Number of results: 92,707
Chem(PLEASE CAN SOMEONE EXPLAIN HOW I CAN SOLVE)
calculate the molarities of each of the ions in a solution prepared by diluting 78mL of 4.5M Ca(ClO3)2 (aq) to 156mL with water. I dont understand how to answer this question.
October 26, 2011 by amy
How do I solve these inequalities: e^3x>e^x-1 -6log (subscript of 4) x > -24 & how do I solve these: 8^x+1=3 e^x+2=50 8logx=16 I really don't understand how to solve these so can someone please explain them to me?
April 17, 2014 by Linda
How can the concept of specific heat capacity of water be used to explain the heating and cooling patterns if the oceans and the climate on the planet?? Can someone please explain this to me it would really help a lot.
January 27, 2013 by Emily
Algebra II- please help!
I just cannot seem to be able to grasp the concept of solving polynomial inequalities. Can someone please explain, step by step, how to solve them? Here's a problem I can't solve. Please use this as an example: (x-2)(x-5)<0 I cannot thank you enough for helping me with this...
December 10, 2008 by Erin
solve equation then check for extraneous solution please someone explain this to me. 6/6-4x/=8+4 then one that is solve the inequality s/x+3/4<2 I don't understand these problems and then it says to graph
August 26, 2012 by kevin
A secondary alcohol results from the attachment of a hydroxy group to which carbon atom? C | <---GIVEN STRUCTURE C1-C2-C3-C4 A) C1 B) C2 C)C3 D)C4 Answer is C! I have to explain why, but the teacher never taught us anything about organic chem. So please explain!
April 5, 2013 by Anonymous
Can someone please explain how to solve 3x^2+7x-15=0 by using the quadratic equation? I know that the equation is: ax^2+bx+c=0 but I get confused about how to set the problem up and solve. Thanks.
September 26, 2009 by B.B.
12a^3bc-18a^2bc^2+6a^2c, x^2+20x+36, 12x^4-8x^3-4x^2, x^2+36x, 9x^2+6x+1, 6x^3+11x-10, x^2+3x-6..............can someone please help me solve some of these problems if not all. I have forgotten how to solve them can someone please help..Thanks
September 2, 2008 by Carrie
for 2Al2O3----> 4Al(s) + 3O2 the question is what is the heat change for the formation of 1 mol of aluminum oxide from its elements? Al2O3:-1676.0 O2:0.0 Can someone please explain how to complete this problem step by step please??
January 22, 2013 by sara
Can someone please help me with math problem and explain to me step by step how to solve it so I will know how solve other problems like this Thank you in advance Multiply and then, if possible, simplify by factoring /7x /21y
February 28, 2012 by Anonymous
I don't understand what to do at all, I've several like this if someone could explain this one i could maybe undersatnd what to do with the rest. Thanks!! "Factorise, then solve the equation x^2=5x-36=0 then explain how you could use your answer to solve 5x^2+25x-180=0 What ...
March 7, 2011 by Susan
what is the surface area of a square pyramid if the slant height is 15.2 m and the base is 15.2 m? please explain it to me. this is not homework, it is a practice question and I do not understand how to solve it. Someone PLEASE help!
February 20, 2014 by #1Student
solve equation (x+1)(x-2)=54 Eric stated that the solution would be (x+1)=54==> x=53 or (x-2)=54==> x=56 However at least one of these solutions fails to work when substituted back in the orginial equation. Why is that? Please help Eric to understand better, solve the ...
June 18, 2012 by ladybug Please Help!!
Could I have someone check my work please? If I did something wrong please explain to me where I went wrong. Thank You. Example of the product rule to solve would be, (5^3)(6^3) Example of the quotient rule to solve would be, (4^2) / (8^2) Example of the power rule to solve ...
July 18, 2010 by Lynn
The solubility of AgCl(s) in water at 25 C is 1.33x10^-5 M and its deltaH of solution is 65.7 kJ/mol . What is its solubility at 60.1 C ? Please explain how to solve for this!!
