Monday
May 20, 2013

# Search: math formula?

Number of results: 195,273

Chemistry
the formula H2O2 is an example of 1.molecular formula 2. an empirical formula 3.an ionic formula 4.an organic formula
Sunday, November 28, 2010 at 10:24pm by tia

Chemistry
If the formula you wrote is correct, yes. How do I know. Because there is only 1 O atom. For the molecular formula and empirical formula to be different, the molecular formula must be a multiple of the empirical formula. And for that to happen, the molecular formula must be ...
Tuesday, March 9, 2010 at 3:11pm by DrBob222

math 213
The effect of depreciation can be computed using a formula similar to the formula for compound interest. a. Assume depreciation is the same each month. Write a problem involving depreciation and solve it. b. Develop a general formula for depreciation defining what each ...
Monday, April 19, 2010 at 6:29pm by billy bob

math
Are you sure your formula is not just |A+B+C|/sqrt(A^2+B^2) ? It does not make sense to find the (2,-2) point and then go to the trouble of using your formula. I have never seen (or needed) this formula.
Wednesday, October 22, 2008 at 9:08pm by Damon

algebra
how would i work out the following problems solve each formula in terms of the given variable 1. 5d-2g=9 ;g The formula A=2h(l+w) gives the lateral area a of a rectangular solids with length l, width,w and height h. 2. solve this formula for h 3. solve this formula for l The ...
Monday, September 22, 2008 at 6:15am by jessica

chemistry
The simplest formula. For example, C2H6 is the molecular formula for ethane but thre empirical formula is CH3. CH2O is the empirical formula but the molecular formula could be C6H12O6.
Monday, September 5, 2011 at 11:50pm by DrBob222

math
Since this is a math question, I am surprised they did not tell you the formula to use. This is really a question about physics. They may be expecting you to use a formula with a different value of g. The formula I gave you neglects air resistance, which would lengthen the ...
Wednesday, March 19, 2008 at 2:24pm by drwls

MATH
Never mind worrying about the formula h = - g (d/Vxo)^2 + Vyo*(d/Vxo). I was just trying to derive the correct formula using physics, since the formula you provided was wrong.
Sunday, July 13, 2008 at 2:23pm by drwls

Math
Mathematicians have been searching for a formula that yields prime numbers. One such formula was x2 - x+41. Select some numbers for x, substitute them in the formula,and see if prime numbers occur. Try to find a number for x that when substituted in the formula yields a ...
Friday, December 17, 2010 at 1:13pm by Jean

chemistry
The empirical formula is the simplest whole number formula that can be written while the molecular formula is the whole number formula for the molecule. For example, the empirical formula for glucose is CH2O while the molecular formula is C6H12O6. Note that the molecular ...
Thursday, September 30, 2010 at 11:37am by DrBob222

chemistry
I must tell you I get confused every time someone starts talking formula units and formula weights (mass). I think formula unit x formula mass = mass in grams.
Thursday, December 2, 2010 at 9:02pm by DrBob222

Pre-Algebra
Please help to solve to find x,y 1. y=7x-3 2. 4x+2y=8 Take the value of y in the first formula and substitute it for y in the second formula. Solve the second formula for x. Once x is found, solve for y in the second formula. Check by inserting both values into the first ...
Friday, May 18, 2007 at 10:40am by Lee

AP Chemistry
The empirical formula is the simplest formula, but first you need the molecular formula by colelcting the same elements together. CH3CO2H molecular formula is C2H4O2 simplest is then CH2O
Monday, September 26, 2011 at 4:15am by Dr Russ

chemistry
Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?
Tuesday, March 24, 2009 at 6:58pm by chrissy

chemistry
Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?
Tuesday, March 24, 2009 at 5:34pm by jaz

Chemistry
Yes, no, yes. The EMPIRICAL formula for a compound with the ratio of C2H6 is CH3. The empirical formula is the simplest formula that can be derived. The C2H6 COULD BE (but it isn't necessarily so) the molecular formula.
Saturday, December 4, 2010 at 9:01pm by DrBob222

