Tuesday

October 25, 2016
Total # Posts: 921

**chemistry**

C5H12 because the boiling point falls between Butane (C4H10) and Hexane's (C6H14) boiling points. The only compound that falls between the two is pentane

*April 28, 2014*

**Chemistry**

Hydrogen peroxide can act as either an oxidizing agent or a reducing agent, depending on the species present in solution. Write balanced half-reaction equations for each of the following: (a) H2O2(aq) acting as an oxidizing agent in an acidic solution. Write the balanced half-...

*April 28, 2014*

**Chemistry**

use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. on the chart is said ethane(C2H6) is -84.0. In the hint it said ...

*April 28, 2014*

**Chemistry**

At 25 °C, the equilibrium partial pressures for the following reaction were found to be PA = 4.10 bar, PB = 5.60 bar, PC = 1.20 bar, and PD = 9.70 bar. 2A(g)+2B(g)-->C(g)+ 3D(g) What is the standard change in Gibbs free energy of this reaction at 25 °C. I don't ...

*April 25, 2014*

**6th grade Lang Arts**

So... In sentence 1, the adjective clause is needed to let us know what stadium we're talking about. So we don't need to use a comma. In sentence 2, the adjective clause is not needed because we already mentioned my father as the subject. So, a comma can be used to set...

*April 21, 2014*

**6th grade Lang Arts**

Can you explain why the comma used in sentence 1 is not correct as compared to the comma used in sentence 2? (from homework) 1. The stadium, that my favorite team plays in, seats over 81,000 people. 2. My father, who is an excellent reader, finished a 500 page book in one day!

*April 21, 2014*

**Chemistry**

Calculate ΔG° for the following reaction at 298 K.? A+B --> 2D ΔH° = 775.0 kJ ΔS°=296.0 J/K C --> D ΔH° = 446.0 kJ ΔS°=-218.0 J/K A+B --> 2C ΔG° = ? kJ I know I am suppose to reverse the (C --> D) and add a ...

*April 20, 2014*

**Chemistry**

Thanks DrBob222!

*April 20, 2014*

**Chemistry**

If delta H°rxn and delta S°rxn are both positive values, what drives the spontaneous reaction and in what direction at standard conditions? The spontaneous reaction is a)enthalpy driven to the left. b)entropy driven to the right. c)entropy driven to the left. d)...

*April 20, 2014*

**Chemistry**

Thank you. I understand it a lot better. And as for equation, I figure that I figure that I left out the kPa. so that for the first process, there is a decrease in pressure so more movement for the molecules therefore S increases, right?

*April 20, 2014*

**Chemistry**

Predict how the entropy of the substance is affected in the following processes: a) O2 (g,200 kPa, 300k) --> O2 (g, 100, 300k) b)Br2 (l, 1 bar, 25 degree C) --> Br2 (g, 1 bar, 25 degree C) C)Fe (s, 1 bar, 250 degree C)--> Fe(s, 1 bar, 25 degree C) will entropy either ...

*April 20, 2014*

**6th grade Lang Arts**

Can you check my homework, please? Identify each pronoun as personal, reflexive, demonstrative, indefinite or interogative. 1. These are Elberta peaches, which are very popular in the United States. Ans: these = indefinite 2. Nobody really knows where the fruit came from ...

*April 16, 2014*

**Chemistry**

A solution of I2 was standardized with ascorbic acid. Using a 0.0500 g sample of the acid, 26.50 mL of I2 were required to reach the starch end point.

*April 14, 2014*

**Chemistry**

A 0.170-mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co2 ions at equilibrium? Assume the formation constant (Kf) of Co(NH3)62 is 5.0× 1031 M–6. I don't really know how to start. At first I thought about setting ...

*April 14, 2014*

**Algebra II**

The diagram shows the plan made by a landscape artist for a homeowner's 16-meter by a 16-meter backyard . The homeowner has requested that rosebushes, fountain, and garden bench be placed so that they are no more that 14 meters apart. A). Has the landscape artist met the ...

*April 1, 2014*

**Algebra 11**

The diagram shows the plan made by a landscape artist for a homeowner's 16-meter by a 16-meter backyard . The homeowner has requested that rosebushes, fountain, and garden bench be placed so that they are no more that 14 meters apart. A). Has the landscape artist met the ...

*April 1, 2014*

**Algebra II**

One method of irrigating crops is called the center picot system. This system rotates a sprinkler pipe from the center of the field to be irrigated. Suppose a farmer places one of these units at the center of a square plot of land 2500 feet on each side. With the center of ...

