Posts by ANONYMOUS

Total # Posts: 114,163

Chemistry
A sample of hydrogen gas at a pressure of 0.694 atm and a temperature of 271 °C, occupies a volume of 417 mL. If the gas is heated at constant pressure until its volume is 626 mL, the temperature of the gas sample in °C will be? I got 407 °C but it says that is ...

Chemistry
A person accidentally swallows a drop of liquid oxygen, O2 (l), which has a density of 1.149 g/mL. Assuming the drop has a volume of 0.050 mL, what volume (mL) of gas will be produced in the person’s stomach at body temperature (37 °C) and a pressure of 1.0 atm?

CHEMISTRY
This is what I did deltaHc(reaction)=deltaHc(products)-deltaHc(reactants) deltaHc(reaction)=(1mol(2(732kJ/mol))+1mol(2(460kJ/mol)))-(1mol(4(410kJ/mol))+1mol(498kJ/mol))=246kJ/mol I also did this deltaHc(reaction)=-deltaHc(products)+deltaHc(reactants) deltaHc(reaction)=-(1mol(2...

CHEMISTRY
Estimate the enthalpy of combustion of methane in kJ.mol^-1 CH4(g) + 2O2(g) ------> CO2(g) + 2H2O(g) Bond Dissociation Enthalpies /kJ.mol^-1 Single Bonds Double Bonds C C 350 C O 732 C H 410 O O 498 O H 460 C O 350 O O 180 A. 668 B. 540 C. –540 D. –668 (CORRECT ...

English
Who's Juliet in Romeo and Juliet?

Chemistry
A coffee cup calorimeter contains 480.0 grams of water at 25.0 oC. To it are added: 380.0 grams of water at 53.5 oC 525 grams of water at 65.5 oC Consider the heat absorbed by the Styrofoam as negligible, calculate the expected final temperaturein oC A. 38.2 oC B. 88.7 oC C. ...

Chemistry
This question is from grade 12 university preparation level. The answer has to do something with rates of chemical reactions but I don't know what the answer is. . When hydrogen peroxide H2O2 is used as an antiseptic on open wounds, bubbles form as a result of the ...

math
!@#$%^&

math
Factor this expression completely, then place the factors in the proper location on the grid. y 3 - 27

Biology
Is this the correct order for what appears on earth first? Fish, Amphibians, Reptiles, Dinosaurs, Birds.

Biology
is this the correct order for what appears first: Dinosaurs, Reptiles, Amphibians, Birds, Fish

history
how do I describe Benjamin Franklin in the context of the colony of Georgia

Biology
Name and briefly describe two traits that amphibians and reptiles share that are not common to all vertebrates

math
Ingrid offered to pay her brother $2 for doing her share of the housework each day, but fined him $5 if he forgot to do it. After 4 weeks, Ingrid discovered that she did not owe her brother any money. For how many days did Ingrid’s brother do her share of the housework?

math
Use: A = P(1-R)^n 80000(1-5.97%/4)^82 we get n (82) from: 4*20years + 4*6months = 24months/2years quarterly = 4 parts (of a year) Type that into a calculator and you should get your answer.

math
omg, im so stupid, i thought it meant how much money he makes.. thanks so much

math
11. Samir wants to purchase his first car. He has saved $1000 as a deposit but the cost of the car is $5000. Samir takes out a loan from the bank to cover the balance of the car plus $600 worth of on-road costs. a. How much will Samir need to borrow from the bank? $4600 b. ...

SS helppp
Yay! Thanks Ms Sue got them all right:)

SS helppp-Ms Sue
??Ms Sue

SS helppp
is 3 and 4 C?

SS helppp
Ok and the other ones?

SS helppp
I think 1 is B and 2 is A am I right?

SS helppp
1. Kurds live in all of the following independent nations except A.Iraq. B.Kurdistan. C.Iran. D.Turkey. 2. How were Kurdish people generally treated during the twentieth century? A.Governments treated them poorly, especially in Iraq and Turkey. B.They were mostly left alone ...

English
But do not use mine, use yours, like "left" :)

English
I have a right to go. We drive on the right here. You are absolutely right.

English
right :)

Pre-Algebra Help
wel 8/13 = ??? = 2.4/5.2 ??? 8/13 and 24/52 8/13 * 3/3 = 24/39 NO way

can not help
I can not see your picture. Are all angles the same?

