Monday

January 23, 2017
Total # Posts: 2,629

**Chemistry Urgent**

A calorimeter contains 32.0mL of water at 13.0∘C . When 2.30g of X (a substance with a molar mass of 82.0g/mol is added, it dissolves via the reaction X(s)+H2O(l)¨X(aq) and the temperature of the solution increases to 30.0∘C . Calculate the enthalpy ...

*March 11, 2014*

**chemistry**

95.0mLmL of H2O\rm H_2O is initially at room temperature (22.0∘C\rm{} ^{\circ}C). A chilled steel rod at 2.0∘C\rm ^{\circ}C is placed in the water. If the final temperature of the system is 21.3∘C^{\circ}C, what is the mass of the steel bar? Specific heat of ...

*March 11, 2014*

**Science Help PLEASE!!**

ty

*March 11, 2014*

**Chemistry**

Consider the following problem: Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3 kJ 2. NO(g) + 1/2 Cl2(g) ? NOCl(g) ?H= -38.6 kJ As you determine the ¥ÄHrxn value for the target equation above, what must be done to step ...

*March 9, 2014*

**chemistry**

Calculate the DHof for the following reaction under standard state conditions: 2 Ag2S(s) + 2 H2O(l) ---> 4 Ag(s) + 2 H2S(g) + O2(g) Given the following information: Ag2S(s) ÄHof = -32.6 kJ/mol H2O(l) Ä Hof = -285.83 kJ/mol H2S(g) ÄHof = -20.6 kJ/mol

*March 9, 2014*

**chemistry**

Consider the following problem: Target: 2NOCl (g) ¡æ N2 (g) + O2 (g) + Cl2 (g) ¥ÄHrxn= ? Steps: 1. ¨ö N2(g) + ¨ö O2(g) ¡æ NO(g) ¥ÄH= 90.3 kJ 2. NO(g) + ¨ö Cl2(g) ¡æ NOCl(g) ¥Ä H= -38.6 kJ...

*March 9, 2014*

**chemistry**

Calculate the DHof for the following reaction under standard state conditions: 2 Ag2S(s) + 2 H2O(l) ---> 4 Ag(s) + 2 H2S(g) + O2(g) Given the following information: Ag2S(s) ÄHof = -32.6 kJ/mol H2O(l) Ä Hof = -285.83 kJ/mol H2S(g) ÄHof = -20.6 kJ/mol

*March 9, 2014*

**math**

can you help me With my homework.

*March 8, 2014*

**prealgebra**

Caitlin's cylindrical jar holds 525 cubic inches. If the height of the jar is 7 inches what is the approximate diameter?

*March 6, 2014*

**Math**

How do you find the derivative of ln(xy)=x+y

*March 3, 2014*

**Geometry/Trig**

A plane is flying and show an air speed of 130 mi/h. However, there is a 20 mi/hr crosswind. What is the resulting speed of the plane.

*March 3, 2014*

**trigonomentry**

Ada travels from A on a bearing of 60˚ to station B on a distance of 15km.she then leaves to station C 10km away from B due east of station

*March 2, 2014*

**maths**

now there is a pool, the height of the pool is 48cm and the width is 2m, now 3 quarters are full, what will be the final answer in litres?

*March 2, 2014*

**Chemistry**

How has crude oil changes the country (positive and negative points)

*March 1, 2014*

**Analytical Chemistry**

A - 1 B-3 C-2 D-4 E-5 F-6 G-7

*February 28, 2014*

**social studies**

Can someone help me with number 9?

*February 27, 2014*

**geometry**

Circle the following quadrilateral that does Not have at least one pair of consecutive sides congruent. (A) rhombus (B)kite(C)isosceles trapezoid(D) square Circle the following quadrilateral that may have exactly one pair of consecutive sides of congruent. (A)rhombus (B) kite(...

*February 26, 2014*

**Science help ms sue.**

Number 2 was B, and number 5 was A

*February 25, 2014*

**statistics**

Construct a 95% confidence interval for the population mean. 5. Airfare A random sample of airfare prices (in dollars) for a one-way ticket airfare between two cities MN. Key: 21|1=211 21 | 1 2 22 | 1 1 1 2 3 5 7 8 23 | 2 3 4 7 7 8 9 9 24 | 2 3 4 8 8 25 | 1 2 6 6 6 6 8 9

*February 23, 2014*

**statistics**

Construct a 95% confidence interval for the population mean. 5. Airfare A random sample of airfare prices (in dollars) for a one-way ticket airfare between two cities MN. Key: 21|1=211 21 | 1 2 22 | 1 1 1 2 3 5 7 8 23 | 2 3 4 7 7 8 9 9 24 | 2 3 4 8 8 25 | 1 2 6 6 6 6 8 9

*February 23, 2014*

**algebra**

NO Solution

*February 22, 2014*

**Physics**

Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 26.5 cm) 15.1 cm away from an object. Find the image distance. Answer in units of cm

*February 21, 2014*

**PLS HELP ME WITH ONE MATH QUESTION!!???**

I got 100% too. Thanks. I thought number 3 was 2.

