# Chemistry.. help plz

61,074 results

### LIVING ENVIRONMENT

the ability to grow in size is a characteristic of living organism .Although an icicle may grow in size over time,it is considered nonliving because there is 1)an incerase in matter ,but no increase in the number of icicle. 2)an interaction between the icicle and the ...

### math

identify the value of x that makes each pair of the ratios equivalent x:4 and 45:20 A.8 B.9 C.10 plz plz plz plz help me!!!!!!!! PLZ!!!!!

### I NEED HELP!!:(!!!! HELP ME PLZ!!

I GOT A FEW QUESTIONS SO what is a cell part that has the funcion of a gel-like material inside cells... and what releases energy into the cell.?? plz plz plz plz HELP!!!

### math plz plz plz plz help plz .....thank you

mark bought a notebook for $1.45 and some pencils that cost $0.42 each if the total cost was 6.91,how many pencils did he buy A.12 B.13 C.14 D.15 is 14 the answer plz help thank you

### social studies? i think idk

what new ideas came from the automobile? plz help plz plz plz ASAP

### Math ....urgent help

i just don't get this elimination method ..... plz help me plz.....teach me how to keep the x and y in a parallel line. and which number to multiply.....plz help -5x-4y=-11 10x=-6-y help me plz......

### SS plz help me plzzzzzzz

What are the two major forces that reshape earth? Describe how itworks. plz plz plz help me there are no answer choices hope u can still help

### SS PLZ HELP ME ASAP

What are the two major forces that shape and reshape earth? Describe how each one works. plz plz plz help me there are no answer choices hope u can still help

### biology

a boy inherits genes for tallness,but his growth is limited as a result of poor nitrition. this is an example of 1)an inherited disorder. 2)environmental influence on gene expression . 3)expression of a hidden trait 4)a characterstic controlled by more than one pair of genes. ...

### Chemistry chlorine plz help

A metal x forms two different chloride.if 12.g of chloride A and 16.3g of chloride B contain 7.1g and 10.7g of chlorine respectively,show that the figure agree with the laws of multiple proportions.write there formulea plz i need the work....no hint plz

### plz plz help me belive me have tried

cosx+cosy=a and sinx+siny=b show that sin2x+sin2y=2ab(1-(2/(a^2+b^2)) plz plz show step

### Geometry i need help urgently plz plz plz

The lenght of a line segement is of 10units and the co-ordinate of one end point are (2,-3) if the abscissa of the other end is 10 find the ordinate of the other end?? Working plz plz

### calculus help me plz too hard show step

charge Q coulombs at time t seconds is given by the differential equation RdQ/dt+Q/C=0, where c is the capacitance in farafd and R the resistance in ohms.solve the equation for Q given that Q=Qo where t=0 plz show step plz plz plz

### math

the volume of a rectangular solid is given by expressions given below.in each case find the dimentions of the solid. a)15x^2-51x+18. b)x^3+13x^2+32x+20. c)x^2-5x/2-3/2. d)x^4+x^3-x-1 plz everyone help me out.till 2 o'clock...plz plz plz

### math

the volume of a rectangular solid is given by expressions given below.in each case find the dimentions of the solid. a)15x^2-51x+18. b)x^3+13x^2+32x+20. c)x^2-5x/2-3/2. d)x^4+x^3-x-1 plz everyone help me out.till 2 o'clock...plz plz plz

### maths plz

∫√(x²+1)/(x+1)dx plz show step i know it messy plz i really need it

### pscychology

Could someone pretty plz plz plz help me...What are the 2 biggest parts of the human brain??

### SCIENCE!!--ANONYMOUS PLEASE ANSWER MY QUESTION!

plz answer the question we were talking about plz plz. Go back to the problem. I got 184 but the worksheet answer says 136 which is correct?? plz help!! thx

### Maths plz help

X^x+y^y=31 x+y=5 plz help i was told to use newton litrate method plz help

### chemistry need help so bad seriously help plz

Use Rydbuz equation to calculate the wavelength of the third line in the paschen series of the hydrogen spectrum.give ur answer in Nm. RH=2.18 * 10^-18j, H=6.63 * 10^-34J. Plz help m

### social studies idk

how did the automobile negatively impact society???!!!?!?! PLZ help me I have been on it since morning plz pretty plz cherry on top help me

### physics!! plz answer me!

A 0.15 kg baseball moving at +26 m/s is slowed to a stop by a catcher who exerts a constant force of -390 N. How long does it take this force to stop the ball? How far does the ball travel before stopping? plz plz plz help!!

