 120cm and greater than four times the focal length of the lens, what is the focal length of the said lens?

chemistry
Calculate the pH for each of the following points in the titration of 50.0 mL of a 1.8 M H3PO3(aq) with 1.8 M KOH(aq). before KOH after addition of 25, 50,75,100 ml KOH

spanish
How to write 25,350

physics
A student sets up an Atwood machine with a frictionless rope, a 4.5-kg mass, and a 9.5-kg mass. What will be the acceleration of the masses? Use the gravitational acceleration found on Earth: g = 9.8 m/s2.

physics
Two masses connected by a rope over a pulley are released, producing the bar graphs below. It took 0.80 seconds for Mass A to reach the top and Mass B to reach the bottom. What was the acceleration of Mass A?

Integers (urgent)
I think I'm starting to figure it out....would it be any number above 1? x= 2 so.... 2+1-2= 1 etc.?

Integers (urgent)
For what integer values of x is x+1-2 positive?

decimals
how is 2.3-20=17.7 reasonable

Math
thankyou but hwo do you get 88cm?

Math
a cardbord gift-box has a surface area of 478cm2 and a volume of 570cm3. what are the length,width,and height of the carbox gift-box? I Need Help

Physics
Four point charges are at the corners of a square of side a as shown in the figure below. Determine the magnitude and direction of the resultant electric force on q, with ke, q, and a left in symbolic form. (B = 4q and C = 6.5q. Let the +x-axis be pointing to the right.) F = d...

Physics
Four point charges are at the corners of a square of side a as shown in the figure below. Determine the magnitude and direction of the resultant electric force on q, with ke, q, and a left in symbolic form. (B = 4q and C = 6.5q. Let the +x-axis be pointing to the right.) b|---...

math
a motorboat takes 5 hours to travel 45km downstream and then 18 km upstream on a river whose current flow of the rate of 3 km/hr. how fast can the boat travel in still water?

chemistry
what is the [OH-] in a solution that contains 0.225g of NaOH in 0.250 L of solution

Child development
What is an advantage of a cross-sectional design?

Child development
A correlation coefficient can range in value from A. +1.00 to -1.00 B. -1.00 to 0 C. 0 to +1.00 -100 to +100

chemistry
Show that a conventional x-ray generator is incapable of generating x-rays of wavelength as low as 10-11m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such x-rays.

chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−8 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in ...

math
. The ones digit is 0. . The hundreds and tens digits are consecutive numbers. . The digits in the thousands period have a sum of 15, with the hundred thousands digit being the greatest of the threes digits and the ten thousands digit being the least. . The amount in the milli...

Math
Ben has 8 1/2. Pizzas to serve. How many pizza 1/4 pizza sized serving does he have??

geometry
Each base of an isosceles triangle measures 42 degrees, 30'. The base is 14.6 meters long. a. Find the length of a leg of the triangle b. Find the altitude of the triangle c. What is the area of the triangle?

Math
Thank you so much!

Math
A telephone is anchored to the ground by a long cable called a guy wire, at a point 5 meters from the base of the pole, the wire makes an angle of 72.5 degrees with the horizontal. What is the length of the guy wire? HELP ASAP! I forgot how to compute for this (Pythagorean The...

math
Once you have isolated h, in this case it would look like -h, multiply the entire equation by -1 to get rid of the - sign on h. So, -1(-h=-13+7)

algebra
This is a problem where you just plug in the given value. So, the value they're asking for is 7n, which essentially the same as if they were to ask you, "What is seven times n?" So, therefore when you're given n=7565, you substitute 7565, the value of n into ...

Calculus
Consider the function f(x)=(5^x−1)/x. A) Fill in the table values for f(x): x= -0.1, -0.01, -0.001, -0.0001, 0.0001, 0.001, 0.01, 0.1 f(x)= 1.4866, 1.5866, 1.6081, 1.6093, 1.6096, 1.6107, 1.6225, 1.7462 B) Based on the table values, what would you expect the limit of f(x...

earth
Go to the online dictionary and type in "Geography." Or better yet, open one.

science
It all depends on the basis of question type... If it's mostly calculation: stoichiometry, physical properties, dilution, molarity, and everything in between, I would just practice like you would do your math homework, meaning do practice problems, and check your work. If ...

science
It all depends on the basis of question type... If it's mostly calculation: stoichiometry, physical properties, dilution, molarity, and everything in between, I would just practice like you would do your math homework, meaning do practice problems, and check your work. If ...

Math
Amaya has 24 inches of ribbon she can glue around the edge of a rectangular gift box lid. if she wants to use all the ribbon without any overlapping, what are the length and width of a gift box lid with the greatest area?

