# Posts by Summer

Total # Posts: 338

**Chemistry**

For the reaction below 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(g) calculate Srxn at 298 K. (Hint: Use a table of thermodynamic data commonly found at the back of chemistry textbooks.)

**Chemistry**

Thank you Dr. Bob.

**Chemistry**

A researcher is studying the decomposition of A as shown by the general reaction below: 2 A(g) 4 B(g) + 2 C(g) Initially, the scientist fills an evacuated 1.772 L flask with 3.710 x 10-1 moles of species A. Upon equilibrium, it is determined that the concentration of A is 4....

**Chemistry (Equilibrium)**

Oh! Thank you :)

**Chemistry (Equilibrium)**

Given the reaction below 2NOBr(g) <==> 2NO(g) + Br2(g) and the value of Kc = 1.98, at a temperature of 480 K what is the value of Kp ? (Hint: Use the value of R in the appropriate units.) I used the equation Kp=Kc(RT)^Delta N Then plugged in to get Kp=1.98(.0821x480k)^-1...

**Calculus**

Find the RMS value of the function i=15[1-e^(-1/2t)] from t=0 to t=4 A. 7.5[sqrt(1+4e^-2 -e^-4)] B. 7.5[sqrt(4-2e^-2 +e^-4)] C. 7.5[sqrt(4+4e^-2 -e^-4)] D. 7.5[sqrt(5-2e^-2 +e^-4)]

**Psychology**

If psychological needs have presumptive brain or physiological correlates, are they still psychological needs?

**4th grade Math**

How can making small groupsh help youe estimate large numbers?

**psychology**

Name one to three important theorists associated with biological psychology.

**Chemistry**

Calculate Delta G for H2O(g) + 1/2 O2(g) <-> H2O2(g) at 600. K using the following data: H2(g) + O2(g) <-> H2O2(g) k = 2.3 X 10^6 at 600. K 2H2(g) + O2(g) <-> 2H2O(g) k = 1.8 X 10^37 at 600. K

**Chemistry**

How do I find the equilibrium constant for 4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(g) at 825 degrees celcius, assuming that delta H and delta S knot do not depend on temperature, and Delta H is -908 KJ and Delta S is 1206 KJ?

**Chemistry**

Calculate Delte G Knot for H20(g) + 1/2 O2 <-> H2O2(g) at 600. K, using the following data: H2(g) + O2(g) <-> H2O2 (g) K = 2.3 X 10^6 at 600. K 2H2(g) + O2(g) <-> 2H20(g) K= 1.8 X 10^37 at 600. K

**Psychology**

Part F is what i need help on this is due in a few hours please help!! Thanks

**Psychology**

Please I need help understanding this!!!

**Psychology**

Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows. Person Dexterity Anxiety 1 1 10 2 1 8 3 2 4 4 4 -2 (c) figure the correlation coefficient; (d) figure ...

**Psychology**

Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test (with an estimated population standard ...

**Psychology**

Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking—even if they are not exposed to the usual pattern of sunlight. To test...

**Physics**

18.615

**psychology**

A researcher predicts that listening to music while solving math problems will make a particular brain area more active. To test this, a research participant has her brain scanned while listening to music and solving math problems, and the brain area of interest has a ...

**Trig**

Use linear velocity to find out how many miles per hour Jethro's truck is going. In 15 seconds, Jethro's truck's 24-inch diameter tires rotated 101 times.

**Chemistry**

Which of the following solutions of strong electrolytes contain the largest number of ions: 100.0 mL of 0.30 M AlCl3, 50.0 mL of 0.60 M MgCl2, 200.0 mL of 0.40 M NaCl?

**Chemistry**

How do you assign oxidation states for each atom in the following compounds? 1. KMnO4 2. NiO2 3. Na4Fe(OH)6 4. (NH4)2HPO4 5. C6H12O6

**Chemistry**

Predict and balance the following organic reactions. 1. Ethanol(ethyl alcohol) and methanoic acid(formic acid) are mixed and warmed. 2. Ethanoic acid is combined with propanol.