### maths

plz i cerious need help i posted dis qustion bt due 2 my wrong typing it was nt anser plz here it is:x^4+3x-2/(x^2+1)=Ax+B/(x^2+1)+Cx+D/(x^2+1)^2+(Ex+F)/(x^2+1)^3+G/(x-4)+(Hx+1)/(x-4)^2.find ABCDEFGH? plz it a partial fraction thank yo u and Godbless u

### chem

stilll didn't get it .. .. can u plz explain in detail ... how did u get the answer.. plz plz plz plz plzp l zp thnks Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj/mol S=O = 523 kj/mol Use average bond enthalpies ...

### maths

sir steve plz am a little confuse (x-y)³=A(x+y) prove that (2x+y)dy/dx=x+2y if y is a function of x and x=e^t/(e^t+1) show that dy/dt=x(1-x)dy/dx plz explain to me very well sir damon answered that but i still dont get it If u want me to show my work i will do it sir plz plz ...

### Ms.Sue (ONLY)

can you plz help me in science? PLZ HELP ME! YOU HELP ALL THE TIME! *begs* plz help! i am my knees!!!!! (really i am!) its called "science 8th grade"

### grade 10 history

I have a SUPER HUGE project due called National History day and need lots of help with it, plz plz plz help!!!!!

### Plz,plz help!

Can you help me write: real-world scenario in which you would write an inequality rather than an equation? Plz, I really need help! :D

### maths sir steve plz reiny plz sir damon plz help

express 1.1 in surd form pllllllz step

### Calculus i need help plz plz

Integrate:Sinxcosx/a^2cos^2(x)+b^2sin^2(x))dx??? plz i need the full working too hard for me

### math plz help ;-;

What is the y-coordinate of the y-intercept of the linear equation 2x - 3y = 12? Plz help I don't understand how to do this can you show me step by step plz, sorry ;-;

### maths sir steve plz reiny plz sir damon plz help

express 1.1 in surd form pllllllz

### Calculus i need help plz plz

If y=ws^3/d^4 find the % increase in 'y' when 'w' increases by 2% and 's' decreases by 3% and 'd' increasee by 1%...... There a little error in the first question i post here it is plz i need the working and explanation

### calculus too hard

the velocity of a chemical reaction is given by dx/dx=k(a-x) where x is the amount transfered in time t,k is a constant and a is the condition at time t=0 when c=0 solve the equation and determine x in terms of t? Plz show work plz plz

### math

A water balloon is shot into the air so that its height h, in metres, after t seconds is h = —4.9t^2 + 27t + 2.4 a)How high is the balloon after 1 s? b)For how long is the balloon more than 30 m high? c)What is the maximum height reached by the balloon? d)When will the ...

### math

You want to cover a trapezoidal box with paper. You have a sheet of paper that is 1m by 500cm. What is the size box that can be made with minimal wastage? plz plz plz help me with this.. i don't understand how to do this

### Physics plz

Do any teacher here have an email plz becouse I want to send some pictures for question ,,, physics plz or how can I attach picture here ????

### Function plz help!!!

If a function u(x,y)=arctan(y/x) deduce the laplace equation of the function. plz show working i don't no where to start from...plz thanks

### Chemistry!!! PLZ PLZ HELP!!

Calculate the equilibrium amounts of each susbtance in the reaction below if an initial amount of 0.1 moles of H2 are brought together with an initial amount of 0.2 moles of I2 and then equilibrium is established at 900K. Kc at this temperature=70. H2 + I2 <-> 2HI

### sir damon help plz steve plz chip into these

An airplane ✈ makes a turn which has a banking curve of 30° to the horizontal with a radius 5m, in 10sec, what is the mass of the airplane, if it has a force of 500N. The power the plane travelled with, and what's the speed of the airplane when it made its turn?? Plz show ...

### bio check plz plz plz

in human (2n=46) mitosis result 2 cell with 23 chromoses and meosis result in (n=23) 4 cell with 46 chromoses... is this statment true ? please help me ....

