Friday

April 18, 2014

April 18, 2014

Number of results: 21,998

**acid and base titrations**

Write the equation and balance it. Convert NaOH to moles. moles = M x L. Using the coefficients in the balanced equation, convert moles NaOH to moles H2SO4. Now convert moles H2SO4 to M from M = moles/L
*Friday, November 19, 2010 at 8:09pm by DrBob222*

**math**

is this right Write the numeral in base ten 25eight 25(8)=14(10)
*Monday, July 20, 2009 at 12:36am by chandice*

**Math**

Draw Base Ten Blocks to show the number five hundred fifteen.
*Wednesday, October 19, 2011 at 6:31pm by Sam*

**chemistry**

pH = pKa + log(base)/(acid) Substitute and solve for b/a Then b + a 0.35. Solve the two equations simultaneously to obtain concns in molarity for base and acid. Then convert to grams for 500 mL of each.
*Monday, September 12, 2011 at 7:42pm by DrBob222*

**business math**

If Naomi decides that she will invest $3,000 per year in a 6% annuity for the first ten years, $6,000 for the next ten years, and $9,000 for the next ten years, how much will she accumulate? Treat each ten year period as a separate annuity. After ten years of an annuity, then ...
*Monday, April 5, 2010 at 9:19pm by Heather*

**Chemistry**

...........Al(OH)3 ==> Al^3+ + 3OH^- I.........solid.........0.......0 C.........solid.........x.......3x E.........solid.........x.......3x Substitute the E line into the Ksp expression for Al(OH)3 and solve for x = (Al^3+). Convert that to OH^-, change to H^+ and convert ...
*Tuesday, March 25, 2014 at 12:37am by DrBob222*

**Physics**

PLEASE HELP, I'm trying to study for a quiz >.< and I don't understand this one question! A fellow student reports his measurements of time for a speed calculation in minutes. How could he express that calculation using SI base units? A)convert minutes to hours and redo...
*Wednesday, October 17, 2012 at 6:30am by Abby*

**math**

What are Base Ten Blocks? Since this is not my area of expertise, I searched Google under the key words "base ten blocks" to get these possible sources: http://www.susancanthony.com/Resources/base10ideas.html http://www.learningbox.com/base10/ From what I can gather, they are ...
*Thursday, February 8, 2007 at 12:15pm by Miranda*

**Math-Geometry**

if we want the answer in ft^3, then let's convert the base to ft. I assume that's the radius of the base. v = 1/3 pi r^2 h = 1/3 pi (1/6)^2 * 2.1 = 0.061 ft^3 Looks like (A)
*Tuesday, February 12, 2013 at 2:15pm by Steve*

**chemistry**

The stoichiometry point is when moles acid = moles base. moles base = M x L = ? moles acid = moles base moles acid = M x L. You know moles and M, solve for L and convert to mL.
*Saturday, December 3, 2011 at 4:02pm by DrBob222*

**CHEMISTRY**

Use the Henderson-Hasselbalch equation. pH = pKa + log (base)/(acid) You have pH, pKa, and (acid); solve for (base) and convert to grams in 500 cc.
*Tuesday, February 12, 2013 at 2:36pm by DrBob222*

**Precalc**

1. 1/3log base 8 of (x+1)=2log base 8 of 3-(2/3)log base 8 of (x+1) 2. 2^x+8 times 2^=x all over 2 = 3 3. if log base a of 3= x and log base a of 2 = y, find each of thefollowing in terms of x and y log base a (18a^3) thanks!!
*Wednesday, November 28, 2012 at 4:30pm by Rebekah*

**Algebra 2**

-Explain the difference between log base b (mn) and ( log base b of m)(log base b of n). Are they equivalent? My answer: Let b=2, m=8, n=16 *log base b (mn)=log base b of m + log base b of n log base 2 of 8+ log base 2 of 16=7 * (log base b of m) (log base b of n)=(log base 2 ...
*Sunday, July 21, 2013 at 5:58pm by Anonymous*

**arithmetic**

Write the numeral in base ten. 42five. I think the answer is 42 because it contains 4 tens an 2 ones. Is that right?
*Monday, November 16, 2009 at 10:05pm by Anonymous*

**math**

convert from decimal to the indicated base. 56 to base 5. i know theres long division involved but i have no idea what to do after. i did 5\56 & got 11 then 5/11 & got 2 & then 5/2 to finally get a remainder of 0 what do i do now!?
*Saturday, September 28, 2013 at 6:59pm by lisa*

