Monday

January 16, 2017
Total # Posts: 728

**Chemistry 12**

given the reacting system: H2 (G) + I2(G) ---> 2HI(g) Keq= 64 Equal moles of H2, I2, and HI are placed in a 1.0 L container. Use calculations to determine the direction the reaction will proceed in order to reach equilibirum

*December 6, 2012*

**College Algebra**

Find a polynomial function f(x), with real coefficients, that has 1 and 3+2i as zeros, and such that f(-1)=2 (Multiply out and simplify your answer)

*November 13, 2012*

**calculus**

Find the dimensions of the rectangle with the largest area that is inscribed inside the parabola y = 16- x^2 and the x-axis

*November 1, 2012*

**Geometry**

The angle of elevation of a ladder leaning against a wall is 45°. If the distance from the base of the ladder to the wall is 15 feet, find the length of the ladder.

*October 22, 2012*

**Math**

in reality 95 = 95.0 so if you move the decimal place over 1 to the left you get 9.5 x 10^1 = 9.5 x (10) = 95 if you move it twice to the left you get .95 x 10^2 .95 x 10^2 = .95 x (10 x 10) = .95 x 100 = 95 So your answer would be .95 x 10^2 so scientific notation would just ...

*October 10, 2012*

**Math**

mean = add numbers together then divide by how many #s Median = middle of the numbers mode is the most frequent number

*October 10, 2012*

**Precalc/Trig**

Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)

*October 10, 2012*

**Math**

Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)

*October 10, 2012*

**Math**

Find all values of x, 0<x<(ƒÎ/2) for which (1/ã3)<cotx<(ã3)

*October 10, 2012*

**Math**

Find all values of x, 0<x<(ƒÎ/2) for which (1/ã3)<cotx<(ã3)

*October 10, 2012*

**Math**

Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)

*October 10, 2012*

**Math**

Find all values of x, 0<x<(ƒÎ/2) for which (1/ã3)<cotx<(ã3)

*October 10, 2012*

**Math**

80% times the price(x) .8x

*October 10, 2012*

**Science**

What is the final pressure of the gas relative to its initial pressure when there is an increase in Kelvin temperature of a cylinder of compressed gas by a factor of 2.7?

*October 9, 2012*

**Physical Science**

How much heat in joules is needed to raise the temperature of 5.5 L of water from 0 degrees Celsius to 78 degrees Celsius?

*October 9, 2012*

**math**

7.185 x 10^2 because you move the decimal 2 spots to the left

*October 6, 2012*

**PHYSICS**

WHEN THE BAROMETRIC PRESSURE IS 14.9LBS\IN AND THE PRESSURE GAGE ON A TIRE READS 34.6LBS\IN WHAT IS THE ABSOLUTE PRESSURE INSIDE THE TIRE

*October 1, 2012*

**Physic**

A ball is thrown upward. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s^2 and maximum height is 7.2 m,. Neglect air resistance. Answer in units of m/s

*October 1, 2012*

**trig**

(a) sketch an angle A in standard position whose terminal ray passses through the point (1,-4) (b) Find the exact value of the six trigonometric functions of A, (c) Let B be the reference angle of A. Find a point on the terminal rsy of B in standard position and add B to your ...

*September 15, 2012*

**trig**

find the reference angle of -20000 and express the six trigonometric functions of -20000 in terms of the six trigonometric functions of its reference angle.

*September 15, 2012*

**trig**

my question is find all angles of theta and 2pi whose reference angle is alpha = pi/12. Give exact answers. i cannot for the live of me find this

*September 15, 2012*

**Math**

Thank yo MS Sue. That is want I came up with but just wanted confirmation. thank you

*September 11, 2012*

**Math**

there are 7 people and you ordered 4 pizzas. Each person ate 3/8 of a pizza. How much pizza would you have left

*September 11, 2012*

**Physics**

Consider the following four possibilities for two point charges and choose the one(s) that do not change the magnitude of the electrostatic force that each charge exerts on the other: A. Double the magnitude of each charge and double the separation between them. B. Double the ...

*July 18, 2012*

**math**

find the area of a rectangle bounded by the axes and one of its corner is a point in the curve y=1/x.

*July 16, 2012*

**computers**

I'm confident that I found the right answer at Google, and I don't even have a copy of your book. What's in your book is not a magical world that can be divorced from the real world. Your book can't tell you something is true if there is no other way to CONFIRM...

