Wednesday

August 31, 2016
Total # Posts: 269

**Chemistry**

At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.93 m by 2.28 m by 2.25 m?
*August 29, 2016*

**Chemistry**

A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calculate the mass of pure acetic acid in 460 mL of this solution at 20 C. Answer in units of g.
*August 29, 2016*

**Chemistry**

Alright thank you so much for your help! I really appreciate it.
*June 11, 2016*

**Chemistry **

The standard disposable propane cylinders for use with camp stoves, lanterns, portable barbecues, etc, contain 355 g of propane. Calculate the total energy available from one of these cylinders.
*June 11, 2016*

**Intro to computers 1**

Which logging category does not appear in Event Viewer by default? A. Application B. System C. Volume D. Security
*June 10, 2016*

**math**

x = 90.1?
*May 19, 2016*

**math**

There is a diagram of a running track. The track is made up of two straights and two semicircles. The radius of each semicircle is 35 meters. The length of the outer perimeter of the entire running track is 400 meters. Find the length of one of the straight sections of the ...
*May 19, 2016*

**chemistry**

Now I am a little bit puzzled.If the electronic structure of Fe is Ar 3d^6 4s^2 ,then what i can infer is that i would use 4,but the accurate number would be 3,plz make yourself clear.
*April 30, 2016*

**chemistry **

How can i be accurate when assigning oxidation numbers? By this i refer to elements that have more than 1 oxidation # . For example: I have been working with hydrides and i had this reaction in mind: Nb + H Shoud i use 3 or 5 for Nb, why?
*April 30, 2016*

**SCIENCE**

Which of the following gases occupy the smallest volume at STP? a 4.032 g H2 b 1.000 mol of carbon dioxide c 6.022 × 1023 molecules of O2 d 35.45 g Cl2
*April 27, 2016*

**Math**

At the grocery store Mr and Mrs Bailey bought 24 apples and 18 pears. Write a ratio in simplest form to compare apples to pears
*April 14, 2016*

**Spanish**

Your answers are accurate , congrats on your excellent Spanish! !
*April 4, 2016*

**Chemistry**

Number of Moles of AgNO3 when 0.25 grams of NaCl react with AgNO3
*April 4, 2016*

**sociel studies**

how did most people in the middle colonies make a living
*March 28, 2016*

**History Check My Answer!**

Is it B?? That was my second answer.
*February 25, 2016*

**History Check My Answer!**

Hey I just have 1 question. What event caused four additional Southern states to secede from the Union? The U.S. accepted West Virginia as a state. The South fired on Fort Sumter. Lincoln declared the Emancipation Proclamation. ****** Lincoln raised an army.
*February 25, 2016*

**Physics**

Josie and Charlotte push a 14-kg bag of playground sand for a sandbox on a frictionless, horizontal, wet polyvinyl surface with a constant, horizontal force for a distance of 8 m, starting from rest. If the final speed of the sand bag is 0.15 m/s, what is the magnitude of the ...
*February 10, 2016*

**Physics**

It takes 170 kJ of work to accelerate a car from 21.5 m/s to 27.0 m/s. What is the car's mass?
*February 9, 2016*

**chemistry**

Propane is used in BBQs and burns according to the following equation: C3H8 + 5O2 -> 3CO2 + 4H2O. If 2.2 moles of carbon dioxide are produced, how many moles of oxygen gas reacted?
*February 3, 2016*

**Physics**

What is the average linear speed of Mercury about the Sun? (The distance from the Sun to Mercury is 5.80 1010 meters. The orbital period around the Sun is 88 days.)
*February 1, 2016*

**Math**

1? I'm confused
*January 31, 2016*

**Math**

1. Doug earns $10.50 per hour working at a restaurant.on Friday, he spent 1 3/4 hours cleaning, 2 1/3 hours doing paperwork, and one and 1 5/12hour serving customers.what were doughs earnings?
*January 31, 2016*

