Saturday

December 10, 2016
Total # Posts: 1,408

**Chemistry**

Calculate the total pressure above 1.0L solution of a 1.42M CH3OH(aq) solution at 25 degrees(C). The vapor pressure of pure methanol at 25 degrees (C) is 127.1 torr and the vapor pressure of the pure water is 23.8 torr at 25 degrees(C. You may assume that the density of the ...

*December 6, 2016*

**Chemistry**

What is the vapor pressure of a solution prepares by dissolving 4.25g of K2O in enough water to preapare 1.25L of Solution at 25 degrees (C)? Assume that the density of the solution is 1.00 g/mL and that the vapor pressure of pure water is 23.8 torr at 25 degrees (C). I've...

*December 6, 2016*

**Math**

Compare partial products and regrouping. Describe how the methods are alike and different

*December 6, 2016*

**Math**

Tim has read 60% of a book. He has 24 more pages to finish. How many pages are there in the book?

*December 5, 2016*

**Science**

A boy pushes a box of mass 57 kg and it moves with an acceleration of 11.4 m/s2. what amount of force is the boy exerting on the box?

*December 5, 2016*

**Physics**

During an adiabatic process, the temperature of 6.50 moles of a monatomic ideal gas drops from 525 °C to 169 °C. What is the work done? Here is my work, is it correct? T1 = 525+273 = 798 K T2 = 169 + 273 = 442 K work done = R[T2-T1]/1-gamma = 8.314[525 - 798]/(1-1.67...

*November 30, 2016*

**English**

i have but i dont think my interpretation of the story is correct, i must prepare a speech about this story and I dont want to be inncorect since my proffesor said to ask others

*November 30, 2016*

**English**

has anyone read the short story "the new veterans" and can give me like a summary of what happened in the story? i already tried looking online but couldn't find a complete summary? i just need to know mainly the plot? it would be much help

*November 30, 2016*

**Physics**

A Carnot engine of efficiency 41% operates with a cold reservoir at 24 °C and exhausts 1290 J of heat each cycle. What is the entropy change for the hot reservoir? Answer in J/K. I keep getting the answer incorrect. Here is the work: Efficiency = 100*(Th- Tc)/Th 41 = 100*(...

*November 28, 2016*

**Social studies**

*much

*November 28, 2016*

**Social studies**

Okay thanks so mucho for checking my answers:)

*November 28, 2016*

**Social studies **

Which of the following did Ralph Waldo Emerson stress the importance of in his writings? The individual •• The family Agriculture Industry

*November 28, 2016*

**Social studies**

The last one

*November 28, 2016*

**Social studies**

Nevermain I meant to say is it the first one?

*November 28, 2016*

**Social studies**

Wait is it The last one???

*November 28, 2016*

**Social studies **

Which of the following is a key idea of transcendentalismo? Belief in human reason Belief in personal insights Belief in expansion of the country •• Belief in isolation from other nations

*November 28, 2016*

**American Government**

Is it dual federalism?

*November 26, 2016*

**Math**

How many 1/3 are there in 25/5

*November 26, 2016*

**Phisics **

Determine the power of a motor of a 1200 kg car that changes its speed from 10 m / s to 16 m / s in 3 seconds. Express the result in horsepower and consider null friction.

*November 24, 2016*

**History**

Which answer most precisely describes the location of mecca and Medina? A. Arabian peninsula B. Holy land and Mesopotamia C. North Africa D. Southwest asia I think it is B not too sure.

*November 22, 2016*

**Physics**

A quartz sphere is 14.0 cm in diameter. What will be its change in volume if its temperature is increased by 305 °F? (the coefficient of volume expansion of quartz is (1.50 × 10^-6) °C-1) Answer in cm^3 I tried this twice and got 0.657 cm^3 and 0.18cm^3 but they ...

*November 16, 2016*

**Physics**

a box sliding on a horizontal surface with a speed of 6m/s encounters an incline plane that makes a 15 degree angle with the horizontal line. What is the max distance that will be travelled by the box up the incline before coming to rest if the coefficient of kinetic friction ...

*November 13, 2016*

**Physics**

A car is traveling at 7.0 m/s when the driver applies the brakes. The car moves 1.5 m before it comes to a complete stop. If the car had been moving at 14 m/s, how far would it have continued to move after the brakes were applied? Assume the braking force in both cases is ...