*June 27, 2012*

**Computer Label Paper**

This is a trick question, since some of these paper choices don't even exist! Avery does not make ANY product with the number 6150 as part of the product name, according the the Avery company site. If Avery doesn't even offer the paper in answers (A), (B), (C), or (D...

*June 27, 2012*

**Logic**

Distribution: "We distinguish a distributed term (subject or predicate) from an undistributed term in this manner: A distributed term is one modified by 'All' or 'No.' When a term is modified by "some," it is undistributed," because it does ...

*June 27, 2012*

**English**

This sentence above is one terrible example of English. There should be a semicolon after "playground" instead of a colon. I hope you read a lot of books and newspapers, so that you won't have to learn proper English grammar entirely from books like this one.

*June 26, 2012*

**U.S. GOVERNMENT**

You can answer all of the above questions by googling the qestions' key words in the questions. And you'll learn a lot by doing so. If you don't understand the vocabulary (terms) used in the questions, you might have trouble. So, you might have to look up the word...

*June 26, 2012*

**English Language**

You could make a list the reasons why you don't like to be a class monitor. But, you would have to think about the experience and write the list.

*June 26, 2012*

**History**

When you are given a multiple choice question, you have to look at each possible answer to determine why it might be wrong. You have to look at each of the possibilities and find a logical reason to eliminate them until you have eliminated all but one answer. When only one ...

*June 25, 2012*

**READING**

Your confusion probably results from not understanding the phrase "suited to." In this case, "suited to the night" means "benefits from the night." Compare this to people (like house painters, dressmakers and jewelers) who benefit from working in ...

*June 24, 2012*

**Public Speaking**

The question is, who is the president's audience? Since the President's audience is the public (everything he says will become public), therefore this is public speaking. Everything the President says in his speech will be reported in the newspapers and his speech will...

*June 24, 2012*

**Australian Studies**

"great obesity epidemic" is in quotation marks, so just Google it, in quotation marks, and see who used this expression and why. Once you've read a newspaper article or two that includes this expression, you'll have all of the information you need to answer ...

*June 24, 2012*

**HEALTH**

Is this proposition true? For it to be true, BOTH parts have to be true. Is it true that "anything lawful is ethical"? Is it true that "anything ethical is therefore always legal." Because the words "always" is used, in the second part, and always...

*June 24, 2012*

**science**

Are we talking about an automobile or a train car? The answer would depend on variables like the height of car and the location of it's "center of gravity." Also, I assume you mean, 'How fast can the car go without tipping over?' Whether the car is on ...

*June 20, 2012*

**abnornal psych**

Here is a list of criteria that the American Psychiatric Association says it will use to determine what new diagnoses might appear in the new DSM. After reading the half page of criteria, you can try and decide for yourself whether it seems like "suicide" would/...

*June 18, 2012*

**French**

The terrible thing about textbooks is that it's not enough to be able to read and understand the text. You ALSO have to be able to read and understand the question about the text. If you cannot understand the question that is asked, it doesn't matter that you DO ...

*June 11, 2012*

**Chemistry**

How many moles of Xe gas are there in a container of Xe with a volume of 1.5L, and a pressure of 1.25 atm, and a temperature of 150C?

*May 13, 2012*

**Chemistry**

A container with a volume of 19.6 L that has temperature of 37C and a pressure of 0.900 atm has its temperature lowered to 0.00C and its pressure raised to 1.90 atm. What will the new volume be? Assume that the number of moles is constant.

*May 13, 2012*

**Writing**

You have a lot of facts here about the singing governor. If you think about why each even occurred and try to explain, then you'll write a better paper. For example, you say that his career began when he was signed to Decca Records. But, if you think about what you've ...

*May 6, 2012*

**Life orientation**

Drug addiction

*April 28, 2012*

**life orientation**

Water polution couse many illnes like malaria

*April 25, 2012*

**geometry**

Chapter one Quiz 3 to the heart tenth. cone S. Find the surface i 12 Chapter 12 Quiz 4

*April 11, 2012*

**Math**

$500 was deposited into an account at the first of the year. Interest earned was 5%. An additional $15 was deposited each week. How much was in the account at the end of the year?

*March 7, 2012*

**Math**

$500 was deposited in January @ 5% interest. $15 per week deposited all year long. How much money was in the account at the end of the year?

*March 7, 2012*

**calculus**

graph 2.25h+5m>23

*February 13, 2012*

**calculus**

Give a possible formula for the illustrated function using a vertical shift of an exponential function. The two points marked on the graph are A=(−172) and B=(10). The red horizontal line is given by y=−3, and is a horizontal asymptote of the function y=?

