Thursday
July 31, 2014

Posts by Patrick


Total # Posts: 266

Chemistry
Compound A reacts with element B (a halogen) to form compounds C and D as the only products. When 2.000 grams of B react with an excess of sodium metal 2.363 grams of the sodium halide are formed. Compound A is a volatile liquid at room temperature with a density of 0.8800g/ml...

college
HORIZONTAL LINE X | Y ___|___ -3|2.25 -2|2.25 -1|2.25 0|2.25

equation
what is the equation of calculating 5/90 lottery winning numbers if these numbers were selected for the first week 24-13-6-60-70

Calculus
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I dont know what to do with this...

Calculus Please Help
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I dont know what to do with this...

Calculus
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I dont know what to do with this...

chemistry
Determine the weight of Calcium Carbonate decomposed to produce 4 liters of Carbon Dioxide.

Chemistry
A student titrates 0.025 M KOH into 50.00 ml of a solution of unknown weak acid HA. Equivalence point is reached when 30.00 ml of the KOH has been added. After 15.00ml of the KOH has been added the pH of the mixture is 3.92. A. What is the concentration of HA ? B. What is Ka f...

Chemistry
A student titrates 0.025 M KOH into 50.00 ml of a solution of unknown weak acid HA. Equivalence point is reached when 30.00 ml of the KOH has been added. After 15.00ml of the KOH has been added the pH of the mixture is 3.92. A. What is the concentration of HA ? B. What is Ka f...

Calculus
Find d^2x/dt^2 as a function of x if dx/dt=4xcosx.

5th grade math
5/6 x 24=

Chemistry
CaCO3(s) <--> CaO(s) + CO2 (g) A 5.9-gram sample of CaCO3 (molar mass = 100.) is placed in an evacuated 2.00L container and heated to 200^oC. Equilibrium is reached when 5.15% of the CaCO3 has decomposed. 1)Write the Kp expression for this reaction and calculate its valu...

Algebra
Factor the following trinomial: w^18 – 9w^9y^5 + 14y^10

Algebra
Can you write a binomial in standard form with a degree of 0? Can you write a binomial with a degree of 3? Explain.

Chemistry
A student finds that 1.00 g of a monoprotic acid, HA , requires 50.0 ml of 0.100 M KOH to neutralize it. What is the molar mass of the acid?

Chemistry
A student finds that 1.00 g of a monoprotic acid, HA , requires 50.0 ml of 0.100 M KOH to neutralize it. What is the molar mass of the acid?

History
thats okay...i got the answer from some other hw website....thnx!(for nothing)

History
could you please just give me the answer in paragraph form

History
in one paragraph describe how the Monroe Doctrine has shaped the recent foreign policy decisions made by the U.S.

Algebra
5 to 6 miles / day

algebra
Width = w Length = w + 3 w(w+3)= 108sf I just plugged #'s into "w" until I found the one that fit. w = 9ft L = w+3 = 12ft

Chemistry
Answer the following question A(g) <--> B (g) + C(g) Kp = 2.00 Assume you placed 1.0 mole each of 'A' , 'B' , and 'C' in a container. Without actually doing the calculations explain how you would determine whether or not the system is at equilibri...

Chemistry
Answer the following question A(g) <--> B g) + C(g) Kp = 2.00 Assume you placed 1.0 mole each of 'A' , 'B' , and 'C' in a container. Without actually doing the calculations explain how you would determine whether or not the system is at equilibriu...

8th grade math
Answer to Jade: The bottom of the Trapezoid =x, the top = (1/3x), the sides then = (1/3x + 4"). So the equation looks like this: x + 1/3x + (1/3x + 4) + (1/3x +4)=56 Solve for X: 2x + 8 = 56 then x=24 Plug your # for x back into the dim. for each side and you get: Bottom ...

maths
the region in the first quadrant bound by the graphs y=(x*x*x)/3 and y=2x is revolved about the y-axis. find the volume of the resulting solid.

maths
determine the co-ordinate of the poin of intersection of the curves y=x*x and y*y=8x. sketch the two curves and find the area enclosed by the two curves.

