Sunday

December 4, 2016
Number of results: 19,232

**CHM formula needed, pls?**

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.

*November 19, 2012 by Vc*

**CHM 152**

At 20oC, a 2.32 M aqueous solution of Ammonium Chloride has a density of 1.0344g/ml. WHat is the molality of Ammonium Chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol?? I am not sure how to incorporate the density into the problem to come up with how to ...

*June 10, 2010 by Car*

**physics.pls help**

can you help me to isolate the ''t'' in this formula. d=V1t+1/2at^2 pls help

*November 5, 2011 by ted*

**org chm**

how many grams of KOH are needed to make 590 ml of a solution with a pH of 11.35?

*November 17, 2010 by carol*

**CHM**

In the chemical formula of ammonium sulfate, (NH4)2SO4, how many hydrogen atoms are present? 4

*January 27, 2013 by jakey *

**math help pls pls**

How do you solve the formula for the perimeter of a rectangle with width W and L length for the length p=2w+2L

*March 1, 2016 by Oscar*

**physics-pls help**

The ball is thrown froma height of 10 meters with an initial upward velocity of 3.0m/s. How long does it take to land on the ground? What is its maximum height? i know the formula is d=v1t+1/2at^2 but i do not know what else to do. pls help

*November 7, 2011 by ted 2*

**science help**

How can you describe the location of hafnium (Hf, atomic number 72) on the periodic table? choose all that apply. -Transition metals -noble gases -group 6, period 4 -group 4, period 6 pls help me damon or ms sue pls help me pls pls pls

*March 31, 2015 by Oscar*

**math help pls pls pls**

Given f(x) = 4x + 13 and g(x) = 10x − 2, solve for (f + g)(x) and select the correct answer below. (f + g)(x) = 14x + 15 (f + g)(x) = 14x + 11 (f + g)(x) = 6x + 11 (f + g)(x) = 6x + 15 is it b pls help me

*March 31, 2016 by Oscar*

**math(urgent)**

$1000 was invested for two years at 10% simple interest .calculate the effective rate was earned. pls check my solve (1+0.1/2)^2-1 = 0.1025 but the true answer is 9.54% pls help me to get the formula of effective rate

*May 16, 2014 by fizz*

**CHM**

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol. Need the formula to understand how to continue with more problems.

*November 19, 2012 by V*

**algebra pls help**

A numbmer is divided by 2, then 6 is submtacted from the result. what operations are needed to return to the original number? I am going to say: x/2 -6 the operations needed are multiplication and addition to get right answer?

*November 14, 2011 by marko*

**Chemistry**

My questions keep getting cut off. What am I doing wrong? Here is my question again. Thanks for the help. What is the empirical formula for a compound whose molecular formula is C2Cl6? a) CCl3 b) CCl4 c) C2Cl6 d)CCl e) more info needed I think the answer is E more information ...

*October 25, 2009 by Mattt K*

**math help pls pls pls**

The graph below plots the values of y for different values of x: Plot the ordered pairs 1, 3 and 2, 4 and 3, 9 and 4, 7 and 5, 2 and 6,18 Which correlation coefficient best matches the data plotted on the graph? 0.5 0.8 0.9 1.0 pls help me

*March 19, 2016 by Oscar*

**science**

pls. pls. pls. somebody help me...you see im on a science class and i don't want to go to the regular section, so pls.... give me an acrostic for the word "SCIENCE"

*June 11, 2008 by chris*

**geography**

hi,i have make a project on hurricane Katrina on disaster management pls help to get information pls pls help me............