1 out of 2
Rewrite as: 3+9i-12+5i Add like terms: -9+14i is your answer.

chemistry
which of the following processes is more easily observable for light with a short wavelength? a. the photoelectric effect b. radio transmission c. diffraction d. interference

basic family health
discuss the nutrition and health promotion contribution to family health and development

HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
what is the word you use to tell how you get the macaroni and cheese into a bowl. My mom _______ the macaroni and cheese into my bowl to serve

6th grade math
what is the answer FOR MATH HOMEWORK

Science
your crrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaazzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Andrew

management
with example, ilustrate the function of management

history
Im writting an essay on the reformation and the renaissance can somebody proofread my essay

differential calculus
find the implicit function of x^3+3^y=3xy

psyc 106
Thank you so much.

psyc 106
A newspaper iditorialist argues that the use of dsm-iv diagnostic labels is destructively antidemocratic, because it enables an elite ccorps of mental health professionals to subtle control the values and life-styles of the rest of the society. i need reason to support this idea

Geometry
the side of a regular hexagon is twice the square root of its apothem. find the apothem and side length.

Relative velocity
A pet-store supply truck moves at 25.0 m/ north along a highway. Inside, a dog moves at 1.75 m/s at an angle of 35.0 degrees east of north. What is the velocity of the dog relative to the road?

science
Using a force of 20 Newton cody pushes a lawnmower 5m. how much work did cody do?

science
what is the reason why we can get Appendicittis even if we don't know what is the function of the appendix?

science
in the digstive system,what is the defenition or function of th Appendix?

1st grade
u should write 3 dogs wanted bones but one of the dog wasmean so only the 2 nice dogs got the bones

Math
when a drawing pin falls to the ground, the probability that it lands point up is 0.2. a. Find the probability that a pin does not lend point up. Two drawing pins fall one after the other.

Pre-Cal(Please help)
find the lengths of two other sides if the hypotenuse of a 45 degree -45 degree -90 degree triangle is 7. rationalize the denominator

social studies
i feel this is horrible!

math
how do you graph x>y -2 x+y>1 x<10

Chemistry
Thank you for the help : ) I just have 2 questions: Was the percent composition for K2SO4 that I calculated correct? Also, would I convert the 20 g of K2SO4 to moles, and then find the individual moles of each element in that compound? Thanks again for the help!

Chemistry
How do you determine the percent composition by mass of a 100 g K2SO4 solution containing a 20-g solute. What is the mole percent composition of the solute, assuming that the solution consists of 100 g water and 20 g of K2S04? For percent composition of K2S04, I got 44.9 % K, ...

Chemistry
Write the word and chemical equation for the following: Hexane undegoes complete combustion. I'm not sure at all how to do this one. I know that for compelte combustion, the products have to be H2O + O, but I don't know the formula for Hexane.

Algebra
unfortunately graphing it and factoring are pretty much your only choices

Algebra
There isnt truly an easy way but a pretty fast way is using a graphing calculator that can also be found online

Algebra 2! Pleaseeeee help
Directions: Using inverses simplify the expression. 5^log5x I know that the answer is x but i have no idea how...

French
Tres bonne les septs ici sont vrai

6th grade vocab
i doont know waht substancial and bravado mean can u pls help mr thxs

World Gepgraphy
What is cultural and political cleansing?

chemistry
A weather ballon with a 2 meter diameter at ambient temperature holds 525 grams of helium. what type of electric probe could be used to determine the pressure inside the ballon?

Algebra 2
thank you so much

Algebra 2
please help me i didnt understand this lesson could someone please explain?

Algebra 2
What is the absolute value of 6-8i ?

social studies
what is the production cost of an orange?

Very urgent please...
What is the real birthdate of Kalpana chawla ,the first indian,asian woman astronaut who died over texas skies on february 1 st 2003?

simplyfying expressions (trig)
you better use cot(x)/1 as sin/cos and go further.Since I can't understand ur mathematical expressions I can't give u the exact answer

simplyfying expressions (trig)
you better use cot(x)/1 as sin/cos and go further.Since I can't understand ur mathematical expressions I can't give u the exact answer

grammar
What is meant by passive voice? explain it with best examples.

algebra
The area each person will mow is 100000 sq.ft.

Math
The sale price for a house was $ 50,000. It was on sale for 5% off. Original Price?

science
As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? A) Sugar may precipitate out. B)...

science
This is wrong.

math
fraction for 2.089

Government
What are some of the reasons as to why the President is given almost unlimited military powers http://www.law.cornell.edu/constitution/constitution.articleii.html#section2 Article I, Section 2

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