**AP Chemistry**

moles acid or base = M x L = ?? Next use the coefficients in the balanced equation to convert moles acid/base to the other one. The M = moles/L. Here is an example using (a). HCl + NaOH ==> NaCl + HOH moles HCl = M x L = 0.500M x 0.021L = 0.0105. moles NaOH = 0.0105 x (1 ...
*Saturday, September 24, 2011 at 9:11pm by DrBob222*

**chemistry**

(1)acid+base=.1M potassium dibasic phosphate: 7=12.67 + log(base/acid) (base/acid)=2.138x10^-6 subst. in (1) base+base/2.138x10^-6=.1 solving base=2.13x10^-7M Mass of base=2.13x10^-7 x (174.18g)=3.71x10^-5g Now I can find the mass of the acid as well by substituting for the ...
*Sunday, November 14, 2010 at 12:36am by dave*

**College Math 213**

1011two to base ten = 1(2^3) + 0(2^2) + 1(2) + 1 = 11 1574 to base twelve powers of 12: 12, 144, 1728 , ... 1574/144 = 10 with remainder of 134 134/12 = 11 with remainder of 2 so 1574 = 10(12)^2 + 11(12) + 2 = AB2 in base 12
*Sunday, December 6, 2009 at 8:21pm by Reiny*

**Math**

Lets say it started at 100. In ten years, it was 110. In another ten years, it was 121. Now deduct ten percent, or 121-12.1
*Monday, July 6, 2009 at 3:04pm by bobpursley*

**Math Algebra 2**

In my Ti83 you have your choice of log key which is log base ten and ln key which is log base e 1. log (4 M N) = log 4 + log M + log N or perhaps you mean log (MN)^4 which is 4 (log M + log N) 2. do you mean M^2 N ???? (1/3)(2 log M + log N) 3. (1/7) (log M - log N) These are ...
*Tuesday, February 5, 2013 at 10:57am by Damon*

**Math Algebra 2**

In my Ti83 you have your choice of log key which is log base ten and ln key which is log base e 1. log (4 M N) = log 4 + log M + log N or perhaps you mean log (MN)^4 which is 4 (log M + log N) 2. do you mean M^2 N ???? (1/3)(2 log M + log N) 3. (1/7) (log M - log N) These are ...
*Tuesday, February 5, 2013 at 10:57am by Damon*

**Organic Chem**

Potassium tert-butoxide is a common base for E2 reactions because it is _______. A. weak base B. an organic base C. a strong base D. a bulky base
*Friday, March 6, 2009 at 5:09am by nilee*

**Math**

A) 56,080 B) 54,290 C) 4828 D) 3585 Those are the possible choices. I don't understand how to find base ten?
*Monday, October 19, 2009 at 2:43pm by Kelly*

**Math**

Change the numbers to base ten. Select the correct answer. 973 twelve 1,383 1,152 1,371 1,191
*Friday, May 25, 2012 at 10:08pm by keke*

**Math**

log3 (4^3) = 3 log3 (4) the real problem is to find log base 3 of 4 Let x = log3(4) then 3^x = 4 we can take base ten logs of both sides with our calculators x log 10 (3) = log 10 (4) x = log 10 (4) / log 10 (3) x = .60206 / .47712 x = log3 (4) = 1.262 we want 3 x = 3.786
*Thursday, January 31, 2008 at 9:39pm by Damon*

**Chemistry**

You must know where the equivalence point is in order to know where you are on the titration curve. mL acid x M acid = mL base x M base. 25*0.434 = mL x 0.365 mL base = estimated 30 mL so 15 mL is BEFORE the eq point and 40 mL is AFTER the eq point. A. mols HI = M x L = ? mols...
*Monday, June 3, 2013 at 10:03pm by DrBob222*

**Math**

triangle base = 6 , height = 8 3 4 5 right triangle 6 8 10 so ten
*Sunday, November 28, 2010 at 2:59pm by Damon*

**Chemistry**

The Henderson-Hasselbalch equation is pH = pKa + log(base)/(acid) Remember to change Kb to pKa. pKa + pKb = pKw = 14 If you convert Kb to pKb you can use the above to convert that to pKa.
*Monday, April 29, 2013 at 3:35am by DrBob222*