Physics
weight = normal force = m g = 33.8 * 9.81 = 332 N friction force = 0.12 * 332 = 39.8 N so net force forward = 80.5 - 39.8 = 40.7 N a = 40.7/33.8 d = (1/2) a t^2

math
I'll give the full part: Investment A: Rate as 'R,' principal as $8000, time as '4 years,' and interest as 'SI' Investment B: Rate as 'R,' principal as $7000, time as '5 years,' and interest as 'SI' Investment A's Rate ...

math
Does anyone know how to find the rate with ONLY principal and time? (no interest) Refer to this: Investment A: Rate as 'R,' principal as $8000, time as '4 years,' and interest as 'SI'

Math
Interest = (20 * 3 * 2)/100

financial - simple interest
rate principal time S interest investment A rA $8000 4yrs SI A investment B rB $7000 5yrs SI B It is known that rA : rB = 2 : 3 and that investment B earned $2000 more interest than investment A. Find the values of rA, rB, SI A and SI B

math?
Newton uses a credit card with a 18.6% APR, compounded monthly, to pay for a cruise totaling $1,920.96. He can pay $720 per month on the card. What will the total cost of this purchase be?

Math
yeezycopdropnebba

Math
What percentage of 50 is 12.5 A. 4% B. 25% C. 40% D. 15%

Chemistry
Liquid methylene iodide has a density of 3.33 g/mL. A barometer is constructed using methylene iodide instead of mercury. If the atmospheric pressure is 0.951 atm, what is the height of the methylene iodide column in the barometer in cm? The density of liquid mercury is 13.6 g/mL

English
The crowd cheered loudly

Math
20+20

maths
to fence an area which is in circular shape with a wire of 100m in perimeter . find the maximum area using the 100 metres wire

Math
Pablo found that his uncle’s age can be divided by three different prime numbers. What are three possible ages of his uncle? Show your work.

Marh
5 males

Math
These statements describe the depth at which two sea creatures are swimming. Note that sea level is equal to zero. The six-gill shark is swimming 8,200 feet below sea level. The fangtooth fish is swimming 6,500 feet below sea level. Complete this sentence. The six-gill shark ...

math
Why does pie go on forever? Why is it called pie?

Calculus
Suppose that f(x) and k(x) are differentiable everywhere and that f(3) = 5, f'(3) = 7, k(3) = 6, and k'(3) = 9. Find an equation of a tangent line to 3(f(x))^2 at x = 3. So the derivative of 3(f(x))^2 is 6f(x)*f'(x), and 6f(3)*f'(3) is 210. But for the tangent ...

sama school
what does the animal look like

physics
Anna pushes horizontally on a 57 kg penguin with force of 19 N, but the penguin does not budge. Find the force of static friction between the penguin’s feet and the ground.

Liberal are maths
A jar contains 36 marbles if has 20 red 12 black and 4 green marbles two marbles are draw the first is not returned before the second one is drawn what is the probability that both marbles are red

Chemistry
A compound is 85.6% carbon by mass. The rest is hydrogen. When 10.0 g of the compound is evaporated at 50.0 ?C, the vapor occupies 6.30 L at 1.00 atm pressure. What is the molecular formula of the compound?

Physics
A hula Hoop (I=1/2MR^2) rolls without sliding along the floor. The ratio of its translational kinetic energy to its rotational kinetic energy (about an axis through its center of mass) is: A. 1 B. 2 C. 3 D. 1/2

World geography
Which term below does not describe a world climate region? A: tropical B:polar C:continental D:inland In a humid continental climate region, to what conditions would plants and animals have to be adapted? A:cool summers and very cold winters B: mild summers and winters C:warm ...

Spanish
oh okay. Thank you

Spanish
Write a short paragraph explaining some details about school practices and/or activities in schools in the Spanish-speaking world. I am a bit confused about what they mean for the activities, do they want after school Spanish activities or what?

Math
nvm. I go the answer already. TY

Hardy Weinberg: Biology
a, p=0.38 b, 2pq=0.48, 0.48*180=87

Math
Thank you so much, Ms. Sue! I will write down if you are correct or incorrect after I finish the test. :D

Math
CHECK AND CORRECT MY ANSWERS!! PLEASE!!:D:D Write the ratio in the simplest form. 45:15 9:3 3:1*** 1:3 4:1 Solve the following proportion. (solve p) p/3 = 8/12 2*** 8 12 24 A recipe calls for 3 cups of flour to make 3 dozen cookies. Use the proportion to calculate how much ...

Calculus
Ty

History
Mr. Hunt lived in Ohio in 1843. He was concerned about the amount of federal debt. What would have been Mr. Hunt's view of Texas joining the United States

Math
1b 2d 3a

math
Oh, my bad Reiny, I won't do it again. Sorry :(

Honors English 9
Thank you!

Honors English 9
The symbol of the flag wavering in the beginning and Henry carrying it to the front of a later battle best supports which of the following themes in The Red Badge of Courage? a) honor and reputation *** b) the definition of courage c) growing from a boy into a man d) the ...

science
the seperation between hydrogen and chlorine atoms in the hydrogen chloride molecule is about 0.13 mm. the distance of center of mass of HCL molecule from hydrogen is

Georgia State History
What is a compromise? Explain why a compromise was necessary at the Constitutional Convention to agree on the structure of the new American Government. (Answer the questions below) One group of delegates believed: They believed the convention would break up. /!\ Another group ...

