Post a New Question

Posts by Owen

Total # Posts: 68

chemistry
2. 50.0 mL of 1 M NaOH(aq) and 50.0 mL of 1 M HNO3(aq), both initially at 18.6°C, were mixed in a Styrofoam cup calorimeter. The temperature of the solution rose to 25.4°C. How much heat was released? Assume that the heat capacity and density of the solution are the ...

Social Studies
I am doing a character sketch of James I. Is this ok?? Intelligent man who always did the wrong thing. He did not make good impressions on people. His habits were that he was slovenly and he had a big tongue. He enjoyed angering the Puritans. He encouraged people to play games...

Social Studies
thanks

Social Studies
Could someone give me a character sketch of James I???

Science
If you place a grape in a large amount of sugar water, what will happen to it and why?

math
I have ten,ones and tenths.My digits are next door numbers and they add up to 9. What number am I?

Math
An expression is (195x) dollars. 1.the total cost (in dollars) of adopting one dog For other people looking for an answer. :)

math
Larry and his sister, Betty, are saving money to buy their own laptop computers. Larry has $215 and can save $35 each week. Betty has $380 and can save $20 each week, When will Larry and Betty have the same amount of money?

Math
Javier ate 1/5 ok bag of popcorn . She shared the rest with enrique. List three ways they could have shared the remaining popcorn

trig
Two ships leave port at the same time and travel straight line distances, the first at 30 km/h and the second at 10 km/h. Two hours later they are 50 km apart. What is the angle between their courses?

Chemistry
What is the maximum mass of copper(ii) sulphate pentahydrate, CuSO4.5H2O, which could be obtained by crystallizing the solution? Ar: H=1; O=16; S=32; Cu=63.5 I'm not looking for someone to do it all, although that would help. Just that someone could give me guidance and ...

precalc
solve. give the answers so that 0 ≤ x < 2π. 1) sin x + 4 = 5 csc x answer: π/2 2) 3 csc x + 15 = 0 answer: -.20 are my answers correct?

precalc
is the answer to #3 39°?

precalc
Solve. Give the answers in degrees so that 0° ≤ θ < 360°. 1) (5 cos θ - 1) / 2 = 1 answers: 53°, 127°, 233° 2) 3 cot (2θ) + 3 = 0 3) tan^2 θ + 2 sec^2 θ = 3 is my answer for #1 correct and i'm not sure how to do #2 and #3.

CHEMISTRY !!!
What is the pH of a 0.16M KHSO3 solution at 298 K? a. 4.41 b. 1.31 c. 7.00 d. 1.82 e. 3.89 I did the calculations and my answer came out to be 3.89 but apparently the answer is 4.41. Can anybody explain why ? Thnx in advance

science
It's a reaction between two elements, so it's chemical.

Chemistry
Use dimensional analysis. You have the rate at which the water drops and you a set time figure out how to implement them in your calculation. And did you by any chance mean milliliter* not millimeter ?

CHEMISTRY
You have 875 mL of an 0.53 M acetic acid solution. What volume (V) of 1.30 M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.94? (The pKa of acetic acid is 4.76.)

CHEMISTRY
A 70.0 mL solution of 0.165 M potassium alaninate (H2NC2H5CO2K) is titrated with 0.165 M HCl. The pKa values for the amino acid alanine are 2.344 (pKa1) and 9.868 (pKa2), which correspond to the carboxylic acid and amino groups, respectively. Calculate pH of second equivalence...

CHEMISTRY !!! HELP !
A 70.0 mL solution of 0.165 M potassium alaninate (H2NC2H5CO2K) is titrated with 0.165 M HCl. The pKa values for the amino acid alanine are 2.344 (pKa1) and 9.868 (pKa2), which correspond to the carboxylic acid and amino groups, respectively. Calculate pH of second equivalence...

CHEMISTRY !!! HELP !
You have 875 mL of an 0.53 M acetic acid solution. What volume (V) of 1.30 M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.94? (The pKa of acetic acid is 4.76.)

CHEMISTRY !!! HELP !
Nevermind, I figured out what I was doing wrong. Thnx

CHEMISTRY !!! HELP !
Calculate the pH of the solution after the addition of the following amounts of 0.0617 M HNO3 to a 70.0 mL solution of 0.0750 M aziridine. The pKa of aziridinium is 8.04. 1)Volume of HNO3 equal to the equivalence point 2)89.5mL of HNO3 I got pH= 7.37 for 1 but i believe I ...

CHEMISTRY !!! HELP !
OHH Great !!! It makes much more sense now.Thanks !