**math**

you must convert it: Base 10: 5+5(6) + 5 (6^2)
*Sunday, October 4, 2009 at 12:28pm by bobpursley*

**Math**

7001 in base ten is: 1x(8^0)+0x(8^1)+0x(8^2)+7x(8^3)=1+7x512=1+3584=3585
*Wednesday, October 21, 2009 at 1:02pm by Marinho*

**English**

1. The dog is black and white. 2. The dog is blown. 3. One is a black and white dog and the other is a blown dog. 4. It's ten to twelve. 5. It's ten before twelve. 6. It's ten past twelve. 7. It's ten after five. (Are the sentences all grammatical? Have a great day!)
*Tuesday, September 13, 2011 at 9:25pm by rfvv*

**Math**

Write the numeral in base ten. 130five A) 40 B) 60 C) 640 D) 650 I got A)40
*Sunday, March 14, 2010 at 6:42pm by Tyga*

**math**

Use base ten blocks and a grid to represent each fraction.Then write each fraction as a decimal. A)1/2 B)9/10
*Tuesday, January 18, 2011 at 7:58pm by pearl*

**chemistry**

Write the equation. NaH2PO4 + NaOH ==> Na2HPO4 + H2O Convert 10 g NaH2PO4 to moles. Convert 150 mL of 0.2 M NaOH to moles. React and calculate the concn of H2PO4 and HPO4 in the 2.0 L container. Then pH = pKa + log[(base)/(acid)] Post your work if you get stuck.
*Wednesday, October 7, 2009 at 8:55pm by DrBob222*

**maths (mensuration)**

Area = (1/2)*base*(base/2)*sqrt3 = (sqrt3)(base)^2/4 = 50 base^2 = 200/sqrt3 = 115.47 base = 10.7456599 All sides have that length, since the triangle is equilateral.
*Wednesday, May 4, 2011 at 6:48am by drwls*

**physics**

for a science project about ten forms of energy,how do you convert or change one energy to another. can you give me an example please?
*Sunday, December 19, 2010 at 8:02am by math1*

**Chemistry**

If you add 0.35grams NaF to 150mL of a 0.30M HF, what is the pH of the resulting solution? To start off would I use the value of 1.4e-11 for F^-^ and 7.2e-4 for HF? Chemistry(Please help) - DrBob222, Tuesday, April 10, 2012 at 12:04am This is a buffer problem. pH = pKa + log(...
*Tuesday, April 10, 2012 at 12:51pm by Hannah*

**math**

Convert 3214 (5) to base 10
*Tuesday, November 29, 2011 at 8:51pm by mary lou*

**math**

Can someone please double check my answers (My answers are in Capital) 1. If you produce a million products a day and you want to test ten of them to determine if they are up to standard, which ones will you choose? a. The second ten B. TEN RANDOM UNITS c. The last ten d. The ...
*Monday, June 17, 2013 at 6:27pm by mysterychicken*

**arithmetic**

find the value of each group of base ten blocks = 100 block = 10 small block = 1 how do you figure this out?
*Wednesday, August 22, 2012 at 11:05pm by thomas*

**Chemistry**

A base has a Kb of 2.5 x 10–11. Which of the following statements is true? This is a concentrated base. This base ionizes slightly in aqueous solution. This is a strong base. An aqueous solution of this base would be acidic.
*Friday, March 9, 2012 at 4:48pm by Rachel*

**Chemistry**

A base has a Kb of 2.5 x 10–11. Which of the following statements is true? A.This is a concentrated base. B.This base ionizes slightly in aqueous solution. C.This is a strong base. D.An aqueous solution of this base would be acidic. My answer is D...?
*Tuesday, February 12, 2013 at 11:04am by Cassie*

**math**

i am a number greater than 70000 but less than 90000. My ten digit is the same as my ones digit. My ten digit is the same as my ones digit. My ten thousand digit is four times my ones digits. Both my hundreds and thousands are half the ten thousand digit. what number am I?
*Thursday, June 20, 2013 at 9:45pm by ramil*

**math**

log(base 4) 4^6 = x convert to exponents 4^x = 4^6 so x =6 which means the expression = 6
*Tuesday, February 19, 2013 at 7:55pm by JJ*