*April 1, 2014*

**chemistry**

3.4 * 10^3

*March 27, 2014*

**6th grade Lang Arts**

thanks!

*March 26, 2014*

**6th grade Lang Arts**

Can you check my answers? Name type of sentences 1. I believe my students are ready to take this test because everybody has worked hard to learn the material. Ans:complex independent - I believe my students are ready to take this test dependent - because everybody has worked ...

*March 26, 2014*

**Spanish 2**

Re-write the following sentences in correct Spanish and use direct and indirect object pronouns. 1.) We need to wash the car for you. 2.) We used to wash the car. 3.) Mom makes pizza. 4.) Mom makes pizza for me. 5.) I want to see a movie.(una película) 6.) Mom wants to ...

*March 25, 2014*

**6th grade Lang**

thank you for explaining :)

*March 18, 2014*

**6th grade Lang**

14. I can accept the rain and wind since I know that these two elements are important to water the earth and then to dry it back out again. ans: complex I can accept the rain and wind = independent clause since I know that these two elements are important to water the earth = ...

*March 18, 2014*

**6th grade Lang **

Can you recheck these? I don't understand. 10. I enjoy it because the temperature is pleasant, and everything is green and pretty. ans: cd (compound) 11. I also love to hear the birds singing in the trees and to watch them building their nests. ans: SS (simple) 13. In the ...

*March 18, 2014*

**6th grade - Lang Arts**

No, i don't understand. 10. I enjoy it because the temperature is pleasant, and everything is green and pretty. ans: cd (compound) 11. I also love to hear the birds singing in the trees and to watch them building their nests. ans: ss (simple sentence)

*March 17, 2014*

**6th grade - Lang Arts**

Can you check the following? Find the verb phrase 1. Will you buy me a drink? ans: will buy 2. Sam is not going to the dance. ans: is going 3. Al should have mowed the lawn today. ans: should have mowed 4. Theresa will be playing her clarinet at the concert tonight. ans: will ...

*March 17, 2014*

**Algebra**

Daniel has a piece of wire that is a fifth of a yard long. He cuts the wire into three equal pieces. What fraction of a yard is each piece?

*March 17, 2014*

**Algebra II**

Simplify 4-7i/2+5i

*March 15, 2014*

**Pre-Calculus**

Express the complex number in polar form. 5-12i

*March 15, 2014*

**Pre-Calculus**

Find this quotient. Express the result in rectangular form. 9(cos3π/2 + isin3π/2) ÷ 3(cosπ/4 + isinπ/4)

*March 15, 2014*

**Pre-Calculus**

Express the number in rectangular form. 3(cosπ/3+isinπ/3)

*March 15, 2014*

**Pre Calculus**

Find each product or quotient. Express the result in rectangular form. 2(cosπ/6+isinπ/6) X 4(cos2π/3 +i2π/3)

*March 15, 2014*

**Calculus**

Find four other forms of the point (4, 105°) Two of the four must include a negative r value.

*March 14, 2014*

**Pre-Calculus**

Write the polar equation in rectangular form... r=5sintheta

*March 13, 2014*

**Pre-Calculus**

Find the polar coordinates of each point with the given rectangular coordinates. Use degrees. (-4,-3)

*March 13, 2014*

**Pre Calculus**

Write the rectangular equation in polar form... x=3

*March 13, 2014*

**Pre-Calculus**

Find the rectangular coordinates of the point with the given polar coordinates. (3, 150°)

*March 13, 2014*

**6th grade math**

I have to determine which method - mean, median, or mode - would be best for answering the following question: Find the average number of athletes for the sample of 7 countries listed by deciding which measure of center is the best represntation of the number of athletes from ...

*March 12, 2014*

**6th grade math - statistics**

Can you explain why Q1 = 3.5 and Q3 is 9 out of this dataset 0, 1, 3, 4, 6, 7, 7, 7, 8, 10, 12, 12. My answers were: Assuming median would be 7 (using numbers in positions 6 and 7 where 7+7/2 = 7) Q1 dataset would be 0,1,3,4,6; Q1 = 3 Q2 dataset would be 7,8,10,12,12; Q3= 10 ...

*March 10, 2014*

**Pre-Calculus**

Find vector a<3,2,-4> X vector b<-6, 9,0>

*March 3, 2014*

**Pre-Calculus**

Phil Dawson is a professional place kicker for the Cleveland Browns. On average, he kicks the ball at a 41 degree angle and with an initial speed of 70 feet per second. For future reference, goal posts are 10 feet high in the NFL. a) Write parametric equations to model Dawson...