**english**

no error

**Chemistry**

Solved, Nevermind.

**Chemistry**

Part 1: Each molecule of NO2, nitrogen dioxide, consists of 1 atom of N and 2 atoms of O. If you have 0.155 g. of NO2, how many molecules of NO2 do you have ? 0.155gx46.0 = moles moles x 6.02 E23 = answer Part 1 Answer: 2030000000000000000000 Part 2: How many atoms of N do you...

**chem 1151**

20.0% acetone 18.0% Ethyl Alcohol 62.0% water You take the mL you're trying to find divided by the whole solution, then multiply by 100. For example, you have 50.0mL/250.0mL = 0.20 Take 0.20 x 100 and it will give you the percent.

**Chemistry**

I found this answer, thank you :)

**Chemistry**

Part 1: Each molecule of NO2, nitrogen dioxide, consists of 1 atom of N and 2 atoms of O. If you have 0.155 g. of NO2, how many molecules of NO2 do you have ? 2030000000000000000000 was the correct answer Part 2: How many atoms of N do you have ?

**math**

-4<2x-3<4 add 3 to all sections -1<2x<7 Dive each section by 2 -0.5<x<3.5

**Chemistry**

Than you can be the one to tell my prof that, sir :)

**Chemistry**

Our work is online, and I tried to enter it as 2.03E21 and it would not accept it. It only accepts the answer if everything is correct. Thank you :)

**Chemistry**

Thank you :) 2030000000000000000000 was the correct answer Part 2: How many atoms of N do you have ?

**Chemistry**

Each molecule of NO2, nitrogen dioxide, consists of 1 atom of N and 2 atoms of O. If you have 0.155 g. of NO2, how many molecules of NO2 do you have ? If you could, please include steps as to how to do the problem. Thank you

**Algebra 1**

An airplane flies 750 miles due west in 1 1/2 hours and 750 miles due south in 2 hours. What is the average speed of the airplane?

**Social studies**

Why did people long ago form communities

**Math**

The area of a photograph is 15 square inches. If the width of the photograph is 3 inches, what is its length?

**Chemistry**

A titration is performed by adding .600 M KOH to 40.0 mL of .800 M HCl. Calculate the pH before addition of any KOH. Calculate the pH after the addition of 5.0 mL of the base. Calculate the volume of base needed to reach the equivalence point. What is the pH at the equivalence...

**geometry**

elbert wants to plant grass seed in his backyard. His yard is shaped like a rectangle that is 6 meers by 7 meters. He plans to use a cup of seed for every square in his yard. How many cups of grass seed will he need?

**Geometry**

pa and pb are tangents to circle from point p. chord ab is drawn. find the number of degrees contained in angle pab if angle apb contains a)80 degees b 40 degrees c) 60 degrees d) 90 degrees e) 120 degrees can some1 pllllz explain this 2 me!

**Math**

Here is a question that I am really stuck on and I need some help!!: In the Unites States, about one person in eight lives in California. To the nearest percent, what percent of people in the Unites States live in California?

**math**

A vehicle leaves a skid mark of 40 ft before stopping. What has the approximate speed of the vehicle before it stopped? (the formula is speed=.7 times length, then find the square root times 5.5) Is is 25-35 mph?

**math - check plz**

She has 2 to the 10th power of fruit flies in each of 2 to the 2nd power. How many fruit flies does she have in all? (answer as power) 2to the 11th power?

**Science**

How are the nucleus, genetic material, chromosomes, genes, DNA, and base pairs interrelated?

**Actuarial Math**

Fund A accumulate at 8% effective and fund B accumulates at 10% effective. at the end of 20 years, the total of the two funds is $3000. at the end of 10 years the amount in fund A is half the in Fund B. what is the total of the two funds at the end of 5 years

**Actuarial Math**

The sum of the accumulated value of 1 at the end of four years at a certain effective rate of interest, and the present value of 1 to be paid at the end of four years at an effective rate of discount numerically equal to I is 2.0098 Find the rate

**science**

An airplane flies at 200km/hr. What is the velocity?