March 22, 2013 by Lena
solve (Z^2)+5=-4/Z^2 how do i solve it?? the answer is +2or-2, or, +or -i. but i really dont know how to get this answer.i tried to multiply both side by Z^2, but i think it just made it more comlicated and i didn't get the right answer at the end...can someone please explain...
March 12, 2008 by Anne
line BD bisects angle ABC. Solve for X and find the measures of angle ABC. angle ABD= 5X, angle DBC= 3X + 10 I don't really understand this question so can someone please help me solve this and explain to me how they solved it/ show the steps of how to solve this question. ...
September 2, 2014 by Tonya
Q: Corbin is playing a board game that requires rolling two number cubes to move a game piece. He needs to roll a sum of six on his next term and then a sum of ten to land on to the next two bonus spaces. what is the probability that Corbin will roll a sum of six and then a ...
March 9, 2013 by dingbat
math 012 please help explain
can someone please help explain how to do this problem. i have a previous posting where i tried to work the problem out, and someone tried to explain where i was confused, but im still confused. 4(2n+1)=3(6n+3)+1
February 1, 2009 by amy
Can someone please explain to me what was John Dalton's experiment that led to his atomic theory? I know it's the electrolysis of water, but I'd appreciate if someone could explain in detail.
February 15, 2015 by Lucina
PLEASE HELP ME MATH
someone please help i hav posted my questions like 5 times and no one is answering, can someone please solve these inequalitys 6y+1<19 2r-8>6 b-5>-2 2y+1<-5 4x-6>-10
March 18, 2008 by Julie
2H2(g)+O2(g) ---> 2H2O(l) delta H= -572kJ/mole of O2 Calculate the amount of heat evolved when 10g of hydrogen are burned in excess oxygen. Can someone please explain step by step? =D
July 15, 2012 by Shirley
Math SOmeone please please help
Find the derivative of the function. g(u) = (5+u^2)^5(3-9u^2)^8 Could someone please explain the steps that would lead me to the answer? I'm completely stuck.
February 21, 2011 by Anonymous
I dont understand how Rutherford's gold foil experiment proved that the positive charge of the atom had a very small volume in comparison to the whole atom. Could someone explain this to me please?
July 9, 2009 by Lena
How many kilojoules of energy are released from the carbon carbon single bonds when glucose (C6H12O6) is burned??? i asked this before but i dont really understand it any better. can someone please explain it differently thanks
September 6, 2009 by jake
I need help with proportions. Can someone explain to methis whole mn=pq thing or x/3=4/6 I don't understand how to di it. Please help! :) m is to n as p is to q. m/n=p/q you can solve for any of the four in terms of the others: m= np/q p=mq/n n=mq/p q=np/m
May 27, 2007 by Avalon
A ball is kicked at an angle of 50 with a velocity of 14m/s. a. how long is it in the air? b. how high does it rise? can someone please explain to me how to solve this???
October 21, 2008 by Lauren
Hi could someone please explain to me how i would use the chain rule dy/dx = dy/du(du/dx) to solve for y= sin(x+y) - im looking for dy/dx i don't understand the steps thanks
March 21, 2009 by sarah
Math help please
1. Solve for x. 4(x - b) = x b = 4/3x b = 3/4x x = 4/3b x = 3/4b 2. Solve for y, then find the value of y when given x = 2. 6x = 7 - 4y -12 7/4 19/4 24 I need help solving these. Can you please explain how to solve these problems?
October 2, 2013 by Charlotte
I am in dire need of some help I am not understanding this at all I am to solve the systems of equations by graphing 2x-y=14 2x+3y=-10 Could someone please explain this to me in dummy terms
June 26, 2008 by Anonymous
Solve this 5y+4x=4. Can someone please help me solve this step by step. I am learning,but It always helps clear things when things are explain. However, I am grateful for any help anyone can provide me. Thank you so very much. Your help is always appreciated.
January 18, 2011 by Esther
can someone explain the leveling effect in chemistry or provide a good link please? in my chem book it says something like HNO3<H2SO4<HCl<HBr<HI<HClO4 but i dont get why they are greater/smaller
August 5, 2011 by Henry
Which pair of reagents will take part in a redox reaction? A CH3CH2OH + concentrated H2SO4 B CH3CHO + Tollens’ reagent C CH3CO2C2H5 + dilute H2SO4 D CH3COCH3 + Fehling’s solution Ans: B Someone please explain! Thanks! :)
September 30, 2014 by Ariana
so we did a chem lab and one of the questions is to tabulate the amount of S2O3 consumed in moles and times (sec) for each run. I'm just not sure how to calculate the amount consumed. Can someone please explain how?