Linear Programming
Tab 1: Linear Program: 50 points Consider the Linear Program: Max 2A + 3B s.t. 1A + 2B <= 6 5A + 3B <= 15 A, B >= 0 Use the Solver function of MS Excel to determine the optimal solution for this problem. What is the value of the objective function?

Chemistry
Explain the following observation in terms of the collision theory, restricting each to about 25 words. NO(g) + O3(g)--> NO2(g) + O2(g) (a) An increase in temperature increases the reaction rate. (b) Compressing the gases into a smaller volume increases the reaction rate. (...

Chemistry-DrBob222
A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting solution freezes at &#...

Chemistry
See bottom Patrick A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting sol...

Chemistry
In number 2.Is the delta Tf = to -2.84? I came up with 180 but confused with how -2.84 is delta Tf

Chemistry
A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting solution freezes at &#...

Chemistry
A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting solution freezes at &#...

Chemistry
The molecular formula of a compound containg only carbon and hydrogen is to be determined. When a sample of the compound is burned on oxygen gas, 7.2 grams of water and 7.2 liters of carbon dioxide gas are produced(measured at STP). When 0.600grams of the compound are dissolve...

Chemistry
Can't view the sight can u help me work it out

Chemistry
How many grams of nitrogen monoxide gas can be produced from 80.0 ml of 4.00 M HNO3 and excess Cu? 3Cu(s)+ 8Hno3(aq)-> 3Cu(NO3)2(aq)+4H2O(/)+2NO(g)

Chemistry
Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic acid...

Chemistry
Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic aci...

Chemistry
Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic acid...

algebra
4. Write an equation for the line through the points (2, -6) and (-1, -4).

Chemistry
Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the precipitate. Care...

algebra
P(1, 3) and R(5, 5) are the endpoints of a diagonal of the rectangle PQRS. Which sides of the rectangle are parallel to the x-axis? To the y-axis? What is the perimeter of the rectangle?

Chemistry
Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the precipitate. Car...

chemistry
Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the precipitate. Care...

Chemistry
When 50.0 g of iron(3)nitrate, FE(NO3)3, is dissolved in water , the number of nitrate ions present in the solution is

social studies
What does this quote mean? “Why should the Indian be expected to plant corn, fence lands, build houses, or do anything but get food from day to day, when experience has taught him that the product of his labor will be seized by the white man to-morrow? The most industriou...

economics
What were greenbacks?

Physics
Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is ...

Physics
i got the same answers you got but they are being read a sincorrect in my assignment.

Physics
The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m. 2) What is the wavelength of the wave? 3)What is the frequency of the wave?

Chemistry
During the combustion of 5.00 g of octane, C8H18, 239.5 kcal is released. a) What is the sign of (delta)H for this reaction? b) How much energy is released by the combustion of 1.00 mol of C8H18

physical chemistry
For the process CH4(g) = C(s) + 2H2(g) A reaction is started in a rigid vessel at 1000 K with 1 mole of methane and 1 mole of hydrogen gas at 10 bar. Use table C.3 from your text to determine how many grams of carbon should be formed after the reaction has reached equilibrium.

calculus
Find the derivative of y=t^2(5t-8)^4.

math
Calculate the lower quartile (QL) in the following data set: (8, 6, 13, 8, 3, 15, 12, 5).

Chemistry
Ok I will try Kelvin. Thank you

Chemistry
I attempted using the Clausius-Clapeyron Equation and I am not getting anywhere

Chemistry
The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1 degrees Celsius and 100.0 torr at -6.3 degrees Celsius. What is delta Hvap of chloroform?

Statistics
Is the water on your airline flight safe to drink? It is not feasible to analyze the water on every flight, so sampling is necessary. In August and September 2004 the EPA found bacterial contamination in water samples from the lavatories and gallery water taps on 20 of 158 ran...

chemistry
d,Atomic mass= fraction of the isotope X mass of the isotope.

chemistry
d,Atomic mass= fraction of the isotope X mass of the isotope.

Statistics
Calculate each binomial probability: a. Fewer than 4 successes in 12 trials with a 10 percent chance of success. b. At least 3 successes in 7 trials with a 40 percent chance of success. c. At most 9 successes in 14 trials with a 60 percent chance of success. d. More than 10 su...

college
Many organizational situations involve an audience that consists of a group of people. Which is an approach to analyzing this type of audience?

chemistry
Tums is added to 30.0 of 0.400m of HCL , how many grams of CO2gas are produced?

