Thursday
August 28, 2014

Posts by sally


Total # Posts: 886

Chemistry
An experiment shows a 144mL sample of gas has a mass of 0.173g at a pressure of 720mmHg at a temperature of 31 degrees celsius. what is the molar mass of the sample of gas?
March 18, 2013

Math
In right triangle ABC what is the arithmetic mean (average), in degrees, of the measures of the two smallest angles? Explain how the answer is 45 degrees.
March 11, 2013

algebra
Triangles ABC and DEF are similar. Find the area of triangle ABC. Round your answer to the nearest tenth. the answer should be __________m^2 triangle abc has a 12m. triangle def has 12m and 18m.
March 9, 2013

Chemistry
How many grams of Na3PO4 are needed to produce 250mL solution that has an Na concentration of 1.04M?
March 9, 2013

College Algebra
Consider only the discriminant, b2 - 4ac, to determine whether one real-number solution, two different real-number solutions, or two different imaginary-number solutions. 2x2 = -2 -5 Thank you
March 9, 2013

Math
In the word Symmetry, which letters are symmetrical?
March 6, 2013

HELP!
Please it is important!
March 1, 2013

Physics
A space probe is carried by a rocket into outer space where it continues to move on its own in a straight line. What keeps the probe moving? Is the answer: the gravitation forces from different stars and planets
March 1, 2013

HELP!
Please help!!!!!!!!!!!
March 1, 2013

Physics
If a Mack truck and Honda Civic have a headon collision, upon which vehicle is the impact force greater and which vehicle experiences the greater acceleration? I know they have same force.
March 1, 2013

Physics
Thanks
March 1, 2013

Physics
1)The Earth exerts an 710 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N 2)If a book is sitting on a table, the force of gravity pulls it down. Why doesn’t it fall? Is it because The table is pushing up on it with a force ...
March 1, 2013

Physics
Thanks
March 1, 2013

Physics
You hit someone with a force of 197 N. How much force is exerted on you? Answer in units of N Is the answer 197 N
March 1, 2013

Physics
You hit someone with a force of 197 N. How much force is exerted on you? Answer in units of N
March 1, 2013

algebra
Solve. x/9-1/7=26/63 STEP 1: The LCM is _________ To clear denominators, multiply each side of the equation by the LCM. _______/1 (x/9-1/7)=__________/1 multiply 26/63. STEP 2: Use the Distributive Property. _____/1 multiply x/9 - _________/1 multiply 1/7 = ______________. ...
March 1, 2013

algebra
Solve the formula for the variable given. P = r-c/n solve for c. (business) I have worked this problem so many times I'm getting confused. please help. Thanking you in advance
March 1, 2013

algebra
Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth. ab=4ft bc=6ft ac=5ft de=6ft ef= 9ft there is no feet given for df Please can anyone help me solve this with steps I don't understand how to do this. Thanking you ...
March 1, 2013

algebra
Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth.
March 1, 2013

chemistry
hemoglobin is the protein that transports O2 through the blood from the lungs to the rest of the body. in doing so, each molecule of hemoglobin combines with four molecules of O2. if 1.00 g of hemoglobin combines with 1.53 mL of O2 at 37 C and 743 torr, what is the molar mass ...
February 20, 2013

chemistry
Solid white P melts then vaporizes at high temperatures. Gaseous white P effuses at a rate that is 0.404 times that of neon in the same apparatus under the same conditions. How many atoms are in a molecule of gaseous white phosphorus?
February 20, 2013

CHEMISTRY URGENT!
for combined gas law
February 3, 2013

CHEMISTRY URGENT!
just one question how do you find the constant k???
February 3, 2013

Chemistry
how many half lives have passed if only 0.625g remain of the original 40g?
January 28, 2013

math
Thank you very much Reiny and also Damon. This is the first time I felt embarrassed helping my son. Sign of things to come of course. As Reiny suggested, we ended up plotting and then selecting less than half a dozen candidates. I also cheated and made a spreadsheet just to ...
January 27, 2013

math
sorry B=(-2,11)
January 27, 2013

math
My son has been given the collinear problem below that has be stumped two folds. 1- By trying to solve the problem using (y2-y1)/(x2-x1)=slope -- and then, find the (b) in y=mx+b for two points takes way way too long to be a 7th grade probem. My son has already been working on...
January 27, 2013