February 1, 2014 by Anonymous
Biology....someone who can explain something to me
can someone explain the Miller-Urey Experiment to me? I've read it again and again and I just don't really get it. Please help me out here.
February 5, 2013 by Corie
could someone tell me how i could solve this chem equation CH4 + NH3 +O2...> HCN +H20 AND USE THE LOWEST WHOLE NUMBER COEFFICIENT i WOULD BE GRATEFUL FOR ANY POINTERS Try these coefficients. 2,2,3==>2,6 Hi bex heres a little more help for you. Answer is 2CH4+2NH3+3O2--&...
May 6, 2007 by bex
actually, in a addition to the question i posted a few minutes ago, can someone please help me with a few actual specific questions? thanks so much i'm very confused and i've been working on these all day. *Literal Equations* ~solve for x ax + bx = 8ab ~solve for y my - ny = m...
October 26, 2007 by kim
So, for this one, it is 2x-14=3x+6 Can someone please explain to me how they would solve this problem? I think you would add 14 to the 6, but I'm not sure..
October 19, 2010 by Allyson
can someone please help me solve the question and explain to me and also show me specifically what to do step by step??? Q: what is the standard form of Y-8=2(x+2)?
November 9, 2013 by Catarina
Math ; please please help.
1. Explain in detail how to determine the value of the independent variable in a quadratic relation if the value of the dependent variable is known. Please check my answer - You would substitute the value for the dependent variable, then you would solve for the independent ...
April 9, 2008 by Amanda
5th grade math (word problems)
I'm not sure how to solve the following problem. I don't think i have enough information. Ali deposited $120 in her savings account. This represents 75% of the money she received for her birthday. She pent the rest of her money on a lego toy. How much did the lego cost? Can ...
March 7, 2013 by Alex
Chem Help Please!
In most cases with GLC the area under the peak as a % of the total area for all peaks is interpreted as representing the % mass of the compound measured in the mixture. Explain why this is only an approximation. I've tried to find the answer online but couldnt so can someone ...
October 4, 2014 by Anonymous
The point (0,1) has the distance ____, from the line defined by y=-2x-1 How do you solve this? I tried the pythagorean theorem but I don't think I did it right as I came out with the square root of two. Can someone please explain this to me.
October 7, 2010 by math
P + 5C2H5OH + 5/2 I2 ---> 5C2H5I + H3PO4 + H2O m(P)=4.14g m(C2H5OH)= 27.5g m(I2)=63.5g m(C2H5I)= 73g Whats the percent yield of the reaction? (Can someone more precisely explain how to solve the problem please)
February 8, 2013 by Anonymous
Physics Someone help please!
An example of the neutron absorption reaction is . 1 0 n+10 5 B-->7 3 Li+ 4 2 He The rest masses of each particle in atomic mass units (u) are 1 0 n= 1 u 10 5 B=10 u 7 3 Li =7 u 4 2 He= 4 u where 1u=1.66x10^-27 kg. calculate Q Q= in MeV I have the same question please ...
May 8, 2013 by Amy
math/ algebra 1
can someone please help me explain how they got this answer and can someone please show me the steps into solving this question? Q: Four more than the quotient of a number and three is at least nine.
November 10, 2013 by ellie
Can someone please explain on how to solve this equation so I can do the others that are similar to this one? Find the solutions of the equations that are in the interval [0,2pi) cos x cot^2 x= cos x Thank you!
May 9, 2015 by Anonymous
Physics help please!
Explain why the sum of the masses of the uranium nucleus and of the neutron does not equal the total mass of the products of the reaction. I guess its a theory question. Someone please explain!
September 12, 2014 by Ariana
physics help please!!!