*February 19, 2014*

**Social Studies**

Thanks so much for the answer Ms. Sue. Almost every single last answer you've ever given someone has been true, and I appreciate it so much!! I get 100% on almost every test because of you.

*February 10, 2014*

**Chemistry**

Thank you!

*February 10, 2014*

**Chemistry**

A 76.00-pound flask of mercury costs $151.50. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one pound of mercury? =$1.99 What is the price of one gram of mercury? =$...

*February 10, 2014*

**Chemistry**

A 76.00-pound flask of mercury costs $151.50. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one pound of mercury? =$1.99 What is the price of one gram of mercury? =$...

*February 10, 2014*

**Chemistry**

A 76.00-pound flask of mercury costs $151.50. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one pound of mercury? =$1.99 What is the price of one gram of mercury? =$...

*February 10, 2014*

**Math Urgent help please**

A lamppost casts a shadow of a man who is standing 15 feet away from the lamppost. The shadow is 5 feet long. The angle of elevation from the tip of the shadow to the lamp is 50. To the nearest foot, the lamppost is _____ feet tall. (Points : 2)

*February 10, 2014*

**math --- pls check my work!**

You must be extremely smart. I got a 100%, because of you. Thanks so much for your help. Keep up the good work, so that I can too!! xD

*February 3, 2014*

**SICK**

no matterfact I am sorry im not going to argue with teachers because that is very wrong.but I can give you all links to questions I posted through out the week with no answers??

*February 1, 2014*

**SICK**

ive been posting the same question for 2 days and you guys have been ignoring me no joke -_-

*February 1, 2014*

**Math**

Angie read 2 books in 5 days, and each book contained 340 pages. If Angie read the same number of pages each day, how many pages did she read per day? A.)75 B.)340 C.)680 D.)136

*February 1, 2014*

**social studies(CHECK ASNWERS)**

please check my answers and if there wrong maybe you could tell me the correct one.but thanks anyways. 1. How did the formation of the National Action Party change Mexican politics? A.It ended the one-party system. B.It consolidated power among a few key leaders. C.It ended ...

*January 31, 2014*

**socialstudies(CHECK ANSWERS)**

PLEASE CHECK MY ANSWERS please check my answers and if there wrong maybe you could tell me the correct one.but thanks anyways. 1. How did the formation of the National Action Party change Mexican politics? A.It ended the one-party system. B.It consolidated power among a few ...

*January 31, 2014*

**chemistry**

Need help balancing this chemical reaction equation Ca(NO3)2+2NaOH>Ca(OH)2+2NaNO3

*January 30, 2014*

**Calculus**

Find the critical numbers of the function. h(t) = t3/4 − 5t1/4

*January 28, 2014*

**Calculus**

A poster is to have an area of 160 in2 with 1 inch margins at the bottom and sides and a 7 inch margin at the top. What dimensions will give the largest printed area? (Give your answers correct to one decimal place.)

*January 28, 2014*

**Calculus**

Find the absolute maximum and absolute minimum values of f on the given interval. f(x) = (x2 - 1)3 [-1, 6]

*January 28, 2014*

**Calculus**

Find the absolute minimum and absolute maximum values of f on the interval below. f(x) = x4 - 8x2 + 6 [-3, 4]

*January 28, 2014*

**Calculus**

Find two numbers whose difference is 132 and whose product is a minimum.

*January 28, 2014*

**Calculus**

A box with a square base and open top must have a volume of 4,000 cm3. Find the dimensions of the box that minimize the amount of material used.

*January 28, 2014*

**Calculus**

A poster is to have an area of 160 in2 with 1 inch margins at the bottom and sides and a 7 inch margin at the top. What dimensions will give the largest printed area? (Give your answers correct to one decimal place.)

*January 28, 2014*

**Please help with Physics Quickly**

1. How are impulse and momentum related? (Points : 1) Impulse is the change in momentum of an object. Momentum is the change in impulse acting on an object. Impulse and momentum are always equal in magnitude. Impulse and momentum are the same thing. Question 2. 2. Which of ...

