Monday
May 30, 2016

Posts by Sidney

Total # Posts: 125

Chemistry
What is the pH of a 0.05 M solution of acetic acid knowing that it was 2% ionized
May 28, 2016

Chemistry
Thank you so much! you save my life
May 28, 2016

Chemistry
Calculate the pH of a solution prepared by dissolving 10.0 g of tris(hydroxymethyl)aminomethane ("tris base") plus 10.0 g of tris hydrochloride in 0.250 L of water. (a) What will be the pH if 10.5 mL of 0.500 M NaOH is added?
May 28, 2016

Chemistry
yes! Given 100 mL of pure water at 4°C, what volume of a solution of hydrochloric acid, with a density of 1.175 g/mL and containing 34.4% HCI by weight, could be prepared?
May 22, 2016

Chemistry
Given 100 mL of pure water at 40C, what volume of a solution of hydrochloric acid, with a density of 1.175 g/mL and containing 34.4% HCI by weight, could be prepared?
May 22, 2016

History: Constitution
Thanks
March 19, 2016

History: Constitution
Help on writing thesis: Would you have been a Federalist or Anti-Federalist? Explain your response using specific information about the ratification of the Constitution, the Bill of Rights, the Articles of Confederation, the size of the nation, and power of the thirteen states.
March 19, 2016

Math
The circumference of a circular stage is 157 feet. If Chris paints the stage at a rate of 400 square feet per hour, how long would it take to the nearest hour, for Chris to paint the entire stage?
March 17, 2016

Math
I forgot to add that I'm sorry! I meant t o type Find the value of the car ($18,000) so it's actually A new car typically loses 20% of its initial value during the first year. During the second year, the car loses 15% of its value after the first year. Find the value ...
March 17, 2016

Math
A new car typically loses 20% of its initial value during the first year. During the second year, the car loses 15% of its value after the first year. Find the value of the car after the first year and after the second year.
March 17, 2016

Math
Scott started to read a novel. He read 21 pages a day. After 7 days, he had 5/8 of the book left. How many pages are there in the book?
February 25, 2016

Math
Wanda wants to have a test average of 90 her four science tests. On the first three tests, she got scores of 84, 96, and 85. What does she need on her last test to reach her goal?
February 25, 2016

Math
On a roadmap, the distance between two cities is 8.6 centimeters. What is the actual distance if the scale on the map is 2 centimeters to 50 miles? A - 25 miles B - 215 miles C - 430 miles D - 860 miles
February 25, 2016

Math
It will be 5 years. Correct?
February 25, 2016

Math
Nicole deposited $2,000 at 6% simple interest. How long will it be before she has $2,600 in her account? F. 4 Years G. 5 Years H. 6 Years J. 7 Years
February 25, 2016

Math
If you triple a number you will have one half the number of hours in two days. What is the number?
February 24, 2016

Math
Scott started to read a novel. He read 21 pages a day. After 7 days, he had 5/8 of the book left. How many pages are there in the book?
February 24, 2016

Math
There are 28 7th graders in Ms. Thomas's homeroom. Seven of the students are absent today. What percent of the class was absent?
February 18, 2016

Math
Adriana opens her own book store. She sells a hard cover book for $18 and a paperback for $8. Comic books cost $6.50. Adriana's goal is to earn no less than $50. How many comic books must she sell?
February 18, 2016

Math
Two numbers are in the ratio 20:12. Their sum is 160. What are the two numbers?
February 16, 2016

Social Studies
She wrote about violent crimes against African Americans
February 15, 2016

Social Studies
Why does Ida B. Wells write under the pseudonym ''Iola'' for her editorials?
February 15, 2016

Math
Thanks! Makes sense now.
February 11, 2016

Math
To promote the launch of a new Cadbury's chocolate bar, they are offering a ''buy four, get one free,'' deal. If each chocolate bar costs thirty cents, how much would ten chocolate bars cost?
February 11, 2016

Math
40 + (0.5 * 40) = 60 pounds because 0.5 * 40 = 20 and 20 + 40 = 60 Correct?
February 11, 2016

Math
A turkey weighs 40 pounds plus half of its weight. What does it weigh?
February 11, 2016

Math
Ok
January 14, 2016

Math
At Jefferson School, both 6th grade & 7th grade classes take a math test. The average score for the 6th grade is 80 and for the 7th grade is 90. If there are twice as many students, in the 7th grade as there is in the 6th grade, what is the average test score for both grades ...
January 14, 2016