*June 17, 2010 by varsha*

**Chemistry :'( **

(d) Which of the following sets of quantum numbers is not permitted? Select all that apply. 2,1,1,-1/2 1,1,0,-1/2 2,-1,1,-1/2 3,2,1,1/2 Pls pls pls help me :( x

*November 18, 2012 by Anonymous*

**Math pls help me pls pls**

If the outliers are not included, what is the mean of the data set? 72, 82, 3, 55, 62, 73, 90, 80, 151, 59, 46, 31 59 65 67 73 is it b

*February 10, 2016 by Jason*

**help pls world history pls pls **

Which of the following is not associated with one of the pillars of Islam? charity faithfulness sacrifice self-glorification

*February 28, 2016 by Oscar*

**world history pls pls help help**

Who was the power behind the throne during Justinian's reign? Belisarius Augustus Sophia Theodora is it d pls help

*February 29, 2016 by Oscar*

**science help pls pls**

Which of the following terms refers to the foamy bubbles of a breaking wave? Duration Fetch Speed Surf is it d pls help me

*April 15, 2016 by Oscar*

**physics.pls help**

Participants in a road race take water from a refreshment station and throw their empty cups away farther down the course. If a runner has a forward speed of 6.20m/s, how far in advance of a garbage pail should he realease his water cup if the vertical distance between the lid...

*November 8, 2011 by ted*

**physics.pls help**

Participants in a road race take water from a refreshment station and throw their empty cups away farther down the course. If a runner has a forward speed of 6.20m/s, how far in advance of a garbage pail should he realease his water cup if the vertical distance between the lid...

*November 9, 2011 by ted*

**physics**

A man is driving his car ata velocity of 100km/h on a straight road. H e sees a traffic jam at a distance and slows down to 12.5m/s in 3.0s. What is the average acceleration of the car? pls help. I know that the formula for average acceleration is V2-V1 divided by T2-T1 but ...

*October 12, 2011 by ted*

**physics.pls help**

The volume of a cylinder is defined by the formula V=pie R squared h. If initially have a cylinder with a volume of 10m cubed. Find the volume of the cylinder if the height doubles and if the height is cut in half. pls i really need help.

*November 3, 2011 by ted*

**math help pls pls pls**

Choose the polynomial written in standard form. x^3y^2 + 4x^4y + 10x^9 x^4y^2 + 4x^4y^5 + 10x^2 xy^2 + 4x^3y^8 + 10x^2 x^4y^5 + 4x^3y^2 + 10x^2 is it the last one pls help

*March 31, 2016 by Oscar*

**science help pls pls**

The information about groundwater recorded by a student is valid when it is not biased its results cannot be repeated it is not obtained from a primary source its findings do not have to be shared with others is it a pls help me

*April 11, 2016 by Oscar*

**CAN SOMEBODY PLS GIVE ME THE FORMULA FOR THIS!!???**

google is being a pain right now so i cant find a simple answer, its giving me all these complex examples instead I JUST NEED THE FORMULA FOR FINDING THE LATERAL AREA OF A SQUARE PYRAMID. THAT'S ALL. thank you.....

*February 26, 2014 by TTR+S<3 *

**Algebra ASAP**

pls pls help out A geometric sequence begins 36, 9, 9/4, 9/16, 9/64, . . . . (a) Find the common ratio r for this sequence. r = (b) Find a formula for the nth term an of the sequence. an = (c) Find the tenth term of the sequence. a10 =

*August 14, 2015 by hey*

**algebra pls pls help**

Factor completely: 2x^3 + 14x^2 + 6x + 42? A. 2[(x^2 + 3)(x + 7)] B. (2x^2 + 6)(x + 7) C. (x^2 + 3)(2x + 14) D. 2(x^3 + 7x^2 + 3x + 21) is it d pls help me

*May 12, 2016 by Oscar*

**chemistry**

A puncture in the tubing of a refrigerator can cause severe frosbite as chloroethane C2H5Cl, vaporizes. Use this thermochemical equation to calculate the heat absprbed when 23.6g of chloroethane vaporizes at its boiling point (9.66kj) C2H5Cl + 26.4kj arrow C2H5Cl. pls i need ...