Math
invested 2000 gains 0.2 every odd numbered month final value after first month? i've tried solving this with a formula, but every formula i come up with is wrong. Could someone tell me how to solve this and plug in the right numbers into a formula?
Monday, September 5, 2011 at 3:51am by Amy

Math
notice that the formula I gave is just a variation of the Cosine Law formula.
Monday, March 7, 2011 at 1:53pm by Reiny

math formula
Find the volume of the prism. whats the formula i would use?
Monday, March 7, 2011 at 11:31am by danny

math (Gaussian n! formula)
I dont know where you got that formula, it is obviously wrong. 2!=2*1 which does not equal 2*3/2
Saturday, October 2, 2010 at 7:23pm by bobpursley

math
The formula T = 1/f relates the period of a sound wave T to its frequency f. Solve this formula for f.
Sunday, December 13, 2009 at 8:19pm by mia

Math
i know the formuula for density is d=m/v. is the formula for mass then m=dv? what about the formula for volume? is that v=m/d?
Sunday, February 15, 2009 at 8:17pm by Lonzy

AP Chemistry
The structural formula for acetic acid is CH3CO2H. What is its empirical formula; what is its molecular formula?
Monday, September 26, 2011 at 4:15am by Ceasar

I have a review question that says: The formula for the circumference of a circle is C = pi x d, where d represents the circle's diameter. Which statementis correct? Would it be D? Wasn't sure if a diameter could have a decimal or fraction. A. the formula only works if...
Tuesday, March 27, 2012 at 5:05pm by Brandi

math-story question
That's really not a "story" problem. They tell you a formula to start with. Also, you have written the formula incorrectly Actually, r = sqrt[3V/(pi*h)] You replaced a "pi" symbol with an r. Square both sides and multiply by (pi*h/3) to get a formula ...
Saturday, September 22, 2007 at 5:32pm by drwls

chemistry
If a compound's empirical formula is CH2O and its' formula mass is 120.12 amu, what is its' molecular formula
Sunday, December 13, 2009 at 12:46pm by nick

chemistry
why is the formula written for an ionic compound such as NaCl the empirical formula,rather than a molecular formula?
Sunday, April 27, 2008 at 3:20pm by caleb

chemistry
why is the formula written for an ionic compound such as NaCl the empirtcal formula ,rather than a molecular formula?
Sunday, April 27, 2008 at 3:04pm by caleb

math
Write a formula for the height of a trapeziod based on the formula for it area A= 1/2(base1 + base2)h
Wednesday, April 13, 2011 at 9:23pm by brittany

Math
What's the formula for this (x+a)^n were x is a variable a is a constant and n is some power that can change example (x+5)^2 (x+5)^3 (x+5)^4 what's the general formula?
Thursday, May 20, 2010 at 9:55pm by Susan

math
It would be more of a drop. But i still done get the formula. did i do the formula right in the first place?
Sunday, March 28, 2010 at 10:30pm by Dylan

Chemistry+empirical formula
I didn't check your math but if it's correct, round the 2.1 to 2.0 and the formula is Mg1Br2.0 or MgBr2.
Thursday, January 15, 2009 at 11:03pm by DrBob222

math
&gt; Do you think that the formula where n is ... Can you post the formula so that we can help you?
Wednesday, June 24, 2009 at 2:15am by MathMate

AP chem
You are getting ahead of yourself. What is the formula mass of the empirical formula. And what is the molecular formula. (Or tell me what you don't understand). So what is D.
Wednesday, November 7, 2007 at 8:19pm by DrBob222

math
the formula K = C + 273 is used to covert temperatures from degrees Celcisu to Kelvin. Solve this formula for C.
Sunday, December 13, 2009 at 8:07pm by mia

i need help..algebra/math
x^2 + x - 2 = 0 a = 1, b = 1, c = -2 are the variables. The formula is "the opposite of b plus or minus the square root of b squared minus 4ac all over 2a." If you click "Mathematics" on the right, a tutorial on the quadratic formula is available. Go to &...
Friday, November 16, 2007 at 9:31pm by Michael