### SCIENCE HELP PLZ HELP PLZ

Which is one advantage of sexual reproduction? A. More offspring are produced ** B. More offspring survive to maturity C. The offspring have more genetic Variation D. The offspring and the parents are identical. PLZ HELP ME IS IT A?

### Urgent Chem help plz

is answer +103 KJ.. plz chk Plz explain in detail.... i tried to search on internet but i am confused with co-efficents.. how to set up the equaiton .. plz help me ??? Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj...

### sir steve sir reiny any 1 plz help me maths har

Question. Find the greatest common divisor d of 159 and 51, and find integers x and y solving the equation 159 x + 51 y = d . Answer. d = 3. The extended Euclidean algorithm gives x = 9 and y = -28. (There are other solutions for x and y; these are not unique.) plz show step ...

### Calculus also need help plz plz plz

If z=1/(x^2+y^2-1) is x(dz/dx)+y(dz/dy)=-2z(1+z) or -z^2(1+z) note:dz/dx=partial derivative of x and dz/dy=partial derivative of y??

### calculus plz help me

Show that the numerical value of the radius of curvature at the point (x1, y1) on the parabola y^2=4ax is [2(a+x1)^3/2)]/a^1/2. If c is the centre of the curvature at the origin O and S is the point (a, 0), show that OC=2(OS) plz show me working plz

### social plz...................help me plz.........

Name the 6 seas of the " Fertile Crescent" / Middle East?

### math

in the given figure,QRSis a straight angle.If a=2c,c=2b,b=d/3,what is the value of d?plz help me plz

### sequence help plz

5+11+17+23 +... Find the sum of the 2n term of the series plz help me show step

### Math plz help

Which rational number is equivalent to 3.90 with the .90 repeating? A. 3/90 B. 39/10 C. 35/9 D. 43/11 EXPLAIN PLZ

### Algebra

Plz help me! -12 divided by 3 •(-8 + (-4)^2 - 6) + 2 My teacher said the answer should be -6. But I don't know how to get to it. Plz Help!

### PLz help

How was society before the automobile was invented plz help me I need it for my powerpoint

### calculus plz help me

integrate:dx/((x-1)sqrt(x^2-2) plz show solution i plead

### Science

idont understand anything about the big idea of energy plz plz Help

### Trigonomentry plz help

tanA=ntanB sinA=msinB find cos^2A in terms of 'm' and 'n' plz help

### Science

Plz HELP me !!!!! I need to know a acrostic poem about safety plz help me it is due tomorrow

### maths calculus need help plz

solve d^2y/dx^2+y=tanx show working plz i don't no it at all

### help maths

plz help plz help if z=x+jy,show that the locus arg{(z-1)/(z)}=pi/6 is a circle.find its centre and radius

### local and state gov.

someone plz i really need help plz i cant find it in my text so someone plz!!! For a democracy right??? search google: branches of Government Click Bens Guide to Government for kids (1st or 2nd link) Then when you get there select your grade level in the ballon... This shows ...

### Math

Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

### Math

Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

### Math

Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

### Physics

Plz plz answer this question..... "what is ment by the energy-mass relationship?explain it with the help of examples.....

### maths plz help

Find the directional derivative of: âˆ…=(x+2y+z)Â²â€”(xâ€”yâ€”z)Â² at the point (2, 1, -1) in the direction of A=iâ€”4j+2k. Plz help show me work

### SS HELP PLZ!!!

How do mountains influence where people farm in the Koreas? I've looked in my book and couldn't find anything... HELP PLZ!!!!!

### SS Help...

What are 4-10 (or More) pros and cons Of Spending Cut? PLZ Just Give Me A Few Suggestions, PLZ!

### math need help plz

1/3+(-5/6)+(-1/2) can u help me solve this plz by using steps. thank u

### Maths plz help!

4x^2+8x-m=0,differs by 3 find the value of the constant m plz help me??

### social.....plz help

what are the major battles of the persian warsin greece. For each battle include the victor. and the dates......plz help

### geogrophy

Plz define the Gadani beach in paragraph minimum 100 words plz i got marks.

### US HISTORY PLZ ANSWER MY QUESTION

name 1 person that was influential to delaware when it was first founded. plz n thnx!