*January 27, 2014*

**Psychology**

Within each gene, elements of DNA are arranged in a particular order, forming a code that influences the synthesis of particular proteins. This code affects every aspect of the body, from its structure to the chemicals that keep it running. The above process describes:

*January 27, 2014*

**chemistry**

What is the concentration of a solution, in gsolute/100gsolvent, made using 2.29 g of KNO3 in 2.03 g of H2O?

*January 24, 2014*

**Social Studies**

The answer is A, lily

*January 23, 2014*

**History8**

the correct answer is d you guessed correct! Good job!!!

*January 16, 2014*

**literature**

Can someone help me in scansion of the poem "the poplar field" by William Cowper? need help to find base meter, scheme, stanza forms if any, and the metrical peculiarities such as end-stopped lines, run-on lines, elision, pause, feminine ending, masculine ending and ...

*January 15, 2014*

**Math**

the length of a rectangle is seven less than four times the width. Find the length if the area is 65 square units.

*January 11, 2014*

**SS**

Cowgirl is correct.^^ A A B D I got 100%

*December 30, 2013*

**physics**

A mass M of 7.00E-1 kg slides inside a hoop of radius R=1.30 m with negligible friction. When M is at the top, it has a speed of 5.47 m/s. Calculate the size of the force with which the M pushes on the hoop when M is at an angle of 39.0°.

*December 24, 2013*

**language arts**

#4. C

*December 18, 2013*

**language arts**

This the passage for #2 &3: I checked into a hotel called the Olympia, which is right on the main street and the only hotel in the town. After lunch I was hanging around the lobby, and I got to taking to the guy at the desk. I asked him if this wasn't the town where that ...

*December 18, 2013*

**help plz? 2 questions**

HA! Is that from connexus!

*December 17, 2013*

**Physics**

A stone is thrown vertically upward at a speed of 27.70 m/s at time t=0. A second stone is thrown upward with the same speed 2.140 seconds later. At what time are the two stones at the same height? At what height do the two stones pass each other? What is the downward speed of...

*December 17, 2013*

**Physics**

A stone is thrown vertically upward at a speed of 27.70 m/s at time t=0. A second stone is thrown upward with the same speed 2.140 seconds later. At what time are the two stones at the same height? At what height do the two stones pass each other? What is the downward speed of...

*December 17, 2013*

**English**

Well, in another answer "Ms. Sue", you seemed to think 1 was A and 2 was B.

*December 16, 2013*

**physics**

A stone is thrown vertically upward at a speed of 27.70 m/s at time t=0. A second stone is thrown upward with the same speed 2.140 seconds later. At what time are the two stones at the same height? At what height do the two stones pass each other? What is the downward speed of...

*December 15, 2013*

**science**

How does biodiversity increase an ecosystem's ability to withstand changes? I don't quite understand. Can you please elaborate?

*December 13, 2013*

**science**

If you need the answers for the complete test let me know.. I got 100% on this test.

*December 12, 2013*

**Math**

wait what does short mean?

*December 11, 2013*

**Algebra**

A roadside vegtable stand sells pumpkins for $5 each and squashes for $3 each. One day they sold $6 more squash than pumpkins, and their sales totaled $98. Write and solve a system of equations to find how many pumpkins and squash they sold?

*December 10, 2013*

**Chemistry**

In a solution with carbon tetrachloride as the solvent, the compound VCl4 undergoes dimerization: 2VCl4 <-> V2Cl8 When 6.6834 g VCl4 is dissolved in 100.0 g of carbon tetrachloride, the freezing point is lowered by 5.97*C/ Calculate the value of the equilibrium constant ...

*December 10, 2013*

**math**

It's okay I gotcha and anybody else here who needs help <3 it is D aka both a and b so the last one guaranteed :)

*December 9, 2013*

**21**

help me 9th gradge

*December 4, 2013*

**math**

45yards/minutes=______in./s

*December 2, 2013*

**PRE-ALGEBRA**

A 55-minute long distance phone costs 2.75.What is the cost per minute

*December 2, 2013*

**Math help, anyone?**

Solve the proportion. Where necessary, round to the nearest hundredth. Plz help i really need 2 get this in!! 11. 9/10 = x/10 9 *** 90 10 100 12. x/4 = 6/7 168 0.21 28 3.43 13.Write the ratio as a fraction in simplest form. 22:36 14. Write the ratio as a fraction in simplest ...