**6th grade**

I keep mine on a bookshelf my dad and I built ourselves. I, mine, my, I=pronouns bookshelf, dad=nouns I have to identify all of the nouns, pronouns and adjectives.

**college chemistry**

Calculate the amount of heat required to heat 80 grams of water from 10 to 53°C. The specific heat capacity for water is 4.184 J/g°C.

**math**

1. A baseball diamond is actually a square, 90 feet on each side. What is the distance from third base to first base? 2. The equation gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a) Solve this equation for h b) Mammoth ...

**math**

1. A baseball diamond is actually a square, 90 feet on each side. What is the distance from third base to first base? 2. The equation gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a) Solve this equation for h b) Mammoth ...

**6th grade English**

His special style and powerful performance have long drawn fans to Kenney's music. Would the subject be style and performance and the verb have drawn

**math**

the speed of a train a is 6 mph slower than the speed of train b. train a travels 220 miles in the same time it takes train b to travel 250 miles. find the speed of each train

**math**

i need Help i have no idea how to simplify this expression! x/x+5 + 7x+10/x^2+5x

**world history**

Is this correct? What was Hong Xiuquan famous for? Answer: He was famous for establishing the Taiping Heavenly Kingdom.

**World History**

Can you help me with this question What are the boers famous for?

**science**

why do crickets chirp louder when it is warm. I think it is because they are ectotherms but i really do not know how to explain why. Thanks.

**math**

Can someone please explain this problem to me: I have to use integrals to find volumes with known cross sections but i just don't understand. I have to do a lot of examples for homework like this so can someone show me so I can do my other problems? Thanks! Consider a ...

**math**

Can someone please explain this problem to me: I have to use integrals to find volumes with known cross sections but i just don't understand. Thanks! Consider a solid bounded by y=2ln(x) and y=0.9((x-1)^3). If cross sections taken perpendicular to the x-axis are isosceles ...

**math**

Can someone please explain this problem to me: I have to use integrals to find volumes with known cross sections but i just don't understand. Thanks! Consider a solid bounded by y=2ln(x) and y=0.9((x-1)^3). If cross sections taken perpendicular to the x-axis are isosceles ...

**science**

A skater is coasting alone the ice without sexerting any apparent force. Which law of motion explains the skater's ability to continue moving?

**Science**

After a soccer ball is kicked into the air, what force or forces are acting on it?

**scientific notation**

what is 90,000 in scientific notation

**MATH**

I have math questions I need to check my answers can you please help me 1. 4x4x4x4x4 as a power of 4 answer 4 to the fifth power 2.a bedroom is 10 ft by 11 ft what is the perimeter? answer 42 ft evaluate 72/8-9/3=6 3.Jamal is fencing a rectangular field that measures 25 ft by ...

**MATH**

please check my answers prime factorization of the number 117 =3x3x13 6/25 divided by 2/15=5/9

**literature**

Snowy Woods figurative language used.. "To watch his woods fill up with snow." "He gives his harness bells a shake To ask if there is some mistake. The only other sound's the sweep Of easy wind and downy flake." Road not Taken "Because it was ...

**literature**

No it doesn't look like either poems use figurative language

**literature**

Robert Frost's "The Road Not Taken" and "Stopping by Woods on a Snowy Evening"....how are both poems similar? besides the theme but rhyme scheme, use of figurative language or irony

**English Composition**

Ok. How about...: Students should not be discriminated against other students based on their family's social status and income.

**English Composition**

I'm writing a synthesis paper for my college english composition class. My topic is: The relationship between social class and public education. So far, my thesis: My argument is that students in public education should not be discriminated against based on what social ...

**7th grade input/output patterns**

Determine if each relationship represents a function ×|2|5|8|3| Y|4|5|6|7|

**college**

so it would be Michael has lived in Portland, Oregon; San Francisco, California; and Providence, Rhode Island.