*November 19, 2012 by Ted*

**world history pls pls help help**

What did special religious observances in both the Aztec and Spanish calendars provide for people? Work and income Education and training Law and justice Fun and entertainment is it d pls help

*March 14, 2016 by Oscar*

**science help pls pls**

Which of the following is typically associated with a large amount of organic material in a water supply? Lower turbidity Higher phosphates Fecal coliform High dissolved oxygen is it c pls help

*April 3, 2016 by Oscar*

**Finance**

Omega Instruments has budgeted $300,000 per year to pay for certain ce- ramic parts over the next 5 years. If the company expects the cost of the parts to increase uniformly according to an arith- metic gradient of $1 0,000 per year, what is it expecting the cost to be in year...

*May 26, 2013 by Aly*

**advanced biology**

chemical properties describe how a _____ changes into a new substance. This site will give you a definition and examples. http://www.elmhurst.edu/~chm/vchembook/105Achemprop.html

*August 19, 2007 by emily*

**chm**

The specific heat of fat is 0.45 cal/(g) , and the density of fat is 0.94 g/cm^3 . How much energy (in calories) is needed to heat 22 cm^3 of fat from room temperature (25 ^\circ {\rm C}) to its melting point (35 ^\circ {\rm C})?

*September 12, 2013 by Anonymous*

**physics**

can you help me to re-arrange this formula. i don't get it. V2^2= V1^2+2ad^2 I want to solve for a pls help

*October 18, 2011 by ted*

**Math**

Can u pls pls pls solve this algebraic expression?? I cant solve it although I tried many possible ways and solutions :/ 10+1/3[4k-(18+7k)]

*July 31, 2011 by Sally*

**science help pls pls**

Which of these surface features are formed when the acid in groundwater reacts with limestone? rivers and springs sinkholes and caves hot springs and geysers wetlands and volcanoes is it b pls help me

*April 12, 2016 by Oscar*

**math help pls pls pls**

Create an example of a polynomial in standard form. How do you know it is in standard form? pls help me

*March 20, 2016 by Oscar*

**Math! Pls Help!**

write a list of steps that are needed to find the measure of ∠B.

*January 25, 2016 by Talia*

**Physical chemistry**

A mixture contains n2o4 and No2 in the ratio 2:1 by volume what is the vapour density of the mixture.Pls answer the question i have been on the question for 2 hrs by now tried solving using mole fraction ideal gas equation an using the formula molar mass /2 but still couldn't ...

*August 7, 2014 by Rajiv*

**physics**

Two children on racing bikes start from the same reference point. Child A travels 5.0m/s{right} and child B travels 4.5m/s{right}. How much farther from the point of origin is child A than child B after 5.os? pls I really really need help. I do not understand it and I do not ...

*October 4, 2011 by ted*

**science**

What is carbon cycling? http://www.elmhurst.edu/~chm/vchembook/306carbon.html A thing made out of carbon. It is in a shape like a circle.

*June 14, 2005 by Josh*

**Chemistry**

How much energy in joules does it take to raise the temperature of 255g of water by 12.5 C? I just don't know which formula to use. Every formula I look at has 3 components needed, but I'm only given 2. Thanks :)

*November 4, 2016 by Aiyanna*

**math help pls pls pls**

Choose the correct simplification of the expression the quantity a to the 2nd power over b to the 3rd power all raised to the 4th power. A. a to the 6th power over b to the 7th power B. b^12 C. a^8b^15 D. the quantity a to the 8th power over b to the 12th power pls help me

*March 21, 2016 by Oscar*

**physics**

pls what is the formula for calculating period given gravity, mass and length of the material

*April 5, 2010 by fe*

**chemistry**

Pleas does any one know how to calculate the number of isomers of an organic compound. Any formula pls

*March 28, 2014 by ogboyeb*

**afrikaans (AFK503/101)**

Hi there, can anyone pls help me with AFK1503/101 - 2015. I am seeking an English version of this assignment pls, is there an English one available? if there is pls provide me with a website address to get access. Thank you. Tanya

*August 12, 2015 by Tanya*

**Physics**

A child pulls a wagon along level ground. The handle with which she pulls the wagon makes an angle of 20.0 degrees with the ground as the child pulls with a force of 78.0 Newton. What are the components of the force. Pls pls pls pls help me answer this and may God bless u!