*November 12, 2016*

**Chemistry**

Consider the neutralization reaction that takes place when hydrochloric acid reacts with aqueous calcium hydroxide Write a complete balanced equation for this reaction

*November 11, 2016*

**Physics**

A raft is made of 15 logs lashed together. Each is 30.0 cm in diameter and has a length of 7.00 m. How many people (whole number) can the raft hold before they start getting their feet wet, assuming the average person has a mass of 66.0 kg? Do not neglect the weight of the ...

*November 9, 2016*

**Math **

Write a polynomial of the lowest degree with real coefficients and with zeros 6-3i (multiplicity 1) and 0 ( multiplicity 5)

*November 9, 2016*

**English **

Write a sequence of events of story welcome to dead house by r.l stine

*November 2, 2016*

**Calculus**

The measurement of the circumference of a circle is found to be 70 centimeters, with a possible error of 0.9 centimeter. a) Approximate the percent error in computing the area of the circle. (Round your answer to two decimal places.) b) Estimate the maximum allowable percent ...

*October 31, 2016*

**Math **

Tickets at a fair cost $0.75 each. You can also buy a roll of 25 tickets for $15.00. What is the cost of each ticket if you buy a roll of tickets.

*October 31, 2016*

**Reading**

Where are the words asset and pitiful in the book hatchet????

*October 27, 2016*

**Stats**

HELP!! I have no idea to get this answer :( a doctor wants to estimate the HDL cholesterol of all 20-29 year old females. how many subjects are needed to estimate the HDL cholesterol within 4 points with 99% confidence assuming the standard deviation is 10.8? Suppose the ...

*October 8, 2016*

**English**

Staggered is what type of context clue

*September 27, 2016*

**Math**

Logan puts a wallpaper border along the top edge of the Four Walls of a rectangular room the room is 10 feet long and 12 feet wide if there are no breaks in the Border how long is it?

*September 27, 2016*

**Biology**

Explain the structure of a water molecule and how hydrogen bonding leads to some of its very special properties. Be sure to include how these properties are important to life on Earth

*September 24, 2016*

**Physical Science/ Chemistry**

Which of the following shows the correct order of Family #1 elements from least to most reactive? A) Li, Na, Rb, K B) Li, Na, K, Rb C) Rb, K, Na, Li D) Li, Na, K, Ba

*September 22, 2016*

**Math**

5/5334

*September 21, 2016*

**Math**

Nathan plants equal sized square of sod in his front yard each square has An area of 6 square feet Nathan plants a total of 1,000 squares in his yard what is the total area of the square sod

*September 18, 2016*

**Math**

5 11/15 divde 9/19

*September 13, 2016*

**Math**

The function rule T–4, 6(x, y) could be used to describe which translation?

*September 10, 2016*

**stats**

scores on a University exam are normally distributed with a mean of 68 and a standard deviation of 9. use the 68-95-99.7 rule to answer the following questions 1) what proportions of students score between a 59 to 77? 2) what proportions of students score between a 50 to 86? 3...

*September 5, 2016*

**Algebra 1**

Mary is 9 years younger than Greg's age doubled, and their total ages combined equals 33. Create and solve an equation to find both children's ages.

*September 2, 2016*

**Arithmetics**

if there are 380 females students in a class, and male students take up 60% of the class, how many total students are in the class? 380/0.6 = 633??

*June 9, 2016*

**Chemistry**

Check my answers 63. What type of bond links the monomers together in a polymer? Poly bond Covalent bond Ionic bond Hydrogen bond*** 64.What is the change in atomic mass when an atom emits a beta particle? decreases by 1*** increases by 1 decreases by 2 remains the same 65. ...

*June 2, 2016*

**Chemistry**

so C?

*June 2, 2016*

**Chemistry**

You are given Ka of carbonic acid is 4.3 x10^-7. This means that Carbonic acid is a good hydrogen-ion acceptor*** good hydrogen-ion donor poor hydrogen-ion acceptor poor hydrogen-ion donor

*June 2, 2016*

**Chemistry**

Calculate the molality of a solution prepared by dissolving 225.5 g KNO3 in 825mL of water. Show your work

*June 2, 2016*

**history**

Which statement best describes the provisions of the Missouri Compromise? a) It maintained the balance of free and slave states. b) It enacted a stricter fugitive law. c) It outlawed slavery in the District of Columbia. d) It prohibited slavery in the Northwest Territory.