Chemistry
I got 7516.88J for ?J and mass of soln = 158.2g So my equation is 7516.88 J = 158.2g x 3.78 J/(g·°C)x(Tfinal -21.87) 12.57 = Tfinal - 21.87 Tfinal = 34.44°C Which was wrong. The hint they gave me was Start by finding the amount of heat produced when 70.0 mL of 0...
January 24, 2013

Chemistry
The neutralization of H3PO4 with KOH is exothermic. H3PO4(aq) + 3KOH(aq) -> 3H2O(l) +K3PO4(aq) +173.2KJ 70.0 mL of 0.207 M H3PO4 is mixed with 70.0 mL of 0.620 M KOH initially at 21.87 °C. Predict the final temperature of the solution if its density is 1.13 g/mL and its...
January 24, 2013

Chemistry
Can someone please help with this problem and explain it please? If soil has a density of 1.32 g/cm cubed, then what does 1.0 cubic yards of soil weigh in pounds?
January 21, 2013

social science
1) Which large European city declined significantly in population over the past century? A) Paris B) London C) Rome D) Madrid 2) The industrial city was characterized b A) decentralization B) corporate growth C) manufacturing D) commerce 3) Modern humans have existed for ...
January 16, 2013

Chem
34.5 g of O2 react with lithium metal to produce solid lithium oxide. How many grams of Li2O are produced
January 7, 2013

Physics
A rogue chipmunk has been raiding the secrete acorn stash of 3 squirrels. On discovering the perpetrator in the very act they secure him with 3 ropes and attempt to pull him off the limb where he falls to his demise. The first squirrel pulls at an angle of 12 degrees with a ...
December 15, 2012

Chemistry
Solve the following pls. Calculate the number of grams in these quantities: 1. 0.0600 mol HC2H302 2. 4.50 x10^21 molecules glucose C6H2O6
December 14, 2012

Psychology
what is the study called where the same people are tested repeatedly at different ages?
December 5, 2012

math 6th grade
what does y=x
December 4, 2012

math
A drawer contains exactly 5 red socks, 8 blue socks, 10 while socks, 12 green socks , and 7 yellow socks. Find the least number of socks to be chosen which will guarantee that there will be at least seven socks of the same color.
November 30, 2012

4th Math
can u help me find the input and output?Input numbers are 3,5,9 and output numbers are 12,15,30,33 and how u got the answers
November 28, 2012

Exceptional Child
James wants a new toy. He says, "James toy". He is using: A. short sentences B. telegraphic speech. C. baby talk. D. holophrastic speech.
November 27, 2012

trig
I don't understand what to do after i convert everything into cos and sin. Verify: cosx(tanx+cotx)=cscx
November 25, 2012

chemistry
first you must find the # of moles of NaCO3 produced: 79g NaCO3/83g(per mole of NaCO3)NaCO3 = .95 moles NaCO3 then you compare the # of moles in the equation, its a 1:1 molar ratio NaO + CO2 ==> NaCO3 (use dimensional analysis) .95 mol NaCO3| 1 mol NaO | 39g NaO ...
November 25, 2012

SCIENCE 9 URGENT!!
2. Look into the urinary system or urogenital system. (This is just a guess) You can do more research on the internet. But it can get you started.
November 7, 2012

SCIENCE 9 URGENT!!
4. The testes are outside of the body. Because sperm can only live at a specific temperature. Our body temperature is too hot for them, and they would die. That is why they have to be outside of the body.
November 7, 2012

English
Thank you I thought it might be an intensive pronoun because if removed the meaning os the sentence would be the same.
October 21, 2012

English
In this sentence: Matt began to see himself differently after he talked to Mr. Bataky. In this sentence "himself" is an object pronoun, subject pronoun, intensive pronoun, reflexive pronoun?
October 21, 2012

Chemistry
how do you balance the equation with H3PO4(aq)and BaCl2(aq)?
October 21, 2012

math
What percent of $1.00 is a nickel?
October 17, 2012

math
Thank you
October 11, 2012

math
I am not sure why you multiplied. Can you explain that. Thank you
October 11, 2012

math
If there is 1/6 of a cake and Mitchell only wants 3/12 of it, how much of the cake does he want
October 11, 2012

physics
Two objects (39.0 and 21.0 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find (a) the acceleration of the objects and (b) the tension in the string.
October 3, 2012

physics
A student is skateboarding down a ramp that is 8.48 m long and inclined at 16.4° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 3.94 m/s. Neglect friction and find the speed at the bottom of the ramp.
October 3, 2012