Juvenile Justice
That makes sense. Thank you

Juvenile Justice
Hello Ms. Sue, I know that overall the maximum sentence is life without the possibility of parole (LWOP), which it is my understanding is usually (if not always?) sentenced in adult criminal court. So, then I guess my question is can a juvenile court give LWOP to a juvenile? ...

Juvenile Justice
What is the maximum sentence a juvenile court can give to a juvenile?

Math
Every exponential function is strictly increasing. True or false? Explain

Math
What is 2/10+13/100=

Physics
A wild horse starts from rest and runs

Physics
A wild horse starts from rest and runs

chemistry
How much 10.0 M HNO3 must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the pH to 5.05 help please :(

Chemsitry
Write the chemical reaction that is responsible for the pH of a buffer which contains NH3 and NH4Cl. Write the reaction in such a way that is appropriate for a Ka. Thank you!

Chemistry
122.5 grams/mol for KClO3 so we have 53/122.5 = .433 mols of KClO3 for every 2 mols of KClO3 we get 3 mols of O2 (3/2) (.433) = .649 mols of O2 If at STP then about 22.4 liters/mol so .649 * 22.4 = 4.5 liters agreed b).433 mols of KClO3 ---> .433 mols of KCl = 74.5 g/mol ....

Physics
1.08*10^-23 m/s = .108 * 10^22 = .0108 * 10^-21 =.00108 * 10^20 :) divide the left by ten if you multiply the right by 10

Estimating the product of decimal and a whole numb
How did you get 25 on 0.56 × 48

Estimating thevpriduct of decimal and a whole numb
31.04 × 300 0.56×48 47.2× 93

Williamson Reaction- CHEM
What would be the fate of any unreacted NaOEt reactant, ie. where does it end up, would it be a contaminant in the crude product or would it be removed, if so how (explain your answer)?

physics
A uniform metre rule of mass 90g is pivoted at the 40cm mark. If the rule is in equilibrium with an unknown mass market placed at the 10cm mark and a 72g at the 70cm mark,determine m.

physics
Internal energy for real gas

physics
Internal energy for real gas

Math PLz Help
I need to find the coordinates of vwxy with a scale factor of two could you please help I have tried every way. V(6,2) W(-2,4) X(-3,-2) Y(3,-5)

Math PLz Help
I need help figuring out this problem I have tried everything but cannot get the answer. I have to find the coordinates of a qualiteral using vwxy after a scale factor of two Here are the The coordinates V (6,2), W(-2,4) X(-3,-2) Y(3,-5) PLease help me find the coordinates ...

Chemistry
write the reaction equation for the formation of CN2H2 (s) from the elements in their standard state.

Pre-Calc
If a pilot wants to travel 400 mph at a bearing of 80, what should he set his speed and bearing to counteract a wind blowing at 50 mph coming directly from South?

Pre-Calc
Two farmers were plowing along the edges of a triangular cornfield. They both started at the same corner of the field. The first farmer plowed directly West for 0.5 miles and then stopped. The second farmer doesn't know how far she traveled, but she knows it was N45E at a ...

Calculus
A piece of wire 15 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle.

Math
Box A contains six white marbles and five black marbles. Box B contains three white marbles and four black marbles. An experiment consists of first selecting a marble at random from Box A. The marble is transferred to Box B and then a second marble is drawn from Box B. What is...

science
If ozone mixing ratios are 0.24 ppmv and ROG mixing ratios are 1.7 ppmC, what is the best an most effective regulatory method of reducing ozone if only the effects of NOx(g)and ROGs on ozone are considered?

science
Why are the coldest temperatures at the 50 km height from the surface of the Earth, occur generally at tropical tropopause?

Math
20 minutes is 1/3 hour So, Ivan had gone 16/3 = 5 1/3 miles

math
surely your algebra text explains this. and google will provide lots of references much more complete than we can provide in a short post here.

Math
The next morning, Kevin meets with a client who would like to invest $20,000 into an account that pays 3.2% interest, which is compounded annually. How much money is in the account after 5 years if no withdrawals or additional deposits are made?

Math
That is wrong

Algebra
This year, Village Realty sold 280 homes. Last year they sold 350 homes. If their sales decrease by the same percent next year, how many homes can Village Realty expect to sell next year?

ss
How were the lives of children in the middle of the nineteenth century different from previous generations? A. they were working in factories or fields B. they were children of professional parents C they were given the opportunity to go to college D. they were able to read ...

Chemistry
Calculate the number of moles of calcium chloride Cacl2 that can be obtained from 25g of limestone CaCo3 in the presence of excess hydrogen chloride

Physics
A 60-kg person begins to accelerate upwards on an elevator at a rate of 3 m/s^2. What does the scale read at this time? My answer: 768 N

Math
This also works with division for future reference.

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