*November 26, 2013*

**Biology**

What do you think, is it likely that we will insert genes for new and better properties in humans? Is it desirable? What dangers can you see with such a development?

*November 26, 2013*

**Plz help :(**

Mrs. Sue plz help!!!

*November 25, 2013*

**science**

The answer is D. The whole square, and half the circle, and a completely empty circle. How would that be possible? Their child would have at least a 50% chance of having the illness. If you need more help let me know!

*November 23, 2013*

**Science**

Luis wanted to create a clay model of earth and the sun. To show how Earth rotates, Luis wants to use a toothpick to represent Earth's axis of rotation. Where should Luis place the toothpick? A. Horizontally through Earth in the direction Earth is traveling B. Vertically ...

*November 20, 2013*

**US History**

What times is Paine referring to? “These are the times that try men's souls. The summer soldier and the sunshine patriot will, in this crisis, shrink from the service of their country; but he that stands it now, deserves the love and thanks of man and woman."

*November 16, 2013*

**US History**

What is Patrick Henry referring to when he states : "Their clanking may be heard on the plains of Boston"?

*November 14, 2013*

**Stats**

0.62

*November 14, 2013*

**US History**

What does Patrick Henry mean when he writes "Shall we acquire the means of effectual resistance, by lying supinely on our backs..."

*November 14, 2013*

**pre-algebra**

I need help with number 9! Someone pls answer! Please stop commenting if you don't have the answer!

*November 14, 2013*

**US History**

thanks again

*November 12, 2013*

**US History**

What is Thomas Jefferson trying to say in this excerpt from the Declaration of Independence ? :The Right of the People to Control Their Government . . . We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain...

*November 12, 2013*

**US History**

thank you so much i was having problems because i don't speak the way that he speaks but thank you so much

*November 12, 2013*

**US History**

What does this excerpt from Common Sense by William Paine mean: But there is another and greater distinction for which no truly natural or religious reason can be assigned, and that is, the distinction of men into KINGS and SUBJECTS. Male and female are the distinctions of ...

*November 12, 2013*

**Physics**

n,bhyguftchg vb

*November 12, 2013*

**Science**

THANK YOU SO MUCH HOMEWORKHELPER!!!!!!

*November 6, 2013*

**Business**

$1,604,505

*November 5, 2013*

**math**

Slope intercept form is y=mx+b m- slope b- y-intercept To finish this problem, you have to find what the y-intercept is. Just put in what you know first, and try to figure out b. 3=4(-3)+b 3= -12 =b +12 +12 15=b You can know see that 15 is b, and you can fill in the slope ...

*November 4, 2013*

**5TH GRADE Math**

To find the common factor of something, you have to post all the factors of each number. For #1 you would do: 1- 1 4- 1, 2, 4 8- 1, 2, 4, 8 32- 1, 2, 4, 8, 16 Obviously the first one is 1. A easy way to find the common factor of these questions, is simply by seeing the first ...

*November 3, 2013*

**Organic Chemistry**

3.What would be the major product if 1,4-dibromo-4-methylpentane was allowed to react with: a)One equivalent of NaI in acetone? b)One equivalent of Silver Nitrate in ethanol?

*November 1, 2013*

**Science**

how does energy provided by the sun influence global weather patterns?

*October 26, 2013*

**Science**

thank you!

*October 26, 2013*

**Science**

How is earth like a system?

*October 26, 2013*

**english**

Which one of the following sentences is correctly punctuated? A. Look up, look down, and look all around? B. Smile when you say that, Partner? C. When will the winter end? D. Look at me, then say what you have to say?

*October 20, 2013*

**6th grade math**

no the answer has to be 48 i did his problem for 4 people and the answer was 48

*October 15, 2013*

**math**

Do the math your selves you K12's!

*October 15, 2013*

**Science**

Calculate the amount of energy in the form of heat that is produced when a volume of 3.56 L of SO2(g) is converted to 3.56 L of SO3(g) according to this process at a constant pressure and temperature of 1.00 bar and 25.0 °C. Assume ideal gas behavior.

*October 15, 2013*

**chemistry**

Calculate the amount of energy in the form of heat that is produced when a volume of 3.56 L of SO2(g) is converted to 3.56 L of SO3(g) according to this process at a constant pressure and temperature of 1.00 bar and 25.0 °C. Assume ideal gas behavior.

*October 15, 2013*

**Math**

it is definitely 9

*October 7, 2013*

**calculus**

Determine the value(s) of x where the function will have an instantaneous rate of change of 14. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) f(x) = x3 + 33 x2 + 14 x + 39

*October 3, 2013*