### physics(URGENT!!!!!)

EDXers!!! Plz help with MITx 8.01x I don't know how to solve HW8 Problem 3 Question c) Can anybody help me???? Explain Plz

### number base help plz

plz solve for me too hard show step payuto 123_(base4) = N_(base8 )

### SCIENCE PLZ HELP YES OR NO ANSWER

DOES THE GALAXY ANDROMEDA HAVE A SUN? I THINK IT DOESN'T BUT IM NOT SURE PLZ HELP THX! ~Sparkles_01

### maths plz help

give the expansion sin^8@ as a series of cos@ plz help me show working where @ means theta

### Physics Help me Someone plz

If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6 Thatz still wrong Physics...

### sociology

hi people actually i need 2 do a project on sociology for 20 marks n i cant decide which on a topic ca u all plz help n v also need 2 have a survey or 30-40 interviews plz plz plz plz help its urgent It would really help us teachers if you would write in standard English so we...

### geometry

a cylinder water tower is three-fourths full of water.the tower is 24 feet tall and has a diameter of 28 feet.how much water is in the tower now? CAN SOMEONE PLZ PLZ PLZ HELP ME

### plz help me

Create a paragraph answering these questions: What were the benefits to society from the automobile? How was life easier? What changed? plz help me damon or anyone else

### Trigonomentry help plz!!!

Sin3A=3sinA-4sin(x/2)^3 find x interms of A? PLZ show working got no ideal at all

### physics

Plz plz answer this question..... I need this immediate.... "what is ment by the energy-mass relationship?explain it with the help of examples.....

### social studies plz help.

does anyone have some answers on the new south west asia unit test!!!! plz help.

### help plz

some1 help wit my current post plz;)

### math

Ms.plz i have school tomorrow plz.its my H.W.

### Science

I need to observe and identify variables and I'm in 6th grade!!! Help, this work is killing me....It's scenario 1-4 and I have Mr Jones plz help plz

### math miss.sue can u plz check me answers plz

which of the following appears to be an irrational number? A. 3.7272727272... B. the root of 64 C. -6/25 D. 0.73303330...

### Maths equation plz help urgently

0^x=100? Please help can complex number help plz show working find x i really need it

### calculus help me plz

integrate:dx/((x-1)sqrt(x^2-2) a tutor here direct me to a page but i do not know how to use it i tried but it did not show me any step...i need help plz

### Health PLZ HELP ASAP

There are four communication skills that have been proven to be very effective when sharing information. The four skills are: using "I" message, active listening, assertiveness,.....(I have to figure out the last one) A, Aggressiveness B, Body Language C, cooperation D, ...

### calculus-help me sir~steve

show that 2f''(t)-f'(t)-f(t)=sin(t)-cos(t) where f(0)=f'(0) has the solution (-2/5)e^(-t/2)-(1/5)sin(t)+(2/5)cos(t) using laplace tranformation plz plz plz show step by step

### social.......urgnt plz.........

can anyone tell me any one place of the ancient greece.....and what were its movements?? and what comes under human - envorinment interaction??? plz........help

### MATH MID TERM TOMM PPL PLZ HELP

how do u draw an asymtote ? diff btwn set and interval notation? and example plz

### history

1. How does their sovereign status as nations affect how Native American tribes make treaties? plz help this is the only grade I have an F on so PLZ

### PLZ HELP PLZ PLZ PLZ JUST ONLY 1 QUSTION!!!!!!!!!

A carrier is a person who has __________? A; one recessive and one dominant allele for a trait. B; two recessive alleles for a trait. C; two dominant alleles for a trait. D; more than two alleles for a trait.

### Lang. Arts PLZ HELP!!D:

I need some info about how the building of dams effect whitewater activities such as kyaking and conoeing..!!!plz help

### ingqayizivele high

Am doing math lit ,geography,history n life sciences I dnt knw which career to choice can u plz help me .cal m 4 help on 0625113520 plz

### PLz help Bob

PLz help see below

### Math

F(x)=x^2-2x-3 plz help me slove this ? HELP ME I DO NOT UNDERSTAND THIS HELP ME PLZ

### Calculus help plz

Evaluate in (cuberootof(x+1)/(x-1)).1/(x+1)dx help plz