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Posts by Emma

Total # Posts: 1,725

chemistry
when 130.4 mL of 0.459 mol/L silver nitrate solution is mixed with 85.23mL of 0.251 mol/L aluminum chloride solution, a precipitate of silver chloride forms. Find the mass of this Precipitate.

Chemistry
estimate the heat of vaporization of water if the vapor pressure is 17.54 torr at 20C and 149.4 torr at 60C. R=8.314 J/mole K. I can't remember how to set up the problem. Would someone be able to send me the formula? Thank you

Maths
The vector v has magnitude 17 and makes an angle of 105 with the positive x direction. Express v in terms of components, with i and j being unit vectors pointing in the positive x and y directions.

physical science
Umm, I think I know the answer, give me a second.

statistic in probability
Can you say word for word on what the question is so that I can help you answer it?

statistic in probability
Is the add 12 minutes long?

science
Well, which ever it is it's probably most likely 100m minus 35m or it's 100m plus 35m... (sorry that I can't help much)

science
Is it asking you for the distance from the starting point to where you ended up? (100m - 35m) Or is it asking you for the entire amount that you walked? (100m + 35m)

Chemistry
Two fixed charges, -4μC and -5μC, are separated by a certain distance. If the charges are separated by 20cm, what is the magnitude of the electric field halfway between the charges? My textbook says that the formula for electric field is (kq)/r^2. But Since I have ...

Chemistry
I DNT KNW

civic
ten factor that protect human rights

History
Thank You so much for your help

History
How did the Ming officials manage government when emperors were incompetent? How did this ultimately contribute to the Ming’s decline? Please help me I'm suck on this

history
How did the Ming officials manage government when emperors were incompetent? How did this ultimately contribute to the Ming’s decline?

history
How did this ultimately contribute to the Ming decline? please help me i'm suck on this

physics
A motor car of mass 800kg travelling at 20m/s is brought to rest by brake in 100m.calculate the average braking force required.in physics

physics
A motor car of mass 800kg travelling at 20m/s is brought to rest by brake in 100m.calculate the average braking force required.in physics

Physics PLEASE PLEASE HELP! CONFUSED
I am so lost and confused right now with this question. I might have a quiz. Help me understand before this pop quiz!!!! THANKYOU A diver runs horizontally with a speed of 1.2 m/s off a platform that is 10.0 meters above the water. a) how long before the diver hits the water? ...

True & False explanations Physics
When a projectile is fired at 45 deg. angle and is in free fall, the only point along the path that the acceleration of the object is zero is the instant when the object is at the highest point of its path. Answer: False Can someone explain how? 2.) An object with acceleration...

physics
I don't understand. derive a general equation that will predict the horizontal range of a projectile that is fired from one vertical position and ends at any other vertical position with an initial velocity, V1, at an angle, pheta, from the horizontal. The equation should ...

science help PLS
no it is b

Elementary Math
correct.It can be 6/10

Pre Algebra
how do you find the slope?

Math
Assign a variable to the number of eggs Mia has, say mm. Then, because we are given that Sofia has twice the number of eggs Mia has, Sofia has 2m2m eggs, and Pablo, having three times the number of eggs as Sofia, has 6m6m eggs. For them to all have the same number of eggs, ...

Math
Okay, thanks

Math
I tried again with another question: What percent of 62 is 58? Use the percent equation (which is part=percent times whole) 58=62x Divide 62 on both sides. I rounded to the nearest tenth and got 93.6%

Math
Thank you!

Math
Okay

Math
So when you round it, you get .01 %, right?

Math
Thanks

Math
What percent of 88 is 33? Solve using Percent equation. I solved for x in the equation 33=88x and I got 0.4. Did I do it right?

Math
Find the unit rate then multiply by 31 on both sides of the ratio

Chemistry
A student has placed a mixture of CaO and CaO, 4.88 g of dough into a flask containing 1.46 L of carbon dioxide at 35 ° C and 746 mmHg. After completing the reactions, it found that CO2 pressure had decreased to 353 mmHg.Calcule the percentage composition of the mixture

Science
A 0.44 kg mass at the end of a horizontal spring is displaced 1.5 m and released, then moves in SHM at the end of the spring of force constant 2 N/m. Find the potential energy of the system when the spring is stretched 0.9 m. The acceleration of gravity is 9.8 m/s2 . Answer in...

Science
A 0.44 kg mass at the end of a horizontal spring is displaced 1.5 m and released, then moves in SHM at the end of the spring of force constant 2 N/m. Find the potential energy of the system when the spring is stretched 0.9 m. The acceleration of gravity is 9.8 m/s2 . Answer in...

Physics
An automobile having a mass of 1220 kg is driven into a brick wall in a safety test. The bumper behaves like a spring of constant 2.42 × 106 N/m and compresses 2.99 cm as the car is brought to rest. What was the speed of the car before im- pact, assuming no energy was ...

Chemistry
thanks DrBob222

Chemistry
What volume of air at 1.0 atm and 25 degree Celsius must be taken to an engine to burn 1 gallon of gasoline? Assuming that: 2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O provides reasonable model of the actual combustion process. ( The partial pressure of oxygen in air is 0.21 atm ...