chemistry
Too many questions to one post. Too many questions with no work shown. 1. molar mass and empirical formula atomic ratio molecular formula is the same as the empirical (but you didn't finish the sentence) formula or a multiple of the empirical formula.
Tuesday, March 24, 2009 at 11:42pm by DrBob222

math
Einsteins famous formula E=mc^2 relates energy E,mass m and the speed of light c. solve the formula for c.
Saturday, March 9, 2013 at 2:25pm by lisa

math
g is a linear function such that g(1)=7.5 and g(7)=12.6 Find the formula for g(x). I've tried doing it and the formula i got was: y = 0.9x + 6.6 is that correct?
Monday, March 29, 2010 at 10:15pm by Luke

math
So anytime it is asking for a z score this is the formula to use? What if it was not normal distribution? Is their another formula? Thank you for your help. I wish my instructor explained it that easy!
Sunday, August 23, 2009 at 11:45am by sam

math
how do you graph a linear equasion I BELIEVE ITS Y=MX+B FORMULA AND THE SLOPE FORMULA what? please explain
Sunday, October 22, 2006 at 8:52pm by Nikki-Ole

math
given the formula D=ABC, what is the formula for C?
Thursday, June 21, 2012 at 9:42am by tia

Chemistry
Isn't the molar mass 92.09 g/mol? This is what i got with /\T=Kf*m formula. If that's the case then C3H8O3 is the empirical formula and the molecular formula. Correct?
Sunday, December 9, 2012 at 4:07pm by Brian

math
The formula for the volume of a cone is V = (1/3)*pi*R^2*H In this case, invert the formula and solve for H, the height. You should do your own calculations.
Friday, August 27, 2010 at 9:42pm by drwls

Assume a value of b and calculate the corresponding c with the formula given, or vice versa. Your formula can be simpliied to: b + c = 1 c = 1 - b
Wednesday, September 30, 2009 at 9:36pm by drwls

ALGEBRA
I have two problems that I am not sure about how to work out. 1. The distance traveled by a falling object is given by the formula d=4.9t^2, where d is in meters and t is in seconds. Solve the formula for t. 2.The volume of a right circular cone is given by the formula V=1/3(...
Monday, March 31, 2008 at 8:44pm by Casey

Algebra
I have two problems that I am not sure about how to work out. 1. The distance traveled by a falling object is given by the formula d=4.9t^2, where d is in meters and t is in seconds. Solve the formula for t. 2.The volume of a right circular cone is given by the formula V=1/3(...
Monday, March 31, 2008 at 8:24pm by FCH

chemistry
why is the molecular formula of oide of arsenic in its gaseous state is not neccessarialy the same as its empirical formula what does this mean and how do i do it Molecules are known to dimerize or trimerize. We actually don't know what the molecular formula is until we ...
Tuesday, January 30, 2007 at 4:14pm by donald

science
we did an experiment. and the grass formula is: Given: (what we already know) Required: (wha we need to know) Aanalysis: (how we figure it out, the formula ex. d = m x v) Solution: ( do the formula) statement: ( therefore...)
Tuesday, September 29, 2009 at 4:36pm by becca

chem
could anyone tell me why the molecular formula of agas is not always the same as the empirical formula tnx It may be a dimer or a trimer. For example, CH is the empirical formula for acetylene but the molecular formula is HC(triple bond)CH or C2H2.
Saturday, February 3, 2007 at 3:28pm by bex

Math
what's the problem? You have the formula and the numbers. Plug and chug. The only hard part is picking the proper formula. We'll be happy to check what you get.
Sunday, July 15, 2012 at 10:28am by Steve

math
not much data to use, so it should be easy. Hmmm they give you "a" and a formula for B How hard is it to plug a into the formula? B = 31*2100
Sunday, April 1, 2012 at 6:28pm by Steve

math
In the formula s=ut+1/2at square.Make a the subject of formula (b)find the values ot t when s=42,u=2 and a=8.Am getting difficulties in that number.
Wednesday, June 20, 2007 at 8:00am by katrina