Math
The three Smith children have a combined age of 50. The youngest is half as old as the oldest. Ten years ago, the oldest was 7 times as the youngest. How old were the children ten years ago? (3 answers) I don't know if this is correct, can you help? Youngest: 2 years old ...
January 14, 2016

chemistry 101
The value of kp at 20°c for the reaction 2NO(g) + Cl2(g) 2NOCl(g) is 1.9x10^3 atm-1 calculate the value of KC at the same temperature.
December 4, 2015

Science
I think its ability to react
December 3, 2015

physical science
how does a heat pump prove the law of conservation of energy?
October 23, 2015

American History
ok
October 22, 2015

American History
whats the answer
October 22, 2015

American History
What caused President Richard Nixon to act on environmental issues? A. Nixon had always been an environmentalist. B. The environmental protection movement was supported by public. C. The Republican Party supported environmental protections. D. Smog in London killed 12,000 ...
October 22, 2015

physical science
what is the answer
October 22, 2015

physical science
why a purple flower appears purple when white light shines on it.
October 22, 2015

physical science
why the speed of sound is faster in solids than in gases.
October 21, 2015

PLEASE HELP
thanks u so much
October 21, 2015

PLEASE HELP
physical science
October 21, 2015

PLEASE HELP
when an ice cube would still transfer heat to another object it is in contact with.
October 21, 2015

physical science
hermal conductors don’t have to be hot to transfer heat. According to Ch.16, explain a situation when an ice cube would still transfer heat to another object it is in contact with.
October 21, 2015

physical science
Explain how the snowboarder can have both kinetic and potential energy at point B.
October 21, 2015

Grammer
acting with ill-considered haste or boldness.
October 21, 2015

PLEASE HELP
i have been
October 21, 2015

PLEASE HELP
idk how to put a pic on here
October 21, 2015

PLEASE HELP
13. The picture is a model of a nitrogen atom. What is incorrect about the atomic orbital arrangement of electrons in this model?
October 21, 2015

PLEASE HELP
2. If the scientists only performed 1 experiment but it supported their hypothesis, why can it not be considered a theory?
October 21, 2015

PLEASE HELP
how do i find that
October 20, 2015

PLEASE HELP
How much time will it take a car travelling at 88 km/hr (55 mi/hr) to travel 500km?
October 20, 2015

Computer litericy
where did the internet originate?
October 12, 2015

phyical science
whats the answer
October 11, 2015

phyical science
Which of the following phase changes is an endothermic change? A. condensation B. vaporization C. deposition D. freezing
October 11, 2015

phyical science
Boyle’s law states that the volume of a gas is inversely proportional to its pressure if the A. temperature and number of particles are constant. B. temperature reaches absolute zero. C. number of particles decreases. D. temperature and number of particles are doubled.
October 11, 2015

phyical science
Which of the following is NOT a pure substance? A. milk B. oxygen C. water D. carbon dioxide
October 11, 2015

help
Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction? A. CH4 + O → H2O + CO2 B. CH4 + 4O → 2H2O + CO2 C. CH4 + O2 → H2O + CO2 D. CH4 + 2O2 → 2H2O + CO2
October 9, 2015

help
Which two of Harding’s cabinet members worked hard to achieve advancements specifically for businesses? A. Andrew Mellon and Albert Fall B. Charles Forbes and Harry Daugherty C. Andrew Mellon and Herbert Hoover D. Herbert Hoover and Charles Forbes
October 5, 2015

help
Which political party rose to power in Germany during the 1930s? A. the Communist Party B. the Nazi Party C. the Fascist Party D. the Socialist Party
October 5, 2015

help
thanks anyways
October 5, 2015

help
world war 2
October 5, 2015

help
1919-1941
October 5, 2015

help
one minute plz
October 5, 2015

American History
idk it does not say
October 5, 2015

American History
The mixing of plants, animals, and microorganisms that occurred after Europeans arrived in the Americas is known as A. the Columbian Exchange. B. global interdependence. C. triangular trade. D. global mixing.
October 1, 2015

vocabullary
Alienate and Estrange A. Synonyms B. Antonyms C. Neither
September 18, 2015

us history
What is the name for the belief that it was God’s plan for the United States
March 24, 2015