Chemistry
What volume of air at 1.0 atm and 25 degree Celsius must be taken to an engine to burn 1 gallon of gasoline? Assuming that: 2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O provides reasonable model of the actual combustion process. ( The partial pressure of oxygen in air is 0.21 atm ...

English
From 1931 to 1973, the Empire state building was the tallest building, but Burn Khalifa in Dubai now holds the record. Hope that helps

Maths
Can anyone help. What is the rule of the following function? (9-2x)/(5-x)

math
Five eights of Johns money is €367.50 .How much money has John? WAITING for a QUICK answer!!!!!!!

Geometry
In parallelograms TUVW, part of a ceramic tile pattern, angle TUV = (8x + 1) and angle UVW = (12x + 19) find angle TUV

Geometry
I got it thank you :)

Geometry
Yes it is

Geometry
Three interior angles of a convex heptagon measure 125 degrees, and two of the interior angles measure 143 degrees. Which are possible measures for the other two interior angles of the heptagon? 1: 48 and 48 degrees 2: 39 and 100 degrees 3: 100 and 116 degrees 4: 89 and 150 ...

educational technology and learning
Correct I got 100%

ENGLISH
my country Nigeria

Math
the terminal side of an angle in standard position coincides with the line x-2y=0, what is the cosine to the nearest ten-thousandth??? I am completely lost with this one

Math
the terminal side of an angle in standard position coincides with the line x-2y=0 in quadrant 3, find cosine theta to the nearest ten-thousandth

Math
You would multiply denominator and the whole number then add that product to the numerator. You would then get an improper fraction and divide the numerator from the denominator to get a rational number.

English
The school did, its in our English book but it isn't opening the book, it just goes to a plain white screen so I think the site is just down since its still winter break. Thank you though, I'll try to go to the library to get it :)

English
I have to read the book 'Nethergrave' by Gloria Skurzynski, but the online book doesn't seem to want to open on either of my computers so I assume the site is down. Does anyone know where I could find the book somewhere else online, I've been searching google ...

AP LANG
Any nonfiction book recommendations about language as a key to identity?

English
I've already went through a few pages but the definition my lesson gave me was different than the ones that are mentioned in the ones I saw. I have that it means 'the philosophy that the actions of a person are predetermined by factors outside of him or her' but ...

English
I am writing a paper for The Red Badge of Courage and it says to talk about naturalism and where it was represented in the book and I'm having a bit of trouble. I understand what naturalism is and everything, I just can't find an example from the book where it was ...

physics Hello?
anyone strong in physics, help would be awesome

physics
M1.) Nguyen jumps off a cliff with a height of 100 meters at a velocity of 3.5 meters per second to a save a cat. How long will it take her to reach the surface of the ocean? A3.) A plane vertically flees a horde of zombies at a speed of 7.9 m/s at a height of 230m above the ...

Physics! I just need confirmation on my answer. Is this correct?
So is T= 2.03 and is the Distance/ Final velocity= 60.9 m/s ??? So to answer the question: How far away should the truck be when he jumps in order for him to land in the bed?... So.. the answer in terms of how far away the truck should be is 60.9 meters/ second away it is?

Physics!
INITIAL POSITION x1= 10m FINAL POSITION x2= 0 m INITIAL VELOCITY v1= 5 m/s FINAL VELOCITY v2=? ACCELERATION a= -9.8 m/s^2 TIME t=? Are these numbers put in the proper place? I'm confused on this part before I get towards the end..

Physics!
A person is standing on a 10-m bridge above a road. He wants to jump from the bridge and land in the bed of a truck that is approaching him at 30 m/s. In order to clear the bridge railing, he has to jump upward initially with a speed of 5 m/s. How far away should the truck be ...

PHYSICS! Really Confused! Test Tmrw
I have to submit before 6 pm 12/17/15. I am super confused and I have another test. Someone help show the steps and simplify what to do. Much appreciated!!

PHYSICS! Really Confused! Test Tmrw
A person is standing on a 10-m bridge above a road. He wants to jump from the bridge and land in the bed of a truck that is approaching him at 30 m/s. In order to clear the bridge railing, he has to jump upward initially with a speed of 5 m/s. HOW FAR AWAY SHOULD THE TRUCK BE ...

Physics
John, Can you or any others help in my recent question I posted around 4pm?? Here is the question but go to my actual question I posted.... A person is standing on a 10-m bridge above a road. He wants to jump from the bridge and land in the bed of a truck that is approaching ...

Physics
Hey Steve, can you also help my question too? I am Very confused at even how to approach the question.

English
I'm writing about how wedding cakes are high art, so I want to connect how there are tv shows about art competitions and there are tv shows on cake competitions.

English
How can I connect competition and acknowledgement/recognition?

English
Yep :)

English
I'm leaning more towards C. There's nothing in the passage to support A. But C it's giving a comparison to why we should preserve these animals.