**Ethics Animals Paper**

Yes I'm covering all three areas. haha I know. That's one of my points for this paper too.

**Ethics Animals Paper**

that's true. Animals do have cognition, but they don't have all aspects of it. They think more instinctively than planning for the future.

**Ethics Animals Paper**

Would this be a good introductory paragraph? For several years, there has been an on-going debate over animal rights, animal testing, and where animals fit into our society. Whether or not they have morals, or if it's ethical to test them for the benefit of our own species...

**math**

shouldn't it be 13/25 and then multiply by 100?

**Animal Community Paper (Ethics)**

ok. how about... while society does not view animals as having cognition, therefore placing them outside the moral community, they still do belong and are involved with the human community.

**Animal Community Paper (Ethics)**

Oh and how about the thesis being: While animals lack of cognition denies them acceptance to humanities moral sphere, their status as living creatures prevent us from treating them in a completely unjust manor.

**Animal Community Paper (Ethics)**

THANK YOU!! SO MUCH!!!! :) :) :)

**Animal Community Paper (Ethics)**

Ok. Now, I've never really written an essay before. And I was never taught (high school was a joke). So I'm not sure how to get started with this. And when I looked up on google and other sites how to do this, I was still confused. Any advice?

**Animal Community Paper (Ethics)**

Ok so I need help getting started on my essay. The topic: "Where do animals belong in the moral community? Should animals be seen as only having instrumental worth to humans, or do animals have some intrinsic worth? Should they be given any rights? Is it speciesist to ...

**Intro to Ethics**

oh also, that i don't believe in animal rights, so much as I believe in animal wellfare. I'm curious, how are animals not part of the moral community, when they are a part of the human community and interact with us on a daily basis?

**Intro to Ethics**

Ok. Thank you. So far I'm at the fact that animals do not have any rights, but that they are protected under our laws against abuse and neglect. They should not be given any rights because even though they are sentient intelligent beings, they do not have the human thought...

**Intro to Ethics**

I have to write a paper over an ethics topic. And I chose: Where do animals belong in the moral community? Should animals be seen as only having instrumental worth to humans, or do animals have some intrinsic worth? Should they be given any rights? Is it speciesist to give ...

**Science**

Where can I find a good place where there is alot of info on the northern hemisphere???

**literature**

ok i'll make the changes..thankyou:D

**Literature;Crucible.**

ok. so "breaking of charity" could definitly destroy a community...

**Literature**

ok. all of that helped alot. i will be sure to post up my paragraph as soon as im done :)

**Poetry**

Thanks a lot, though i wanted to find a word that had that w sound in it. tWelve but I don't think there are any so I will use this. Thanks again Guru-MC

**BUS 210**

the answers you seek are in week ones readings. Chapter 2.

**Math**

3*5*7

**5th grade science**

When a boy land on a trampoline, he pushes down on the trampoline. What for is the reaction force? A. gravity pulling the boy down B.the boy pushing down C.the friction between the boy and the trampoline D. the trampoline pushing upward

**chemistry**

What mass of limestone (in kg) would be required to completely neutralize a 15.2 billion-liter lake that is 1.9×10−5 M in sulfuric acid and 8.6×10−6 M in nitric acid?

**chemistry**

What is the maximum mass of aluminum chloride that can be formed when reacting 30.0 g of aluminum with 35.0 g of chlorine?

**social studies (5th grade)**

what effect does trade have with consumer

**Science**

Homer Notices that his shower is covered in a strange green slime. His friend, Barney, tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice, and half with water. After three days of '...

**Language Arts**

lol a LIVING thing

**Language Arts**

wow alot of work

**Language Arts**

What do you have to do and where do you have to go to get a book published? what are the requirements?

**science**

Is it necessary for kittens to get their uterus taken out so that they don't have kids? I mean, is it really bad for them if they don't? and will it hurt the kitten who is getting the operation? *also* is it scientifically proven that if you stay too close to a cat, ...