Chemistry (Check)
True or False The empirical formula of a compound is always the same as the molecular compound. My Answear: True The empirical formula for acetylene is CH. The molecular formula is C2H2. Another example: The empirical formula for glucose is CH2O. The molecular formula is ...
Sunday, February 4, 2007 at 12:36pm by Bryan

Chemistry
I assume you know how to find the empirical formula since you obtained the right answer for C5H10O. The molecular formula is 86.13/empirical formula mass = x where is is the multiplier to be used on the empirical formula. Just suppose the empirical formula mass is 42. Then 86....
Friday, January 20, 2012 at 10:14pm by DrBob222

Math
The formula for the area of a circle is A = pi * r^2 Which of your choices shows the formula for the areas of three identical circles? I'll be glad to check your answer.
Wednesday, March 30, 2011 at 9:44pm by Ms. Sue

i need help..algebra/math
solve by using the quadratic formula: x2 plus x minus 2 equal 0 I know the formula is a=1 b=1 c=2 I'm having trouble solving...please help.
Friday, November 16, 2007 at 9:31pm by kate

Math
Use the quadratic formula to solve each of the following quadratic equations... 1. 2x^2-5x=3 2. 3x^2-2x+1=0 Rearrange the equation in quadratic formula form. 2x^2 -5x -3 = 0 Then use the formula. Tell me what you don't understand about it if you don't know what to do ...
Wednesday, June 13, 2007 at 3:43pm by Tomika

math
The distance d in Km to the gorizon can be estomated using the formula d= rootover13h, where h is the height above ground level, in meters of the observer. a)use the formula to find the distance to the horizon for an observer on the london eye, 135m above ground. b)rearrange ...
Thursday, June 10, 2010 at 9:23am by Kheladi Nep

Chemistry
empirical formula mass = 3C+5H+2O = 3*12+5*1+2*16 = 36+5+32= 73. So 145.14/73 = 1.988. Round this to an even number (in this case 2.0) and the molecular formula is (C3H5O2)2 or C6H10O4. That is, the molecular formula is two units of the empirical formula.
Monday, March 29, 2010 at 8:02pm by DrBob222

Chemistry re-post URGENT
Your formula of C18H26O3N is correct. The last part is done with the Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? The catch is in the statement. If each molecule contains one atoms of N, then the empirical formula must be the same as...
Monday, October 22, 2007 at 7:44pm by DrBob222

Chemistry
Please check my answers for the following questions. THANK YOU. 1) The empirical formula of a compound that is 25.9% nitrogen and 74.1% oxygen is.... ANSWER: N2O 2) empirical formula of a compound that consists of 4.80 grams of carbon, 1.20 grams of hydrogen, and 2.80 grams of...
Thursday, August 2, 2007 at 3:17am by anonymous

chem
And you want to know what? The formula? empirical formula? molecular formula? Take a 100 g sample which will give you 25.0 g C 2.1 g H 39.6 g F 33.3 g O Now convert each to moles, then find the molar ratios of the elements to each other with the smallest being 1.00. The easy ...
Monday, December 13, 2010 at 1:24pm by DrBob222

Math (Calc)
Find the Exact value of Pi/24. I'm not sure whether to use a half-angle formula or a difference/sum of angles formula.
Sunday, December 9, 2007 at 5:31pm by Bryan

Algebra 2
The simple formula for the nth term of an arithmetic sequence is an = 4n + 16. What is the explicit formula corresponding to the simple formula?
Thursday, April 4, 2013 at 6:53pm by Tifini

Algebra
The simple formula for the nth term of an arithmetic sequence is an = 4n + 16. What is the explicit formula corresponding to the simple formula?
Thursday, April 4, 2013 at 6:37pm by Help Please!