*May 26, 2016*

**General Chemistry**

thank you :D

*May 26, 2016*

**General Chemistry**

omg that should say 1.50 mmol

*May 26, 2016*

**General Chemistry**

A 1/5 mmol (yes, millimol... no, it isn't a typo_ sample of XeFn h as a mass of 0.311 g. What is the value of n? The answer is 4, but why?

*May 26, 2016*

**maths**

i= the square root of -1 so multiply the whole term by i/i to get -5i

*May 26, 2016*

**maths**

the second equation should be L=5+2W my bad.

*May 26, 2016*

**maths**

2L+2W=142 L+5=2W solve the system of equations

*May 26, 2016*

**math**

you're missing part of the question. do you have a % interest?

*May 26, 2016*

**Math**

In a group of 10boys each boy had 2 hats how many hats did they have?

*May 24, 2016*

**Chemistry**

What is the oxidation half reaction for the following equation: Cr2O7^-2 +Fe+2 - - > Cr^+3 + Fe^+3 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2*** Cr2O7^-2 - -> Cr^+3

*May 20, 2016*

**Chemistry**

Which atom has a change in oxidation number of –3 in the following redox reaction? K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2 K Cr*** O S

*May 20, 2016*

**Math**

8x - 4 - x = -5

*May 13, 2016*

**Chemistry**

If i have 0.5 mole of hydrogen peroxide how many moles of oxygen would be produced assuming all of the hydrogen peroxide decomposes?

*May 1, 2016*

**Chemistry**

If i have 0.5 mole of hydrogen peroxide how many moles of oxygen would be produced assuming all of the hydrogen peroxide decomposes?

*April 30, 2016*

**algebra with pizzazz**

What might you have if you don't feel well

*April 21, 2016*

**Language arts**

Emily is correct got 100%

*April 20, 2016*

**Math**

The school bus will be either be on time ir late. The probability that it will be on time is therefore 0.5.

*April 20, 2016*

**Math**

I am doing a practice test and I am stuck on a couple of questions. 1.) Write a rule for the following sequence 8, -1, -10, -19 2.) Find the next three terms of the sequence -2, -12, -72, -432 3.) Which explains why the sequence 81, 3, 1/9 thanks

*April 17, 2016*

**MATH **

How much would you have to invest into a 5 year certificate of deposit paying 2.3% compounded weekly to make it worth $4500 at the end of the term? A=P(1+r/n)^nt 4500=P(1+0.023/52)^52(5) I am receiving a syntax error please help

*April 9, 2016*

**history**

Explain how fear of communism during the Cold War affected American society. How did this affect the balance between national security and civil liberties?

*April 8, 2016*

**physics**

a block slides along a path that is without friction until the block reaches the section of length L = 0.75 m, which begins at height h = 2.0 m on a ramp of angle θ = 30°. In that section, the coefficient of kinetic friction is 0.40. The block passes through point A ...

*March 30, 2016*

**chemistry**

why were you instructed to add distilled water in step 12, and possibly more distilled water in step 15? what purpose does the water serve?

*March 23, 2016*

**Literature**

Why does Shelley have Frankenstein choose England for the creation of the second creature. What possibilities from her life might be reflected in this? How does this choice relate to Romanticism?

*March 16, 2016*

**Math**

x= amount of children who play tennis y= total amount of children

*March 14, 2016*

**Math**

.25=8/x .20=x/y x=32 .20=32/y y=160

*March 14, 2016*

**Spanish**

Prepara (1) _____ para salir de viaje el lunes por la mañana. Para ello, haz (2) ______ las maletas, sal (3) _____ de la habitación y métete (4) _____ en el coche. Después, ponte (5) _____ el cinturón y ten (6) ____ paciencia porque el viaje ...

*March 3, 2016*

**Math**

1 hour = 60 minutes 1/3 hour = 60/3= 20 minutes 5 hours= 300 minutes 5 1/3 hours= 320 minutes therefore the answer is (320/2)-40

*March 2, 2016*

**physics**

Boxes A and B are connected to each end of a light vertical rope. A constant upward force F = 80.0 N is applied to box A. Starting from rest, box B descends 12.0 m in 4.00 s. The tension in the rope connecting the two boxes is 36.0 N. What are the masses of (a) box B, (b) box A?

*March 1, 2016*

**Math**

12P+15A=100

*March 1, 2016*

**Math**

1- 1/3- 1/5= 15/15- 5/15- 3/15= 7/15 of the pizza is left

*March 1, 2016*

**Calculus**

Two sides of a triangle have lengths 8 m and 13 m. The angle between them is increasing at a rate of 0.08 radians /min. How fast is the length of the third side increasing when the angle between the sides of fixed length is π/3 radians.