*October 16, 2013 by Stephanie*

**math help pls pls pls**

Consider the functions f(x) = 2x + 1 and g(x) = x^2 − 10. What is the value of f[g(3)]? 39 −3 −7 −1 pls help me

*March 31, 2016 by Oscar*

**math help pls pls pls**

Four polynomials are shown below: A. 2 − 2x5 + 2x2 B. 5x3 + 5 − 5x4 C. 3x + 2x5 D. 6x3 − 1 Which of the above polynomials is a 5th degree binomial? Polynomial A Polynomial B Polynomial C Polynomial D pls help me

*March 21, 2016 by Oscar*

**math (if someone could show me the working pls)**

calculate the difference of the square using the following formula a^2-b^2=(a+b) (a-b) 1)28^2-12^2

*August 20, 2009 by keisha*

**science pls help**

i posted this earlier but got a confusing answer so pls help as best as u can asap! True or False 1. If a 40 kg person is accelerating at 10 m/s2, then the magnitude of the force acting on him or her is 400 N. (1 point) true false Multiple Choice 2. How much force is needed to...

*March 13, 2014 by TTR+S<3*

**Pressure and Molecular Formula**

2. How much potassium chlorate is needed to produce 20.0 mL of oxygen at 670 mm Hg and 20 degrees C. 3. A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this ...

*December 8, 2012 by Amy*

**chemistry**

why can I not use the formula m1v1=m2v2 for the following question: What volume of 1.20 M NaOH will be needed to neutralize 225 mL of 3.0 M sulfuric acid? I get 0.56 L but the answer should be 1.1 L. When am I able to use that formula and when can I not?

*October 18, 2009 by drew*

**algebra pls pls help**

Determine which polynomial is a perfect square trinomial. 49x2 − 28x + 16 9a2 − 30a + 25 25b2 − 45b − 81 16x2 − 24x − 9 is it b pls help me

*May 12, 2016 by Oscar*

**chemistry**

C4 H10 O or diethyl ether or with a formula of CH3CH2OCH2CH3 its stick structure is H H H H ! ! ! ! .. H-C-C-C-C- O-H ! ! ! ! .. H H H H I used the this ! sign as a sign for bond. pls help me to determine the geometry for each central atom in this structure. 1) C Trigonal 2) C...

*October 5, 2012 by chemdummy*

**chemistry**

In hydrated copper sulfate, the chemical formula is CuSO4.5H2O, while that of hydrated cobalt(II) chloride is CoCl2.6H2O. I want to ask how to determine the number of moles of water is needed to hydrate any salt. Is there a pattern or formula?

*November 8, 2013 by Hao*

**science help pls pls**

A scientific law can be best described as an explanation of a specific relationship a series of observations with contradictory data a phenomenon which works under changing conditions a description of specific relationships under given conditions is it a pls help me

*April 15, 2016 by Oscar*

**MATH gr10**

were having an exam soon, can you list all the formulas needed..pls? i might've missed some, i just want to make shure.

*June 14, 2011 by jakil*

**science help pls pls**

Which of these statements best explains why scientists use models? to allow other scientists evaluate their data to speed up or slow down natural processes to describe and explain non-observable objects and processes to predict the scientific theories which would be proposed ...

*April 12, 2016 by Oscar*

**Algebra**

a formula that can be used to find the diagonal length of any paper square and a formula that can be used to find the total number of triangles needed

*October 21, 2016 by willy pierre*

**chem**

Write the complete ionic equation for Cu(NO3(aq)+K2S(aq)and namd write the formula for the spectator ions in this reaction? This is what I got pls. check it: complete ionic equation: Cu^19aq)+K^1(aq)+S^-2(aq)=K^1(aq)+NO3^-1(aq)+Cu2S(s) net ionic equation: Cu(aq)+s^-2(aq)=Cu2S(...