Chem 22
balance molecular formula, total ionic formula and net ionic formula of Sr(NO3)2 + Al2(SO4)3. Thank you
Thursday, December 2, 2010 at 6:59pm by Ivy

Chem 22
balance molecular formula, total ionic formula and net ionic formula of Sr(NO3)2 + Al2(SO4)3. Thank you
Thursday, December 2, 2010 at 6:57pm by Ivy

math
Use the distance formula for finding points on the xy-plane. Let d = distance. d = sqrt{(x2 - x1)^2 + (y2 - y1)^2} You must apply the above formula to find the distance between points A and B, B and C and A and C. So, you must apply the distance formula 3 times. Got it? If not...
Sunday, February 10, 2008 at 11:41am by Guido

AP chem
Now what is the formula mas of the empirical formula you worked out? So now you know the molecular formula is ??
Wednesday, November 7, 2007 at 8:19pm by DrBob222

Physics
Here, I am dealing with a Science formula for momentum. The formula is: M= mv So, I have: m= 10 grams (.01 Kilograms) v= 5,000 centimeters a second (50 m/s) It says to Find M and also solve the formula for M. Please help!
Tuesday, June 8, 2010 at 5:45pm by Amal

Physics
Here, I am dealing with a Science formula for momentum. The formula is: M= mv So, I have: m= 10 grams (.01 Kilograms) v= 5,000 centimeters a second (50 m/s) It says to Find M and also solve the formula for M. Please help!
Tuesday, June 8, 2010 at 3:14pm by Amal

Math
First, solve the y=x=-6 formula into the slope intercept formula: y = -x-6. Now, the point on the graph will be (0,-6) and the slope will be -1.
Thursday, December 2, 2010 at 12:52pm by Amy

math
when you are determining a formula for cot(2x) using only tan(x) would the formula be...(1-tan^2(x))/(2tan(x))?
Sunday, April 19, 2009 at 5:31am by kim

algebra
I am unfamiliar with the meaning of the "#" symbol in this math formula. Please repost with the symbol explained or the formula changed. Thanks for asking.
Sunday, January 11, 2009 at 10:06pm by PsyDAG

invested 2000 gains 0.2 every odd numbered month gains 0.15 every even numbered month write function for n months? i've tried solving this with a formula, but every formula i come up with is wrong. Could someone tell me how to solve this and plug in the right numbers into...
Monday, September 5, 2011 at 9:15pm by Amy

math
to convert from F to C we use this formula. (c)=(f-32)*5/9 using this formula,convert 85 F to celsius rounded to the tenth place
Thursday, January 31, 2008 at 1:48pm by paris

math-calculus
solve equation |x^2-2x-6| using quadratic formula. i not get how to do this and it says quadratic formula.
Wednesday, January 18, 2012 at 9:40pm by Shreya

Math
The formula for the volume of a sphere is V=4 out of 3 pi r^3. How is this formula written if the radius,r,is a function of the volume,V?
Monday, October 4, 2010 at 4:28pm by Sherri

chemistry
Convert 14.54 mg CO2 to mols C. 0.01454/44.01 = ? Convert 3.97 g H2O to mols H. 0.00397*2/18.015 = ? Find the whole number ratio for C and H and that will be the empirical formula. For molecular formula, (272/(mass empirical formula) = x round x to a whole number and molecular...
Thursday, September 27, 2012 at 9:40pm by DrBob222

math
tropical pools sells an above ground model for p dollars each the monthly revenue for this model is given by the formula R(p)=-0.08p^2+300p revenue is the product of the price p and the demand(quanity sold) a.) factor out the price on the right hand side of the formula b.) ...
Thursday, August 5, 2010 at 11:43pm by thomas

math
What is the result when correctly solving the formula for the variable w when the formula for the perimeter P of a rectangle is P=2l + 2w? Is it w = (p-2l)/2 If not, please explain. Thanks
Friday, May 10, 2013 at 10:40am by Jane

math
Use the binomial distribution. If you calculate by hand, here is a formula: P(x) = (nCx)(p^x)[q^(n-x)] x = 0 n = 2 p = .5 q = 1 - p = .5 Substitute into the formula and calculate. I hope this will help.
Thursday, November 1, 2012 at 8:29pm by MathGuru

math
Formula for area of table minus formula for area of square. Do you know those two formulas? If not, look in your textbook or Google them.
Wednesday, January 25, 2012 at 6:19pm by PsyDAG

math help plz
i dont know how to solve it but i have the quadratic formula but i dont know is it the same when the 0= is in the begining and 0= is at the end. i can use that formula?because i get confused
Monday, May 25, 2009 at 12:19pm by puppy101