The tires of a car make 63 revolutions as the car reduces its speed uniformly from 94.0 km/h to 58.0 km/h. The tires have a diameter of 0.88 m. What was the angular acceleration of each tire? And If the car continues to decelerate at this rate, how much more time is required ...
March 26, 2010 by Anonymous
HELP! PHYSICS LABS!!
CAN someone please help me...I am so confused and I have little time left to do my assingment, please! I am freaking out! Please help me!! Can someone please explain why when the centripetal force increases, so does the radius, and why when Centripetal force increases, so does...
October 2, 2007 by Cooper-Nichol
Chem (Specific Heat)
I am confused as to how to solve this problem. Can someone please tell me the steps? I know SH = heat/ mass x change in temp. What is the specific heat of a metal if 7.74 × 103 J of energy is required to warm a 75.0 g sample of the metal from 10 °C to 125 °C? THanks -MC
February 6, 2014 by mysterychicken
my teacher gave me exam review booklets and there is something i dont understand.. the question is : Find the slope of a line that passes through the points (-9,-3) and (-7,-1). if someone can please explain to me how to solve this it would help majorly ! :)
January 27, 2011 by HELP exam review !
Can someone please explain to me how to solve logarithmic equations? Some examples are: -5=log2X 3^5x+1= 40 and log6X+(log6)7=(log6)35 I hope that makes sense because logs are hard to type.
April 18, 2008 by JaneLee
pre algebra help
9. how you would convert the repeating, non terminating decimal to a fraction? explain the process as you solve the problem. 0.1515 I dont understand this question can someone help explain this?
September 21, 2014 by jaden
I am suposed to apply L'Hospitals rule to solve. I can't seem to solve it tho. could someone explain the steps to me? Thanks! the limit as x approaches infinity of: xe^(1/x)-x This is what I got so far: xe^(1/x)-x x(e^(1/x)-1) e^(1/x)-1/(1/x) Now its in the right form to solve...
April 14, 2009 by Riley
a number is less than one fourth of the sum of three times the number and four. can someone please explain to me how they got this answer and can someone please show me each step.
November 10, 2013 by morgan
There are 2 hats, 3 scarves, and 3 pairs of mittens How many different combinations of 1 hat, 1 scarf, and 1 pair of mittens? How would I solve this, other than writing out each combination? Could someone please explain how?
October 11, 2010 by Amy
I need help on my math question. can someone please explain the process? You have $5 for lunch. You bought a turkey sandwich for $2.25. Write and solve an inequality to show how much more you can spend.
May 20, 2014 by jelly bean
please help someone explain this please!! The length of a marathon is 138,435 ft.each stride,or step,by a particular runner is 3 ft long.does the number of strides the runner takes fit evenly into the length of the race?(EXPLAIN ANSWER PLEASE) --------------------------- IS 38...
November 21, 2013 by matt
You have 20mL of a solution of concentration 0.015mg/mL of x in test tube #1. Prepare serial dilutions of your stock solution, and calculated the concentration of x as follows: Add 10mL of distilled water and 10mL of stock solution from test tube 1 to test tube 2. Add 10mL of ...
November 3, 2010 by Jon
Could you please explain how to use a matrix (matrices) to solve a system of linear equations (two variables)? My book doesn't explain it in a way I can understand. Please and thank you.
January 24, 2013 by Caroline
Simplify this expression (DO NOT solve for x) 5x+6(x+2)-8(x-3) I have no clue, can someone tell me how to solve it? Please don't tell me the answer, only how to solve it. Thanks :D
January 15, 2015 by Me
Use the following reactions to arrange the elements A, B, C, and D in order of their redox activity, from greatest to least. 2 A + B2+ --> 2 A+ + B B + D2+--> B2+ + D A+ + C -->No reaction 2 C + B2+ --> 2 C+ + B Can someone explain? thanks
May 8, 2011 by Rebekah
Please Solve: 4-x=-5 I thought the answer was -9 but that doesn't seem to be it. Can someone please help? Thanks! This is what I have: 6. 4-x=-5 The problem to solve is: 4-x=-5 Subtract 4 from both sides x = -9 Then divie by -1 Would the answer be 9? To Check: 4- - 9 = -5
June 27, 2009 by Angie