*October 5, 2012 by Amanda*

**science help pls pls**

One group of scientists has proposed a new theory on Adaptation. A majority of scientists worldwide agree with the theory. The theory is most likely biased. incomplete. accurate. unchangeable. is it accurate pls help me

*April 28, 2016 by Oscar*

**Physics**

A stopper tied to the end of a string is swung in a horizontal circle. If a mass of the stopper is 13.0 g, and the string is 93.0 cm, and the stopper revolves at a constant speed 10 times in 11.8 secs, what is the tension on the string? I tried solving this question using the ...

*March 25, 2013 by Ted*

**VARIATION**

A rectangular brass slave has a square base of side x cm, and height h cm, its weight, w kg, is given by the formula w=(3x^2 h)/10. How is w changed if x is trebled and h is halved? (with solution pls... tnx...)

*January 9, 2013 by HELP HELP HELP MNHS*

**Chem**

Dear Dr., What formula is this? En = -Z^2RH/n^2 I saw you use it in one of your explanations. I know its been a few yrs since u last posted it. Pls help thanks! Yours sincerely, Johan

*September 24, 2014 by Johan*

**MANIPULATION OF DNA**

can anyone describe to me what this is pls? also can anyone pls explain how dna manipulation works and what it does pls?

*April 1, 2009 by GLORIA*

**physics.pls help**

How do you know what element is chemically active on the periodic table? PLS HELP

*October 5, 2011 by ted*

**math help**

1/4 divided by 3/8 pls help me im confuss i forgot the ste pls explain

*October 27, 2012 by Anonymous*

**pre algebra**

2x^2 + 8 - 4x + 3x - 6x^2 + 7 what does this simplify to A)-8x^2 - 7x + 15 B)-4x^2 - x + 15 C)4x^2 + x + 15 D)8x^2 + 7x + 15 pls help me reiny steve or damon pls help me

*March 23, 2015 by Oscar*

**math pls help me **

(-2y + 5 )(y + 3) what would this simplify to? A)-2y^2 + 8y + 15 B)-2y^2 - y + 15 C)2y^2 + 8y + 8 D)2y^2 - y + 8 pls help me steve or damon or ms sue

*March 23, 2015 by Oscar*

**math**

Pls i want you to teach me the 5 90 lotto formular pls i need it now

*September 30, 2015 by abiodun*

**food science**

pls give me an idea on the formulation of bavarian cream filling. pls. thank you

*January 4, 2008 by vcq*

**Science(Help NOW, Pls)**

wat elements make up water? pls help! i will be very happy if you do! :S

*December 15, 2010 by GirlSense*

**physics.pls help**

Why is it important to asaume that a rope under tension is taut and does not stretch. pls help

*November 14, 2011 by ted*

**science help pls pls**

Which of these is the most practical method to prevent global water shortage? Stop planting trees and shrubs in gardens. Conserve, recycle and reuse water in households. Stop using appliances like washing machines and dishwashers. Discourage setting up of power plants which ...

*April 11, 2016 by Oscar*

**science help pls pls**

Dams are used to produce hydroelectric power. Which of these best describes the impact of a dam on the environment? It causes air pollution. It reduces the level of groundwater. It causes changes in the river ecosystem. It reduces the level of oxygen in river water. is it c ...

*April 12, 2016 by Oscar*

**Chemistry**

the formula H2O2 is an example of 1.molecular formula 2. an empirical formula 3.an ionic formula 4.an organic formula

*November 28, 2010 by tia*

**math help pls pls pls**

A company is deciding whether or not to hire a new worker. The company must pay the worker hourly and cover a daily cost for insurance. The cost to pay an hourly worker for one day is represented by the function y = 8x + 25, where x is hours. What is the y-intercept, and what ...

*March 18, 2016 by Oscar*

**Science(Help NOW, Pls)**

organisms in which domain live in every environment? pls help, im stuck on this one. :S

*December 15, 2010 by GirlSense*

**physics.pls help**

A 100g bird sits in its nest. what is the Fnet(net force) in this case? pls help

*November 10, 2011 by ted*

**Algebra (variation)**

A rectangular brass slave has a square base of side x cm, and height h cm, its weight, w kg, is given by the formula w=(3x^2 h)/10. How is w changed if x is trebled and h is halved? (with solution pls... tnx...)