**Math**

21. Miss Donaldson as $18.80 per hour for the first 40 hours she works in the week. She Earns 1 1/2Times that amount per hour for each hour beyond 40 hours in a week. , Miss Donaldsonwhere 45.5 hours. How much money did she earn? A. A health insurance payment of $34.55 was ...
*January 31, 2016*

**Math**

Continuation... Round your answer to the nearest 10th of a second
*January 31, 2016*

**Math**

1. Doug earns $10.50 per hour at a restaurant. On Friday, he's been 1 3/4 hours cleaning, 2 1/3 hours doing paperwork, and one 512 hours serving customers . What were dougs earning? 6. Salid bought 35 feet of window trim at a hardware store. The trim it cost $1.75 per foot...
*January 31, 2016*

**Physics**

On earth, two parts of a space probe weigh 14500 N and 6400 N. These parts are separated by a center-to-center distance of 19 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far ...
*January 29, 2016*

**Physics**

A car travels at a constant speed around a circular track whose radius is 2.8 km. The car goes once around the track in 430 s. What is the magnitude of the centripetal acceleration of the car?
*January 21, 2016*

**Physics**

A wheel is rotating at a rate of 2.5 revolutions every 3.6 s. Through what angle, in radians, does the wheel rotate in 1.0 s?
*January 21, 2016*

**Math**

The tournament starts with 64 teams playing 32 games and continue until there is only one team left. Come up with a formula for how many teams are left after x rounds. Ok so far I have y= 64-x-32 However, I know that won't work. I'm just not really sure what to do with...
*December 1, 2015*

**chemistry**

C3H6O + 4O2 --> 3CO2(g) + 3H2O(g) deltaH= -1790kJ the density of C3H6O is 0.79g/mL. HOw much heat is released by the combustion of 150mL of acetone?
*November 3, 2015*

**health **

What causes depression? A. Environmental issues B. There is no known cause C. Biochemical issues D. Genetic issues ithink it D?!!
*November 2, 2015*

**health **

________ may likely lead to aggressive behavior. A. All of the above B. Complacency C. Sadness D. Irritability think it d ????!!!
*November 2, 2015*

**physics101 please **

a 12,000 kg truck is moving right at 22 m/s collides with and sticks to a 1200 kg car moving to the right at 16 m/s. With what speed do the two vehicles move after the collision and in what direction?
*October 19, 2015*

**physics101 please **

a 1500 kg car is driven around a circle of radius 120 m and at a speed of 26 m/s. calculate the magnitude of the centripetal force of the car. What real force keeps the car moving in a circle? the answer is not one of the four fundamental forces, but way one of those forces ...
*October 19, 2015*

**physics**

a motorcycle initially moving at +32 m/s accelerates at -4.0 m/s for 3.0s. a car initially at rest accelerates at 4.0 m/s for 5.25 s. a) Which vehicle will be going faster at the end of each given time, and how much faster? b) how far does each vehicle travel during their ...
*October 19, 2015*

**Math**

A sc tourists bureau survey showed that 75 % of those who seek information about the state actually come to visit . The office received 8 requests for information. What is the probability that probability that 4 to 6 inclusive of the people will visit sc?
*October 9, 2015*

**math**

A shopper uses a department store gift card to pay for 3 sweaters priced at $27 each. What integer can be used to show the amount of change?
*September 27, 2015*

**Chemistry**

Nevermind I got it.
*September 24, 2015*

**Chemistry **

What is the concentration when each of the following is dissolved in 1.50 L of water: a) 3.00 moles of NaCl b) 10 g of KCl c) 110 mg of NaCO3
*September 24, 2015*

**physics**

a car moving at 6m/s accelerate at 1.5meter squared per second for 4seconds.It then it slows down at rate 1.2 meter squared per second. What is the distance travel?
*August 21, 2015*

**Physics**

A photon having wavelength λ scatters off a free electron at A (see figure below), producing a second photon having wavelength λ'. This photon then scatters off another free electron at B, producing a third photon having wavelength λ'' and moving in ...
*June 17, 2015*