algebra
Tickets are being sold for a theater. Cost for students: 2 dollars. Cost for other people: 5 dollars. The total amount of tickets sold: 250. Total amount of money made: 950. How many of the tickets were sold to the students? To the others?
December 21, 2014

physical science
help
December 20, 2014

health
thats not the answer its A
November 12, 2014

health
thats not the answer
November 12, 2014

Health
it is not d i have done taken the test
November 11, 2014

Health
B is not the answer
October 30, 2014

Physical Science
help
September 13, 2014

Root Words
what the answer?
September 3, 2014

Health
so true
August 23, 2014

American History
A. paying the costs of construction. B. providing loans and land grants. C. paying for the development of faster steam engines. D. bringing laborers from China to work for low wages.
March 26, 2014

American History
Congress supported construction of the transcontinental railroad by
March 26, 2014

Geometry A
Which line has a slope of 3 and passes though the point (-6, -4)?
February 25, 2014

Physics
can you help solve it because i dont understand it
October 23, 2013

Physics
A Ferris wheel is 60 meters in diameter and rotates once every 12.5s. what is the ratio of a person's apparent weight to her real weight (a) at the top, and (b) at the bottom?
October 23, 2013

Math
Martin wants to make a scatter plot comparing the temperature outside with the number of people at the city swimming pool. Which of the following trends would most likely represent the data? A/There is no relationship between the temperature and the number of people at the ...
June 26, 2013

math
hello can someone please explain and help me with this problem
January 24, 2013

health
Grow up
January 2, 2013

Chemistry
Express each result to the correct # of significant figures 1. 8.27 x (4.987 - 4.96) 2. (9.5 + 4.1 +2.8 +3.175)/4 3. (9.125 - 9.02) / 9.125 x 100
August 31, 2012

HEALTH
the answer is B and its right
August 13, 2012

health
no
August 13, 2012

health
the answer is 2/3
August 11, 2012

Senior Project on Japanese
I'm trying to do a senior project on japanese language but it has to be something specific about the language according to my senior project techer. any ideas?
March 21, 2012

physics
X=vt T=0.2/40=0.005s A=v/t=40ms^-1/0.05s=8.0*10^3ms^-2 F=ma=0.5kg*8000ms^-2 =4.0*10^3N
February 21, 2012

physics
A billiard ball rolling across a table to the right at 2.2 m/s makes a head-on elastic collision with an identical ball. The mass of a billiard ball is 36 g. If the second ball is initially at rest, what is the velocity of the first ball after the collision? If the second ball...
October 12, 2011

physics
A 48.2 kg girl is standing on a 129 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.66 m/s relative to the plank. What is her velocity ...
October 12, 2011

physics
A 1970 kg car traveling at 13.8 m/s collides with a 2960 kg car that is initally at rest at a stoplight. The cars stick together and move 1.91 m before friction causes them to stop. Determine the coefficient of kinetic friction between the cars and the road, assuming that the ...
October 12, 2011

Biology
I'm not sure how to answer one of my homework questions. SraJMCGIN was nice enough to direct me to a site but I already had been there. My teacher kinda of indicted it was true but I don't know how it can- could someone take a second look, please at this question? Is ...
October 9, 2011

Biology-9th grade
I'm not sure how to answer one of my homework questions. Is one function of the alveoli to filter out dirt and pollen before it reaches the lung and why or why not. I don't think it is because the alveoli are used to oxgenate the blood, correct. I don't think they ...
October 9, 2011

FRENCH
I like your definition better, thanks=) And just if you'd like to know, the book I have is called C'est A toi! And it it Level 2.
March 11, 2011

FRENCH
Okay so would agreement just be the endings?
March 11, 2011

FRENCH
In French, what does agreement mean again? Cause for example I put down this: Ils ont marches sur l'Avenue Champs-Elysees. But there shouldnt be an S after marche because theres no agreement with avoir. Could I please know what agreement means again?
March 11, 2011

FRENCH
Thanks very much for the notes=) By Terminology I meant, whats an infinitive, an auxiliary, and past participle.
March 10, 2011

FRENCH
About the Passe Compose, could I get a few notes on that please. I would also like notes on the Terminology.
March 10, 2011

FRENCH
Okay so for this question Qu'est-ce que tu viens de faire aujourd'hui? Je viens de parler au Francais. D'après toi, est-ce qu'il faut être content(e)? Oui, d'après moi, il faut être riche pour être content. Est-ce que tu as ...
March 9, 2011

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