Art
You're expressing yourself in ways you wouldn't normally do.

physicsHELP!!!!
HELP!!!

physicsHelp!!!
so what do I put into the equation : vf^2=vi^2+2ad solve for a. I'm confused on the question how many g's ? g=9.80 m/s^2 so wouldn't dividing by 9.8 make the how many g's =0 ZERO?

physicsHELPPLEASE!
I really don't understand how to begin with this question. Struggling at the moment. Any help would be much appreciated!!!!

physics
2.) A sports car is advertised to be able to stop in a distance of 50m from a speed of 90 km/h. What is its acceleration in m/s^2? How many g's is this (g=9.80 m/s^2)

Physics
Using proper formulas, how do you go about with this question... really confused 1.) A sprinter accelerates from rest to 10.0m/s in 1.35s. What is her acceleration (a) in m/s^2 and (b) in km/h^2? 2.) A sports car is advertised to be able to stop in a distance of 50m from a ...

English
Yes, this is the whole sentence "Those who make up Putin’s audience are so diverse in their views that it is hard to generalize about them, but some are likely to object on the grounds that Putin is simply asking Americans to not attack Syria for genuine reasons."

English
How can I rephrase this so it's not a run-on? but some are likely to object on the grounds that Putin is simply asking Americans to not attack Syria for genuine reasons

English
He uses logical fallacies such as slippery slope to show what freedom can lead to. He also uses argument from motives to show what communism can lead to.

English
I am writing and essay about corrupt language and my claim is "Ronald Reagan uses corrupt language in his speech, Tear Down This Wall to convince the people of Berlin that communism is bad." What would my counterclaim be?

English & Comp
Alright. Thankyou so much for the best possible help. I'll be sure to do that.

English & Comp
Sorry to be confusing. I apologize; however, my teacher is a top notch teacher but this still doesn't make sense

English & Comp
Then it doesn't make sense if my teacher is saying to "Create compound sentences that make a general statement and follows with specific details/ create expectation and fulfill it." Of course compound sentences are joined by a Semi-Colon

English & Comp
I understand using colons when having a list, but I think my teacher is saying to combine 2 Compound Sentences using a colon but the sentences are general statements and follows with specific details or creates expectations and fulfills it. Idk of an example that would be best...

English & Comp HELP
Can someone break this down because these examples are not helpful

English & Comp
For our "Colon" (:) assignment, my teacher asked us to create a compound sentence that makes a general statement and follows with specific details/ create expectations and fulfills it. But How do you do that using Colons?.. A simple example would help me out. Much ...

Math
1)Carson lost 5 pounds in one week. What property is used in this situation? Why? 2)Frankie wanted to buy a new hat for $14, but left the store without buying anything. What property is used in this situation? Why?

Math
The hot air balloon operator allows the balloon to descend at a rate of 23 ft per minute. If they have been descending for 6 minutes how far has the balloon descended?

English & composition
We had to find rhetorical devices in this speech from a movie Lean On Me: I spotted personification, rhetorical question, and anaphora only. **Our teacher gave us a list of rhetorical devices that we could find but I can't find: ethos, pathos, logos, parallelism, simile, ...

Language
HELP ME PLEASE!!! In "All Together Now," why does Barbara Jordan most likely mention the conflict in Bosnia? It shows that people of different ethnic backgrounds can live in peace. It shows that improvements in race relations are still necessary despite past ...

Language
In "All Together Now," why does Barbara Jordan most likely mention the conflict in Bosnia? A.It shows that people of different ethnic backgrounds can live in peace. B.It shows that improvements in race relations are still necessary despite past progress. C.It shows ...

English
I have to include the following rhetorical appeals but idk if this is ok and i'm stuck on including ethos... Ethos: trustworthiness or credibility Logos: logic, data Pathos: emotion ___________________________________________________ Here's my sentence: Maddy persuades...

Algebra
I thank you for the explanation, not so much the sarcasm. Reason I didn't just divide was because my teacher had said it was more than just division. But thanks for the help! ♥

Algebra
Use synthetic division to find P(3) for P(x) = x^4 - 6x^3 - 4x^2 - 6x - 2 I don't know how to solve this, can someone explain how please?

Work Environments
Why is emotional intelligence an important factor in individual motivation in work environments?

physics
How does the concept of resonance work?

Physics
How does using the concept of resonance determine the speed of sound an in experiment? In other words, I'm wondering how the concept of resonance works

Physics
How does using the concept of resonance determine the speed of sound an in experiment? In other words, I'm wondering how the concept of resonance works

Algebra
A person invested $7000 for 1 year, part at 5%, part at 10%, and the remainder at 15%. The total annual income from these investments was $815. The amount of money invested at 15% was $200 more than the amount invested at 5% and 10% combined. Find the amount invested at each ...

Algebra
A person invested $7000 for 1 year, part at 5%, part at 10%, and the remainder at 15%. The total annual income from these investments was $815. The amount of money invested at 15% was $200 more than the amount invested at 5% and 10% combined. Find the amount invested at each ...

Calculus
find the maximum volume of a cylinder whose height and radius do not exceed a combined total of 12cm

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