Pre Cal
f(x) = log3(93 x + 3 815 x + 3)
October 2, 2012

Home, school, Communication
I went back and looked again. You're correct C is the right answer. thank you
October 2, 2012

Home, school, Communication
Sandwiching refers to all of the following EXCEPT: A a communication technique that is often useful. B providing less plesant news between two more plesant ideas. C litening carefully. D beginning and ending communication on positive note. I pick A
October 2, 2012

Math
Write an algebraic expression for the verbal expression: five times the sum of three and f
October 2, 2012

Home, School and community
I pick A
October 2, 2012

Home, School and community
Which of the following is NOT always true about parents who ask for special treatment? A They are trying to take advantage of a teacher. B They want the best for their child. C They require thoughtful consideration of how to provide for request. D they won't understand if ...
October 2, 2012

trig
i have to draw a flat unit circle all the way to 4 pi in radians. i can get to 2 pi but i have trouble finding the radians if i went one more time around the unit circle.
September 28, 2012

Math
How many significant figures does 22.0, 0.22, 22. , 0.022? Im just confused as to the decimal addition to numbers and what the sig figs will be for them. Thank you!!!
September 20, 2012

SIG FIGS
How many significant figures does 22.0, 0.22, 22. , 0.022? Im just confused as to the decimal addition to numbers and what the sig figs will be for them. If you dont mind can you please state some rules for sig figs that are helpful and some confusing rules as well and pretty ...
September 20, 2012

biology
What are the step by step in finding the answer for this? 4C6H1206 carbon atoms: Hydrogen atoms: Oxygen atoms: Molecules:
September 19, 2012

Stats
Problem 29. Demand for cookies (Q) is given as follows: Q = 180/Pc + I/Pd + 3 Pc = price of cookies I = income Pd = price of donuts Note: Q=28, Pc=10, Pd=7 Given the above information what is the price elasticity of demand at Q=28?
September 18, 2012

adv algebra
name the property that each equation illustrates 83+6=6+83
September 13, 2012

Math
If 2(b + 1) < -6, then a. b < -4 b. b > -4 c. b < -7/2 d. b > -7/2
September 10, 2012

Math
If 2(b + 1) < -6, then a. b -4 b. b > -4 c. b < -7/2 d. b > -7/2
September 10, 2012

accounting
Logan Products computes its predetermined overhead rate annually on the basis of direct labor-hours. At the beginning of the year, it estimated that 38,000 direct labor-hours would be required for the period’s estimated level of production. The company also estimated $...
September 8, 2012

accounting
Selected T-accounts for Rolm Company are given below for the just completed year: Raw Materials Manufacturing Overhead Bal. 1/1 31,000 Credits ? Debits 390,000 Credits ? Debits 420,000 Bal. 12/31 56,000 Work in Process Factory Wages Payable Bal. 1/1 73,000 Credits 710,000 ...
September 8, 2012

accounting
The following cost data relate to the manufacturing activities of Black Company during the just completed year: Manufacturing overhead costs: Property taxes, factory $ 3,000 Utilities, factory 4,800 Indirect labor 9,900 Depreciation, factory 23,900 Insurance, factory 5,800 ...
September 8, 2012

Phy 231
A baton consists of a nearly massless rod of length L and two spheres attached to the end of the rod, whose masses are each M and whose centers are separated by L. The spheres have radius R. If the sphere radius R is not negligible compared to the length L, what is the moment ...
July 31, 2012

Phy 231
A CD-Rom starts from rest and undergoes uniform angular acceleration until it reaches 26,000 rpm in 0.25 s. Through what angle does it rotate during this time?
July 31, 2012

Phy 231
an 18-wheeler travels down the highway with a speed of 50 km/hr. each wheel has a 30 cm radius and a mass of 16 kg. what is the total kinetic(translational and rotational) energy of all 18 wheels?
July 31, 2012

Civics Moral Education
I need help with my homework
July 20, 2012

computers
How can i tell python to stop printing something after a specific amount of time?
July 13, 2012

human development
what are the results of renee baillargeon's sliding carrot research may suggest the object permanence
July 9, 2012

science
what animals dont have a circulatory system. please answer fast thank you
June 17, 2012