the derivative of 2x^e is zero right or no? do i have to use the log formula 2 x^e is x to the power 2.718.. It is not a constant and therefore the derivative is not zero. Use the formula for the derivative of x to a power that is constant (x^a). The formula for that may ...
Sunday, September 24, 2006 at 10:26pm by Anonymous

chem
balance the formula Cu(OH)2(s) + HNO3(aq) -&gt; H2O(l) + fine the formula here(aq) i did the H20 but i don't know the other formula i thought it was CuNO3 but thats wrong and idk what to do with the extra O
Saturday, November 27, 2010 at 8:24pm by hannah

it actually say to use quadratic formula so i subtract 4 from both sides to get an equation by itself so i plug it in?
Tuesday, January 17, 2012 at 11:49pm by Shreya

Math
* By equation, I meant quadratic formula. Sorry for being vague. ** As well, I typed the quadratic formula wrong. It's: x = [-b (+ or -) [sqroot](b^2 -4ac)] / [2a]
Thursday, June 10, 2010 at 4:28pm by Anonymous

Math
What is a quadratic formula? how can i solve x^2 + 8x + 12 = 0 applying quadratic formula?
Wednesday, January 18, 2012 at 10:34am by Justin P

Math
Measurements: Length = 5 cm Width = 18 cm Height = 26 cm ____________________________________________ Calculate the surface area of the prism. Formula: Calculate the volume of the prism Formula: Calculate the volume of the prism as if it were a pyramid. Formula: P.S. I have ...
Monday, February 25, 2013 at 2:19pm by Jman

math
to use the formula, you must have ax^2 + bx + c = 0 so, convert to that format, by clearing fractions and collecting terms: 1/2 x^2 = x/4 + 1 2x^2 = x + 4 2x^2 - x - 4 = 0 no apply the formula
Monday, January 28, 2013 at 4:21pm by Steve

Chemistry re-post URGENT
Well i found the moles of each element. Carbon has 5.91mol Hydrogen has 8.51mol Oxygen has 0.988mol Nitrogen has 0.328mol Then I put the moles as subscripts and divded each subscript by the lowest amount of moles (nitrogen with 0.328mol). Then as the empirical formula I get ...
Monday, October 22, 2007 at 7:44pm by Marty

Pre-algebra
Transform the formula. The area of a triangle A can be found with the formula A=1/2bh where b is the length of the base of the triangle and h is the height of the triangle. Solve the formula for h.
Thursday, January 20, 2011 at 9:30pm by Jacob

math-story question
For a cone, the formula r = 3V divided by rh( all enclosed in square root symbol) describes the relationship between the radius r of the base, the volume V, and the height h. Solve the formula for V.
Saturday, September 22, 2007 at 5:32pm by melissa

Math Algebra
Use the quadratic formula to solve for the variable, p. I would use google or another search engine to find the formula so you can plug all the numbers in correctly.
Tuesday, March 11, 2008 at 11:06pm by Lauren

math(trig)
i need to figure out how to write the formula for the following question In a right triangle a = 30 yds and t5an A = 2. Find b and c. I have the answers but do not know how to write the formula. Can you help me ?
Tuesday, December 18, 2007 at 10:22pm by freddie

math
From the information above: x - y = 133 x + y = 147 Find the value for x in one formula. x = y + 133 Substitute that for x in the second formula and solve for y. (y + 133) + y = 147 2y = 147 - 133 = 14 y = 7 Put the y value into the first formula and solve for x. x = y + 133...
Thursday, March 5, 2009 at 4:37pm by PsyDAG

Math (PreAlgebra) 8thG
Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. V = (4/3)3.14(r)^3 = (formula) I don't know what to do about the fraction, four over three (4/3), in the formula.... Show me how to do this please?
Monday, February 18, 2013 at 2:01pm by LovelyDec0y

Math
Do what I said. Use the quadratic formula or completing the square. You can search the net for many math sites that easily teach you about the quadratic formula and/or completing the square.
Tuesday, February 19, 2008 at 7:32pm by Guido

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