**Math**

Determine the simple interest p=6742.75,6.05%, t=90 days
*April 25, 2015*

**Chemistry**

1. How many moles of ammonia NH3 are produced when 0.45 moles of nitrogen N2 reacts? N2 + 3H2 yields 2NH3 2. How many mililiters of water will be produced when 2.05 g of hydrogen reacts? The density of water is 1.00 g/mL ? 2H2 + O2 yields 2H2O 3. What is the limiting reactant ...
*March 18, 2015*

**math**

Rick has a collection of 6 video games. He lets his best friend borrow: of his video game collection. Write two equivalent to this number Explain how you came fractions up with the fractions.
*March 2, 2015*

**math**

Adam wants to compare the fractions 129 6 and 1. He wants to order them from least to greatest and rewrite them so they all have the same denominator. Explain how Adam can rewrite the fractions.
*March 2, 2015*

**business math**

A local Barnes and Noble paid a $79.44 net price for each calculus textbook. The publisher offered a 20% trade discount. What was the publisher’s list price?
*February 24, 2015*

**Grade 9 French **

I need help I'm trying to find a rap to help me with the present and irregular verbs
*February 9, 2015*

**health**

three information technology applications--clinical decision support systems--as components of QI management.
*January 19, 2015*

**English**

no its not A. I got it wrong.
*October 8, 2014*

**Geometry**

Given that R is between S and T, find each missing measure. RS=6, TR=4.5, TS=?
*September 8, 2014*

**math**

The least common multiple of two numbers is 60 and one of the other number is 7 less than the other number what are the numbers justify your answer
*September 3, 2014*

**History**

Ok the question was, what evidence in the declaration is there of religious faith? I put, "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty, ...
*July 23, 2014*

**History**

thanks.
*July 23, 2014*

**History**

So for my homework question it asks what reference do you see to Native Americans in the Declaration of Independence? I put: "He has excited domestic insurrections amongst us, and has endeavored to bring on the inhabitants of our frontiers, the merciless Indian Savages, ...
*July 23, 2014*

**History**

Question about Puritans behavior in Massachusetts? I was given a picture that wont let me post on here. The top picture has a cowboy boot and a book, and the second picture has a more feminine boot, with dice, a cup, etc. And have to answer: What does the labeling in the two ...
*July 16, 2014*

**Algebra**

nvm its a
*July 7, 2014*

**Algebra**

Myra uses an inverse variation function to model the data for the ordered pairs below. (2, 30), (3, 20), (4, 15), (5, 12), (6, 10) Which statement best explains whether an inverse variation function is the best model for the data? An inverse function is the best model because ...
*July 7, 2014*

**Algebra**

Jordan uses a linear equation to model the data in a table. Which reasoning might Jordan have used in the decision to model the data with a linear equation? The products of corresponding x- and y-values are equal. The ratios of consecutive y-values are equal for evenly spaced ...
*July 7, 2014*

**trig**

earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between earth and mars are the ...
*May 27, 2014*

**Math**

i don't know
*March 7, 2014*

**Physics **

A sound wave in a solid has a frequency of 15.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air?
*March 4, 2014*

**math **

on a boat tour there are half as many children there are as adults. ther are 40 people on the tour how many children are there
*March 3, 2014*

**Math**

Write an equation of a line that is parallel to the line y-3=2(x+5) and goes through the point (5,7)
*February 12, 2014*

**Math**

Three minutes after take-off, and airplane is 5,000 feet in the air. If it ascends at a constant rate, what is the rate of change? Please help.
*February 12, 2014*

**Math**

In 3 minutes I can type 192 words. and in 5 minutes I can type 311 minutes. Find how many words I can type per minute. Help please.
*February 12, 2014*

**Math**

Solve each system using the method of your choice. 1. 7x+2y=17 2. 6x-5y=-9 3. y=4x-8 4. y=2x+10 5. 3x-6y=30 6. y=-6x+34 7. 3x+y=5 8. 15x+5y=2 9. 2m=-4n-4 10. 3m+5n=-3 11. 5x+y=0 12. 5x+2y=30 Thank you. (:
*February 11, 2014*