*January 9, 2013 by HELP HELP HELP MNHS*

**chm I**

Lithium hydride reacts with water as follows. LiH(s) + H2O(l) -->LiOH(aq) + H2(g) During World War II, U.S. pilots carried LiH tablets. In the event of a crash landing at sea, the LiH would react with the seawater and fill their life belts and lifeboats with hydrogen gas. ...

*June 29, 2011 by lynn*

**(pls help) algebra**

4x+y-32=1, 6x-y-4z=7, 10x+2y-6z=5 pls show me how to solve for x,y,z. Ans:xx=1.5,y=-2,z=1

*July 8, 2013 by david*

**chemistry**

hi, I am wondering if benzyl acetate is polar or nonpolar? because it has a non polar benzene ring but also it has the ester bit attached so i am confused. Also i cant seem to understand the vander waal forces that are in it. if anybody could help that would be super A little ...

*December 18, 2006 by steff*

**chem**

an energy value of 3.313x10^-19 joules is needed to break a chemical bond. what is the wavelength of energy needed to break the bond? (the speed of light = 3.00x10^10 cm/sec; planck's constant = 6.636x10^-34 J . sec is there a formula i'm missing? Formula (memorize this) ...

*April 21, 2007 by ashley*

**e commerce or marketing, help pls**

hi,good evening everyone can you help me on finding a clothing manufacturer resource system??? pls thank you

*December 6, 2011 by need ASAP*

**Algebra help pls fast**

How do you Find the lateral area of a square pyramid. base:8 Height:22. and side:8 Help pls

*January 8, 2016 by Laura*

**Math**

Use the quadratic formula to solve the equation. x² - x = -2 Type an exact answer, using radicals as needed. Express complex numbers in terms of i. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)

*April 24, 2011 by Mary*

**Chemistry**

rank the following atoms and ions in the order of expected increasing radius: Ca, Ca2+, Ar Pls pls help me kindly... Anyone?

*November 18, 2012 by Anonymous*

**PLS HELP ME WITH ONE MATH QUESTION!!???**

pllllsssss help me!!!!!!! 5. How many lateral edges are there in a triangular prism? (1 point) 6 3 9 12 I don't know if its 6 or 9 or even 12!!??? pls help asap!!!!!

*February 19, 2014 by TTR+S<3*

**Pre-Algebra Help pls fast**

How do you Find the lateral area of a square pyramid. base:8 Height:22. and side:8 Help pls

*January 8, 2016 by Laura*

**algebra pls pls help**

The equation f(x) = 4x^2 − 16x + 9 represents a parabola. What is the vertex of the parabola? (2, −7) (−2, 57) (4, 9) (−4, −137) is it a pls helpme

*May 12, 2016 by Oscar*

**CHM 300**

if the pKa of HCN is 9.21,what it its Ka?

*October 1, 2014 by Nurcan*

**math - pls check!!!**

Write an equation in point-slope form for the line that passes through one of the following pairs of points (you may choose the pair you want to work with). Then, use the same set of points to write the equation in standard form and again in slope-intercept form. (5, 1) and (-...

*January 13, 2015 by SkatingDJ*

**Help pls. **

Compute the acceleration of the block sliding down a 30 deg inclined plane if the coefficient of kinetic friction is 0.20. Show solution pls.

*August 23, 2014 by Yan-yan*

**LA --- 1 question pls help!!!**

hi, one question based on the short story called, "Cyber Chitchat" this one confuses me, pls help if u know the book! 8. The tone of "Cyber Chitchat" is (1 point) serious. humorous. depressing. angry. i think its humorous but im not so sure..... pls help asap!!!!! thanx in ...

*March 2, 2014 by TTR+S<3*

**science help pls pls pls**

A new object, Object Y, was discovered outside our solar system. Object Y is small and rocky, is not a satellite of any other object, and it does not have enough gravity to clear away smaller objects near its orbit. The characteristics of Object Y most closely resemble those ...

*April 15, 2016 by Oscar*