*March 3, 2014*

**Pre-Calculus**

Write an equation in slope-intercept form of the line with the given parametric equations. x=t+6 y=2t-4

*March 3, 2014*

**Pre-Calculus**

Write Parametric equations of -3x+1/2y=2

*March 3, 2014*

**Pre-Calculus**

A 15N force acting at 15 degrees north of east and a 18N force acting at 79 degrees north of west act concurrently on an object. What is the magnitude and direction of a third force that produces equilibrium on the object? Show sketch and work. ------ x-component:: 15*cos(15 ...

*March 3, 2014*

**Math**

Jake serves a volleyball with an initial velocity of 32 feet per second from 4.5 feet above the ground at an angle 0f 35 degrees. a) Write parametric equations to model the situation. h(t) = -16t^2 + 32t + 4.5 --------------------------------------- b) How long will the ball ...

*March 3, 2014*

**Pre-Calculus**

Phil Dawson is a professional place kicker for the Cleveland Browns. On average, he kicks the ball at a 41 degree angle with an initial speed of 70 feet per second. For future reference, goal posts are 10 feet high in the NFL. a) Write parametric equations to model Dawson'...

*February 28, 2014*

**Pre-Calculus**

Write Parametric equations of -3x+1/2y=2

*February 28, 2014*

**Pre-Calculus**

Jake serves a volleyball with an initial velocity of 32 feet per second from 4.5 feet above the ground at an angle 0f 35 degrees. a) Write parametric equations to model the situation. b) How far will the ball travel( if it hits the ground)show work

*February 28, 2014*

**Algebra**

For a given two-digit number, the second digit is 2 more than 5 times the first digit. Also, 5 times the first digit is 3 more than the second digit. Find the two-digit number,

*February 27, 2014*

**Math**

dont know

*February 17, 2014*

**arithmetic sequences**

a new car cost $13,000 and is depreciating by $900 each year. how much will the car cost be worth after 4 years?

*January 9, 2014*

**arithmetic sequences**

a tube containing 3 ounces of toothpaste is being used at at rate of 0.15 ounces per day. how much toothpaste will be in the tube after one week?

*January 9, 2014*

**arithmetic sequences**

jessie is playing an arcade game that costs 50cents for the first game and 25cents to continue if she loses. how much will she spend on the game if she continues 9 times?

*January 9, 2014*

**algebra**

a new car costs $13,000 and is depreciating by $900 each year..how much will the car be worth after 4 years?

*January 9, 2014*

**EARTH SCIENCE**

is not d

*January 7, 2014*

**social studies**

list and describe the problems that the new state of louisiana faced

*December 30, 2013*

**Algebra 2 9th/11th grade math**

how do i do interval notation

*December 19, 2013*

**Vocbulary**

Yw

*December 15, 2013*

**Vocbulary**

Forming an unbroken whole; without interruption.

*December 15, 2013*

**Statistics**

You are so welcome

*December 15, 2013*

**Statistics**

Yes

*December 15, 2013*

**Statistics**

The null hypothesis will be that all population means are equal, the alternative hypothesis is that at least one mean is different.

*December 15, 2013*

**Math check**

Ya it would be

*December 15, 2013*

**Math check**

That is correct

*December 15, 2013*

**English**

Sorry that was my sister. She is 10. She typed what I wanted her to while i did something

*December 15, 2013*

**English**

Okay.

*December 15, 2013*

**English**

I wrote the 1st paragraph and then got stuck. Thank you for the help but I could ask my mom for help

*December 15, 2013*

**English**

I have to come up with a 2 page paper about Sandy Hook including : names of all victims, opinion, and what we could do to support Sandy Hook and the only part i am stuck on is that I don't know what to write for support! And my opinion!

*December 15, 2013*

**English**

Donate money to them???? I don't know this is WAY too hard. I have been working on this all weekend and it is due tomorrow

*December 15, 2013*

**English**

I want to say like how we could help support Sandy Hook but at the same time I want to include many of the names.

*December 15, 2013*

**English**

I need more info I am having so much trouble. I am only in 7th grade

*December 15, 2013*

**English**

What is a PERFECT essay about Sandy Hook Elementary School?

*December 15, 2013*

**Super quick english question**

Which sentence has correct capitalization? The river was moving fast: One hundred miles an hour. The guide did something amazing: She steered the canoe safely through the flooded river. Only one person stayed calm: The guide. The guide was accomplished at many things: Rafting...