**4th grade math**

If you wanna no the answer it's I got nothing
*November 18, 2013*

**Chemistry**

A buffer is made from 0.20 M sodium acetate and 0.20 acetic acid. Ka=1.8 x 10^-5. The ph is
*July 10, 2013*

**Geometry 1**

find the distance between K(9,2) AND L(-3,9)to the nearest tenth
*May 20, 2013*

**chemistry**

Consider the following reaction: I2(g) + Cl2(g) 2ICl(g) o Kp = 81.9 at 25 C. Calculate ∆Grxn for the reaction at 25 C under each of the following conditions: a Standard conditions. b At equilibrium. c PICl = 2.55 atm; PI2 = 0.325 atm; PCl2 = 0.221 atm.
*April 18, 2013*

**Chemistry**

Calculate ∆Ssurr when a reaction having each of the following changes in enthalpy: a. ∆Hrxn0 = -287 kJ; 298 K. b. ∆Hrxn0 = 127 kJ; 77 K.
*April 18, 2013*

**Chemistry**

only one of each of the following pairs of reactants undergoes a reaction. Complete and balance the equation for the reaction that occurs. NaCl (aq) + BaCl2 (aq) --> Na2SO4 (aq) + BaCl2 (aq) --> NO3^- (aq) + OH^- (aq)+ Al (s) --> CO3^2- (aq) + OH^- (aq) +Al (s) -->...
*April 15, 2013*

**pre-calculas**

Find the slant asymptote, if any, of the rational function. Do not graph the function. (Enter your answers as a comma-separated list of equations. If an answer does not exist, enter DNE.) f(x) = x2 − 2x + 15 _____________ x + 7
*March 10, 2013*

**Math **

In an experiment with light, Rodney used 6 square polarized filters, 3 in. on a side. What was the total surface area of the filters? Count one face only for each filter.
*February 7, 2013*

**medical coding**

I AM LOOKING FOR THE CORRESPONDING HCPCS CODE FOR A 10 MILIGRAM INJECTION OF CORTISONE IN THE LEFT BREAST
*February 7, 2013*

**Physics **

Stephanie serves a volleyball from a height of 0.78 m and gives it an initial velocity of +7.7 m/s straight up. How high will the volleyball go? The acceleration of gravity is 9.81 m/s^2. How long will it take the ball to reach its maximum height?
*January 28, 2013*

**Sociology**

The text, Introduction to Sociology, describes many individuals who have contributed to our current view of sociology, including: C. Wright Mills Howard Becker W. I. Thomas Auguste Comte Emile Durkheim Herbert Spencer Karl Marx Erving Goffman’s Harriet Martineau W. E. B. ...
*January 23, 2013*

**Chemistry**

A solution of H2SO4 was electrolyzed using the inert platinum electrodes. A) Write the balanced half-reactions for the anode and cathode in this cell. B) How many coulombs passed through the cell in 90 minutes at 8.0 amperes? C) How many moles of electrons pass through the ...
*January 6, 2013*

**math **

at the beginning of the summer, conan had $180 in the bank. each week he deposits another $64 that he earns mowing lawns. is his account balance proportional to the number of week since he started mowing lawns?
*January 2, 2013*

**math **

a baseball club has 18 players for every team, with the exception of four teams that have 19 playes each. is the number of players proportional to the number of teams?
*January 2, 2013*

**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.
*November 27, 2012*

**Statistics **

A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following results: x = $50.50 ...
*November 14, 2012*

**Statistics **

When testing H0: σ12 = σ22 vs. Ha: σ12 ≠ σ22 two random samples of sizes 10 and 8, respectively, are used. The calculated value of the test statistic is found to be equal to 2.22. Which of the following statements is true? a. H0 must be rejected at &#...
*November 14, 2012*