*February 3, 2012*

**Acid-base titration**

A weak acid HA (pKa = 5.00) was titrated with 1.00 M KOH. The acid solution had a volume of 100.0 mL and a molarity of 0.100 M. Find the pH at the following volumes of base added and make a graph of pH versus Vb: Vb = 0, 1, 5, 9, 9.9, 10, 10.1, and 12 mL.

*January 23, 2012*

**physics**

A puck on a horizontal, frictionless surface is attached to a string that wraps around a pole of finite radius, as shown in the figure . As the puck moves along the spiral path, does its speed increase, decrease, or stay the same?

*January 22, 2012*

**language arts**

are my feet are killing me is a alliteration, personification , or hyperbole?

*December 8, 2011*

**MATH**

11.5 minutes ;)

*November 30, 2011*

**physics**

A 19.2-kg box rests on a frictionless ramp with a 16.1° slope. The mover pulls on a rope attached to the box to pull it up the incline. If the rope makes an angle of 43.6° with the horizontal, what is the smallest force F the mover will have to exert to move the box up...

*October 2, 2011*

**Calculus**

Can someone explain to me how to do these? Given the following definite integral and n=4 answer the following questions. (Round your answers to six decimal places.) 1. Use the Trapezoidal Rule to approximate the definite integral. Answer: T4= 2. Use the Midpoint Rule to ...

*September 29, 2011*

**AP World History**

I took college levels classes AT A COLLEGE beginning when I was 13 years old and I accumulated over 40 credits toward college before I was 18 years old. Don't let anyone tell you you can't understand college materials. Before you search the text of your textbook for ...

*September 15, 2011*

**Physics**

A positive charge Q is on the y-axis at a distance a from the origin, and another positive charge q is on the x-axis at a distance b from the origin. A) For what values(s) of b is the x-component of the force on q a minimum? B) For what values(s) of b is the x-component of the...

*September 6, 2011*

**Physics**

A positive charge Q is on the y-axis at a distance a from the origin, and another positive charge q is on the x-axis at a distance b from the origin. A) For what values(s) of b is the x-component of the force on q a minimum? B) For what values(s) of b is the x-component of the...

*September 6, 2011*

**math**

1.8÷0.6

*August 23, 2011*

**math**

mathematical expression of: 1.) 75-5 2.) 14x(3+4) 3.) 3x(11+6) 4.) 1+(6+8) 5.) 20+5-80 6.) 4x2+5

*June 7, 2011*

**algebra 1 honors**

If r=5/3r+20/3, what is r? URGENT!!!!

*May 2, 2011*

**calculus**

Decide on what substitution to use, and then evaluate the given integral using a substitution. HINT [See Example 1.] (Round your decimal coefficients to four decimal places.) x/(2x^2-1)^0.4 dx

*May 2, 2011*

**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...

*April 17, 2011*

**college**

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

*April 3, 2011*

**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

*March 28, 2011*

**math**

jskvhaklhv hvla avugalivia the cakiucdnla

*March 23, 2011*

**Calculus**

Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...

*March 16, 2011*

**Calculus Please Help**

Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...

*March 15, 2011*

**Calculus**

Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...

*March 15, 2011*

**chemistry**

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

*March 12, 2011*

**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 ...

*March 10, 2011*

**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 ...

*March 10, 2011*

**Calculus**

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

*March 10, 2011*

**5th grade math**

5/6 x 24=

*March 8, 2011*

**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 ...

*March 3, 2011*

**Algebra**

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

*March 2, 2011*

**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.

*March 1, 2011*

**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?

*February 17, 2011*

**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?

*February 17, 2011*

**History**

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

*February 16, 2011*

**History**

could you please just give me the answer in paragraph form

*February 16, 2011*

**History**

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

*February 16, 2011*

**Algebra**

5 to 6 miles / day

*February 13, 2011*

**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

*February 13, 2011*

**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 ...

*February 11, 2011*

**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 ...

*February 11, 2011*

**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...

*February 9, 2011*

**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.

*February 7, 2011*

**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.

*February 7, 2011*

**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?

*January 20, 2011*

**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. (...

*January 20, 2011*

**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 &#...

*January 17, 2011*

**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 ...

*January 17, 2011*

**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

*January 16, 2011*

**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 &#...

*January 16, 2011*

**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 &#...

*January 16, 2011*

**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 ...

*January 9, 2011*

**Chemistry**

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

*December 14, 2010*

**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)

*December 14, 2010*

**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...

*December 13, 2010*