*December 14, 2013*

**6th grade math**

Ok.. for #4, i was trying to show that i subtracted 3 from both sides; #7, I was trying to show that I multiplied both sides by 3; and #8 was trying to show that I added 6 to both sides. I agree that I like how you showed it in #8. Thanks Reiny!

*December 11, 2013*

**6th grade math**

Can you check these inequalities? 1. Chancellor is saving $15 each week for at least n weeks to buy a skateboard that cost $150. Write an inequality to represent this real life situation. Ans: 15n >= 150 2. Write an inequality to represent the possible speed allowed fi the ...

*December 11, 2013*

**6th grade grammar**

whew..thanks! I need to review more.

*December 11, 2013*

**6th grade grammar**

hmm.. 1. Celina is coming to my house after dinner. action verb = coming verb phrase = is coming 2. The weather was beautiful this past weekend. - this is linking verb only (was)? 4. He has been sick all this week. verb phrase = has been 5. We were not happy about our team'...

*December 11, 2013*

**6th grade grammar**

Can you check these sentences? Identify whether each sentence includes an action verb, linking verb, or verb phrase. 1. Celina is coming to my house after dinner. Linking = is verb phrase = is coming 2. The weather was beautiful this past weekend. Linking = was verb phrase = ...

*December 11, 2013*

**Math**

9,876,543,012

*December 9, 2013*

**Physical Science**

Please HELP !!!!

*December 9, 2013*

**Physics**

what is the accuracy percent of 11 divided by 267 times 100?

*December 9, 2013*

**Trig**

86.16 i believe

*December 9, 2013*

**math 5th grade**

15

*December 9, 2013*

**math 5th grade**

Mary baked a dozen M&M cookies. There were 45 M&M's in the bag. Each cookie had a minimum of 3 M&M's. What are all the different possibilities?

*December 9, 2013*

**Help me pls geometry**

UVW~XYZ, UV= 15, UW=25, and XZ=60. If the perimeter of XYZ is 168, what is the perimeter of UVW?

*December 9, 2013*

**Psychology**

The answer is C. Albert Ellis depicts the relationship between irrational belief and negative emotions through use of the A-B-C model.

*December 9, 2013*

**help me pls geometry**

Which tirangles must be similar 1. Two right triangles with a congruent acute angle 2. Two obtuse angles 3 Two isosceles triangles with congruent bases 4. Two scalene triangles with a congruent angle

*December 9, 2013*

**help me pls geometry**

If ab=8, BC=14, and df=33 what is ef?

*December 9, 2013*

**6th grade math**

Oh.. thanks!

*December 5, 2013*

**6th grade math**

Can you check the following problems related to inequalities? 1) Sue has more than 5 cookies. Ans: x > 5 2) The temperature was less than 88 degrees last night. Ans: x < 88 3) I made $75 or more dollars babysitting. Ans: x >= 75? 4) I need to make a 70 or more on my ...

*December 5, 2013*

**math**

Two common names for streets are First Street and Main Street, with 12485 streets bearing one of these names. There are 2105 more streets named First Street than Main Street. How many streets bear each name?

*December 4, 2013*

**Math**

A department store sold 63 shirts one day. All short-sleeved shirts cost $15.00 each and all long-sleeved shirts cost $22.00 each. Total receipts for the day were $1,134.00 . How many of each kind of shirt were sold?

*December 4, 2013*

**6th grade grammar**

Thanks Steve and Ms. Sue!

*December 3, 2013*

**6th grade grammar**

ok.. i think i got it. thanks!

*December 3, 2013*

**6th grade grammar**

Can you explain linking verbs? I'm getting confused. (To decide, I used 'is' or 'was' to replace the verb). These are the ones I missed. 1. Paul's exhibit remained on display for an entire month. By replacing with 'was', the sentence still makes...

*December 3, 2013*

**6th grade grammar**

Thanks! think i'm understanding it.

*December 2, 2013*

**6th grade grammar**

Thanks! Looking at linking vs action verb, just wondering if i got it switched: 3. This pie tastes good with whip cream. Subject = pie action verb = tastes I tried substituting with 'is' and the sentence makes sense. Is 'tastes' a linking verb in this sentence?

*December 2, 2013*

**6th grade grammar**

Can you check the following sentences, please? Identify the subject and verb (action or linking). 1. Jim looked through his closet for his favorite shirt. Subject = Jim action verb = looked 2. A ghost appeared in the doorway. Subject = ghost action verb = appeared 3. This pie ...

*December 2, 2013*

**Algebra**

i need help

*November 26, 2013*