*February 24, 2016*

**Algebra**

The problem has two related parts 1) let a be an arbitrary real number. Find the distance between the point (1,2) and the point (4,a). (answer should be an algebraic expression in terms of a). 2) find the value of b for which the point (0,b) is equidistant from (4,4) and (5,-4...

*February 24, 2016*

** essay **

While servant leadership is often associated with Christianity and the Bible, one could argue it is compatible with most religions and philosophies and that it transcends cultures. This assignment presents you with an opportunity to explore other cultures, philosophies, and ...

*February 20, 2016*

**Living environment **

why is estrogen and progesterone most closely associated with build up of the uterine lining in the human female during the menstrual cycle ?

*February 17, 2016*

**Living environment **

Why does meiosis and fertilization lead to the greatest variety of genetic combinations ? . iM doing test corrections and I am struggling to explain the question above . So far all i said was that that was the only answer that made sense but i need more details , please help ...

*February 17, 2016*

**Math and are my answers correct **

1.Male and female high school students reported how many hours they worked each week in summer jobs. The data is represented in the following box plots: two box plots shown. The top one is labeled Males. Minimum at 1, Q1 at 3, median at 10.5, Q3 at 14, maximum at 21. The ...

*February 15, 2016*

**URGENT! Due soon and I used 8 of 10 attempts **

Archaeologists can determine the age of artifacts made of wood or bone by measuring the amount of the radioactive isotope 14C present in the object. The amount of isotope decreases in a first-order process. If 14.5% of the original amount of 14C is present in a wooden tool at ...

*February 14, 2016*

**Algebra**

Write an equation that expresses the following relationship. P varies directly with the square of D. In your equation, use K as the constant of proportionality.

*February 8, 2016*

**Algebra**

Write an equation that expresses the following relationship. U varies directly with the cube of P and inversely with D. In your equation,use K as the constant of proportionality.

*February 7, 2016*

**English**

Thanks

*January 28, 2016*

**English**

Find the complete predicate and the verb or verb phrase, 1. Carl lifted the lid of the pot. Lifted is the verb Lifted the lid of the pot is the Complete predicate Is this right?

*January 28, 2016*

**Physics**

A ball is thrown straight up at 24.0 m/s. Ignore the effects of air resistance in your calculations.After 2.00 s?

*January 23, 2016*

**Connexus Help**

Does anybody go to Connexus Acadimy 7 grade??i need someone to correct my Art questions!!

*January 18, 2016*

**World History**

Which of the following statements about the European colonial powers is correct? A. They were careful not to divide ethnic and cultural groups. B.They believed in a democratic rule. C. They ruled by force and oppression D. They had the consent of the people being governed.

*January 16, 2016*

**algebra**

A student has scores of 72, 78, and 87 on three government exams. What score does she need on a fourth exam to give her an average of 80 or better?

*January 15, 2016*

**Science**

each of the two tall pea plants carry a recessive gene for a small plant in their genetic family tree

*January 11, 2016*

**Physical Education**

yup!

*January 11, 2016*

**Math ASAP**

0.18, 1/5, 0.21, 0.24 the answer is c) :)

*January 11, 2016*

**Spanish**

yup! that's right! :)

*January 11, 2016*

**thank you!**

thank you dr.bob and damon! :)

*January 11, 2016*

**math/ chemistry**

oh, sorry! yes, M= 62g/mol in my case and I need to go from there to mol/L. and the question is: The solubility of magnesium fluoride, MgF2(s), is 1.72x10^-3 g/100mL at 25 degrees. What is the Ksp value for Magnesium fluoride at 25 degrees?

*January 11, 2016*

**math/ chemistry**

so I have this chemistry problem which involves math and basically I need to convert 62 g/mol into mol/L but I don't know how. like do you DIVIDE the g/mol by 1000 to convert g to L? and then how to you get the mol to become the numerator?

*January 11, 2016*

**algebra**

Meghan pays 10% more each month in rent than Scott, and together they pay $892.50 per month. How much does Meghan pay per month? Round the answer to the nearest cent, if necessary. Meghan pays $ each month.

*January 8, 2016*

**algebra**

A student's grade in a course is the average of 4 test grades and a final exam that is worth three times as much as each test. Suppose a student has test grades of 90, 88, 81, and 94. Write an equation to model this situation where x is the student's grade on the final...

*January 8, 2016*