CHEMISTRY !!! HELP !
.5*.12=.06 mols NaOH .595*.25=.14875 mols Acid (.14875)/(1.095)=.1358M Acid (.06/1.095)=.05479M NaOH pH=4.53+log(base/acid)=4.14

CHEMISTRY !!! HELP !
500.0 mL of 0.120 M NaOH is added to 595 mL of 0.250 M weak acid (Ka = 2.95 × 10-5). What is the pH of the resulting buffer? The answer that i got using HH equation is 4.14 but apparently it's wrong. Am I approaching this problem from a different angle ?

Math
You just divide the total money paid by 13.50 which is the amount paid per ft^2 and that will be your area.

Chemistry ! Need help.
A buffer prepared by dissolving oxalic acid dihydrate (H2C2O4·2H2O) and disodium oxalate (Na2C2O4) in 1.00 L of water has a pH of 5.007. How many grams of oxalic acid dihydrate (MW = 126.07 g/mol) and disodium oxalate (MW = 133.99 g/mol) were required to prepare this ...

SS Help!!
Thanks 100% latifa

math
In order to estimate the height 'h' of a tall pine tree, a student places a mirror on the ground and stands where she can see the top of the tree. The student is 6 feet tall and stands 3 feet from the mirror which is 11 feet from the base of the tree. Another student ...

phsics
A ball is rotating in a horizontal circle at the end of a string of length 3.8 m at an angular velocity of 8.5 rad/s. The string is gradually shortened to 3.3 m without any force being exerted in the direction of the ball’s motion. Find the new angular velocity of the ...

Algebra Help! Please
4x-2=4x-2 0=0

Science--PLEASE CHECK!
I would say that the answer is b, although I'm not quite sure..

math 3
24000 cu cm

math
250

Math ASAP please
Yup 100% boPy C D D C

Physics
A 6 uF capacitor is initially charged to 100V and then connected across a 600 ohm resistor. a) what is the initial charge on the capacitor?

Math
26!!!

Science
A radioactive substance is found to register 1000 counts per second on a Geiger counter. Twenty-four hours later it registers 125 counts per second. What is its half-life?

Science
If a 20 gram sample of a radioactive substance has a half-life of 6000 years, how many grams would be present after 18000 years?

Physics
An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

math
if you are playing a game to toss a ball in a basket through a target what is the probability that you will win?

Physics
the input and output of hydraulic jack are respectively 1 cm and 4 cm in diameter. A lever with a mechanical advantage of 6 is used to apply force to the input piston. How much mass can the jack lift if a force of 180 N is applied to the lever and efficiency is 80%

computer literacy
what is an application program included with Windows that allows the contents of the computer, the hierarchy of folders on the computer, and the files and folders in each folder to be viewed?

physics
two uniform cylinders have different masses and different rotational inertias.they simultaneously start from rest at top of an inclined plane and rool without sliding down the plane.the cylinder that gets to the bottom first is?

physics
for a body to be in equillibrium under the combined action of several forces

physics
for an object in equillibrium the net torque acting on it vanishes only if each torque is calculated about?

physics
the conditions that the net force and the net torque both vanish?

Spanish1 help
Trabajas

geometry
each leg of an octagon is 48" what is the diameter?

Social Studies
What group of people did the black plague benefit in england and the surrounding aread?

math
What is $1500 with 7% of tax?

math
yep got it now--6395

math
4 digit number. numeral in tens place 3 times the numeral in hundreds place. numeral in my ones place is 2 more than numeral in hundreds place. numeral in thousands place is 3 less than number in tens place. number in hundreds place is 3. what is number?

math
other clues are tens digit is 1 less than thousands and tens digit is 2 more than ones

Changes in Matter
I need help what is the answer🤔

US hISTORY
What did Washington do with his slaves at the end of his presidency?

SCIENCE
The membrane around the vacuole biological term

math
^^same

Science
Wow, That Lawrence guy needs to keep his day job! Haha. Thanks for your help.

Science
Sweet, I hope I get an A+!!

Science
Why is it that milk sours so fast. I had googled it and false imformation has came up. I have to write a 3 page essay about how certain things sour too quickly.

Social Studies
I've seen the the nationalgeographic one. Yes, I know that no one knows. It's just that i came to this site to find out that he didn't kill himself. My teacher got into an argument with my S.S. teacher. They were practically yelling. Thank you for your help.

Prayer Request
please pray for owen and daralyn to get back together as a family and have a,good life together. and to be in love always,

Prayer Request
That dee and owen can be together again as a famliy and live a good life.

math riddle ALGEBRA WITH PIZZAZZ
what is green and makes holes a drill pickle

Human Biology
How can you identify a desert animal from an aquatic one by looking at the kidneys. I meant to put a question at the end. Morphological study of the desert heteromyid kidney with emphasis on the genus Perognathus. * Altschuler EM, * Nagle RB, * Braun EJ, * Lindstedt SL, * ...

the big idea of energy
what is it? I'm baffled. I am doing it have to include in my essay on the digestive system!!

  1. Pages:
  2. 1

Post a New Question