Physics
a ball is thrown vertically upward from the ground with the velocity of 30m/s. a) how long will it take to rise to its highest poitn? b) how high does the ball rise? c) how long after projection will the ball have a velocity of 10m/s? d) what is the total time of flight?

Physics
U=0,t=T,

math
square root 4y=10

Vector
2. Determine the Cartesian equation of the plane passing through the point P(2, -1,2) and containing the line r = (2, -1, 4) + f(0, 3, -5).

Bikini Bottom
huh? you are? What am I then?

math
How can fishermen save gas?

Vector
The points U(4,-1,2), V(-1,-1,-1) and W(-4,2,4) dermine a triangle in R^3 a) Determine the parametric equations for thr three lines containing the 3 sides of the triangle

psychology
all of the following are true of gestalt therapy except

Politics iran
Thank you and enjoy your trip :). I read your post about it.

Politics iran
Is this correct? The political values of Iran are influened by shari'a law? In other words Islamic law?

History (social oppression)
I'm having trouble understanding what social oppression is. Can it be applied to poor hating on other poors?

hmm...?
A clinic is a place where clients or patients receive diagnosis and treatment. So, a clinical psychiatrist is a psychiatrist involved in diagnosis and treatment of people with psychological challenges. Compare this to the theoretical psychologist and professor of psychology, w...

math
The unit rate for the first one is 98 yd/sec. 30 ounces for $3.48 is S8.62/oz. It is the best buy.

math
Which can be simplified to 13:4.

math
5/4*61/8 =305/32 =9.53125

Computers
Thanks, that was imformative.

Computers
This may seem irrelevant, but why is this site so oddly named?

4th grade math
9 miles long.

programming
java, write a program that prints out the letter X composed of asterisks (*) reply soon

math
How would I round the number 226,542,203 to the nearest million

chemistry
im confused about ionic substances. can someone give me a example of ionic substances?

chemistry
can someone explain a diatomic molecule, monatomic gas and what would happen if a metal atom bond with a nonmetal atom?

Algebra
Why is television called a communications medium?

social studies
do you know any websites that have any primary sources dealing with the roman empire, such as religion, war and conflict, culture, etc?

Calc
Thank you!

Calc
For y sec(x) = 3x tan(y), the direction above it says "Regard y as the independent variable and x as the dependent variable and use implicit differentiation to find dx/dy." I do now know if that makes any different and I believe I have 4 lives left. For the x3 + y3= ...

Calc
Thank you! For y sec(x) = 3x tan(y) I got dy/dx = (3 tan(y) - y tan(x)sec(x)) / (sec(x) - 3x sec²(y)) but it was still incorrect... I have no idea how to do y = arctan[(sqrt((1 + x)/(1 - x)))] because i never did this type of problem before, help please. here is another p...

Calc
Thank for replying =D. Unfortunately, I have been using implicit differentiation and I do not fully understand the logarithm. I am still getting an incorrect answer. Please show me an example on how to solve these problems. Thank you.

Calc
Can anyone help me find the derivative of these functions? y = x^2x y = x^-cos(x) y = ln(7x^2 + 5y^2) sqrt(3x+y)=2+x^2y^2 ysec(x) = 3xtan(y) y = arctan[(sqrt((1 + x)/(1 - x)))]

elementary
It must be an elementary question because I too have the same question on my homework. I was thinking the shape they are looking for is a trapezoid but still having problems getting to the .95 out of .30, 1.25 and 1.00

sociology
Conflict Perspective

english 7th grade
whatever memory you choose, how were you felling at exactly that time, right then and a stanza is like the seperate paragraphs in a poem like when it skips a couple lines those seperate paragraphs are stanzas hope i could help=)

social studies
christopher columbus was looking for a way to india and accidentily found america instead

Math
scientific notation

8th grade
ok my teacher just assigned me this wikid stupid worksheet with a riddle whom do you see at the bank if you need to borrow money?

math
14

biology
haha=)

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