English Writing
Apology letter Please help me thanks in advance? Hotel manager is writing a letter to one his customer because there is no room available for him. He came to watch football match with his family now. hotel manager put him up in the motel and paid for that. Manager is offering ...
June 15, 2012

english
The thesis statement tells the reader what the essay will be about, and what point you, the author, will be making. You know what the essay will be about. That was your topic. Now you must look at your outline or diagram and decide what point you will be making. What do the ...
June 15, 2012

spelling bee
thank you
May 30, 2012

spelling bee
how do you know when to use ous, ious, eous, or uous when spelling. im asking for in the sense of a rule or something that can help me out while im spelling. And if you have any can you please give me some other rules that my also help me out. Thank you
May 30, 2012

algebra
5x -4 = 304
May 20, 2012

Algebra
solve in (x-5) =7
May 20, 2012

Chemistry
the chemical dichlorobenzne will not disolve in water, what muct the polarity of dichlorobenznebe by and why?
May 13, 2012

examinations
i remember most of the things i'm actually pretty good in math usually with a 97+ average all the time. i'm also part of the math club in school. but i just want to know how well will i be able to do and how much time will i need to get a 95+ grade on the regents.
May 6, 2012

examinations
how long does it take to study for the algebra regents? do you think i can study for it in a month? I have taken the first 9 chapters of the barrons book and also studied for the shsat and passed but, will one month be enough for me to study and get at least a 95 and ...
May 6, 2012

math
A tree that is 100 feet tall casts a shadow that is 150 feet long. Determine the angle at which the rays of the sun hit the ground, to the nearest degree.
April 23, 2012

physics please HELP !
Which situations are examples of a particle with a non-zero acceleration? (Select all that are true for full credit.) a)A car driving around a circular track at constant speed. b)A child going back and forth on a swing c)A runner moving in a straight line with a constant speed...
April 18, 2012

physics
Which situations are examples of a particle with a non-zero acceleration? (Select all that are true for full credit.) a)A car driving around a circular track at constant speed. b)A child going back and forth on a swing c)A runner moving in a straight line with a constant speed...
April 18, 2012

Science
A weight lifter lifts a barbell from the ground, raises it at a constat velocity and holds it motionless over his head. How does the force of the lifter compare with the wieght of the barbell at different stages of the lift?
April 11, 2012

algebra
solve by addition method x +3y +z =6 3x + y – z = -2 2x +2y – z = 1
March 30, 2012

physics
A 67.5-kg basketball player jumps vertically and leaves the floor with a velocity of 1.66 m/s upward. (Take upward as positive and forward as positive.) (a) What impulse does the player experience? magnitude direction (up,down, back or zero) (b) What force does the floor exert...
March 29, 2012

physics
A 0.255-kg volleyball approaches a player horizontally with a speed of 14.2 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. (a) What impulse is delivered to the ball by the player? (b) If the player...
March 29, 2012

physics
A force of magnitude Fx acting in the x-direction on a 2.50-kg particle varies in time as shown in the figure below. (a) Find the impulse of the force. (b) Find the final velocity of the particle if it is initially at rest (c) Find the final velocity of the particle if it is ...
March 29, 2012

algebra
Could someone please help me with this? Is it possible to subtract two polynomials, each of degree 3, and have the difference be a polynomial of degree 2? If so, give an example. If not, explain why not. thanks
March 28, 2012

algebra
Could someone please help me with this? (1) If x is a nonzero real number, is x–2 always positive, always negative, or positive or negative depending on whether x is positive or negative? Explain your answer.
March 28, 2012

language arts
try google.
March 26, 2012

physics please help!!
figures should help you. draw the figure of the radar gun and try solving it.
March 26, 2012

Calculus
yes ur correct.
March 26, 2012

Chemistry
How many mL of a .10 M NaOH solution are needed to neutralize 15 mL of .20 M H3PO4 solution? Write nbalanced equation: 3NaOH + H3PO4 → Na3PO4 + 3H2O 3mol NaOH recat with 1mol H3PO4 In all these titration questions, do it the simple way: Use the following equation: Ma*Va/...
March 26, 2012

chemistry
ok then no change.
March 26, 2012

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Next>>

Search
Members