**Statistics **

When estimating a population mean μ, where the population standard deviation σ is known, we can: a. choose a larger z value, construct a wider confidence interval, and achieve a lower confidence level b. choose a smaller z value, construct a narrower confidence ...
*November 14, 2012*

**algebra**

Use an associative expression to rewrite the expression (r+43)+s= An equilveant expression is
*November 3, 2012*

**Physics**

A fox fleeing from a hunter encounters a 0.665 m tall fence and attempts to jump it. The fox jumps with an initial velocity of 7.05 m/s at an angle of 45.0°, beginning the jump 2.17 m from the fence. By how much does the fox clear the fence? Treat the fox as a particle.
*October 27, 2012*

**Physics**

An archer wishes to shoot an arrow at a target at eye level a distance of 45.0 m away. If the initial speed imparted to the arrow is 68.2 m/s, what angle should the arrow make with the horizontal as it is being shot?
*October 27, 2012*

**books**

CeCe, I agree with part of your statement but not the statement in its entirety. In Jane Eyre you have two people who some might say were destined to unite. Fate said that no matter what at some point these two would get together. Circumstance stood in the way for both of them...
*October 11, 2012*

**physics**

A car traveling initially at +5.7 m/s acceler- ates uniformly at the rate of +0.79 m/s2 for a distance of 262 m. What is its velocity at the end of the accel- eration? Answer in units of m/s What is its velocity after it accelerates for 132 m? Answer in units of m/s What is ...
*September 20, 2012*

**physics**

With an average acceleration of −0.96 m/s2, how long will it take a cyclist to bring a bicycle with an initial speed of 14.8 m/s to a complete stop? Answer in units of s
*September 20, 2012*

**physics**

A window washer drops a brush from a scaf- fold on a tall office building. What is the speed of the falling brush after 2.7 s? (Neglect drag forces.) The acceleration due to gravity is 9.8 m/s2 . Answer in units of m/s How far has it fallen in that time? answer in units of m
*September 20, 2012*

**physics**

A car travels along a straight stretch of road. It proceeds for 11.9 mi at 58 mi/h, then 29.4 mi at 44 mi/h, and finally 36.9 mi at 31.6 mi/h. What is the car’s average velocity during the entire trip? Answer in units of mi/h
*September 20, 2012*

**Physics**

A ball is thrown straight up and reaches a maximum height of 6.71 m. What was its initial speed? The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m/s please give right answer and explain how you got it, thanks !
*September 20, 2012*

**Physics**

Judy, by chance, spots a potted plant falling outside the window at 2.88 m/s . Further down the same building, Judy’s boyfriend clocks the pot at 54 m/s . How far apart are the friends? The acceler- ation of gravity is 9.8 m/s2 . Answer in units of m Please give right ...
*September 20, 2012*

**Physics **

1) A physics book is moved once around the perimeter of a table of dimensions 1 m by 3 m. What is the distance traveled? 2) A window washer drops a brush from a scaf- fold on a tall office building. What is the speed of the falling brush after 2.7 s? (Neglect drag forces.) The...
*September 20, 2012*

**math**

suppose that sin0=-5/13 and that 0 is a quadrant III angle. what is the exact value of cos0
*July 29, 2012*

**Math**

for function f(x)=(x)/x^2-4. 1. State the vertical and horizontal asymtopes. 2. Graph this function.
*July 29, 2012*

**math**

A drawer contains 4 red socks, 3 white socks, and 3 blue socks. without looking, you select a sock at random, replace it and seect a sond sock at random. what is the probablity that the first sock is blue and the second sock is red?
*May 21, 2012*

**Calculus**

The question will first read in English followed by a reading in French. *************************************** If alpha + 2 beta = pi/4 AND tan beta = 1/3. What would tan alpha mesure? (Keep in mind that pi/4 is the same as 45 degrees.) Si alpha + 2 beta = pi/4 ET tan beta...
*April 30, 2012*

**physics**

an elevator weighing 2000N attains an upward velocity of 16m/s in 4second with uniform acceleration.How much force is be exerted inxesting table?
*April 27, 2012*