**Chem**

pH = pKa + log(base)/(acid) You have Kb, convert that to pKb, then to pKa by pKa + pKb = pKw = 14. (CH3NH3B) is the acid. pH = 10.0 (base) = 0.49M Solve for (CH3NH3Br)
*Wednesday, May 1, 2013 at 9:59pm by DrBob222*

**algerbra**

10^7 * 10^3 ------------- 10^4 *10^-9 to multiply, add exponents if the base is the same. Of course that means to divide, subtract exponents. Since the base for all of these is ten, all we have to do is add and subtract. 7 + 3 - 4 - -9 of course - - is + 7 + 3 - 4 + 9 = 15 so ...
*Wednesday, February 20, 2008 at 1:27pm by Damon*

**math**

billions, hundred millions, ten millions, millions, hundred thousands, ten thousands, thousands, hundreds, tens, ones Those are the places of every digit of that number. The digit/numeral in the ten thousands place is the 6. See what I wrote above? The ten thousands place is ...
*Thursday, September 9, 2010 at 4:27pm by Jen*

**Math**

It depends on the number base. In base 3, it is 11 in base 4, it is 10 in base 5, it is 4
*Thursday, October 18, 2012 at 7:50pm by bobpursley*

**math**

Draw a picture of base-ten blocks and use the area interpretation for multiplication to show 34 X 28 complete the calculation by using a paper-and-pencil algorithm
*Monday, June 15, 2009 at 4:28pm by heatherly*

**chemistry**

Let's call quinine, BN .........BN + HOH ==> BNH^+ + OH^- initial.0.39M.........0........0 change...-x...........x.........x equil...0.39-x........x........x Kb = (BNH^+)(OH^-)/(BN) You have pKa of the conjugate acid, convert to pKb for the base, substitute into the Kb ...
*Tuesday, April 24, 2012 at 9:18pm by DrBob222*

**Finance**

You are considering two lottery payment options: Option A pays $10,000 today and Option B pays $20,000 at the end of ten years. Assume youc an earn 6 percent on your savings. Which option will you choose if you base your decision on present values? Which option will you choose...
*Wednesday, April 24, 2013 at 11:51am by Julia Coon*

**1 chem question**

A base has a Kb of 2.5 x 10–11. Which of the following statements is true? This is a concentrated base. This base ionizes slightly in aqueous solution. This is a strong base. An aqueous solution of this base would be acidic. (do explain. i dont understand this one)
*Tuesday, February 14, 2012 at 10:41am by Sara*

**MATH**

HASAN MADE A MODEL FOR 437 HUNDREDS, 3 TENS,AND 7.WHAT ARE TWO OTHER WAYS HE COULD SHOW 437 USING BASE-TEN BLOCKS?
*Thursday, September 15, 2011 at 4:28pm by CHARLES*

**discrete math**

The best way to do these is to resist the temptation to convert them to base 10 and carry out the calculation in base 10. You can always check the answer this way. Set the calculation up as you would with a base 10 calculation so for the first one aface _fad2 _______ Now ...
*Friday, November 14, 2008 at 8:37am by Dr Russ*

**Chemisty**

If ten drops of 0.3 M HCl are mixed with ten drops of 0.3 M Na2S2O3, what will be the concentration of each chemical in the mixture? Please help, i am pretty sure that the concentration should be 0.3 M but i am not sure if i am supposed to do somthing with the ten drops. Thank...
*Wednesday, January 7, 2009 at 10:39pm by Nancy*

**math**

The volume of a pyramid is V=1/3Bh where B is the area of the base and h the height from the base to the apex. This works for any location of the apex, provided that h is measured as the perpendicular distance from the plane which contains the base. so yes, this statement is ...
*Sunday, May 2, 2010 at 3:08pm by lauren*

**GEOMETRY(SURFACE AREA)**

lateral edge is an edge from the base to the vertex. As opposed to a base edge. If the base edge is 6, the base diagonal is 6√2 Now draw a right triangle from the center of the base to the vertex, including one base corner. (6√2/2)^2 + h^2 = (√34)^2 18 + h^2...
*Sunday, July 14, 2013 at 9:57am by Steve*

**liberal arts**

how to convert the number 15,257 to base 13 and the answer
*Tuesday, September 17, 2013 at 8:28pm by renee*

**heeeeeelp computer**

A Harshad Number in a given number base is an integer that is divisible by the sum of its digits when written in that base. For example, the number 11 in base 5 (which is 6 in base 10) is divisible by 1 + 1 = 2 in base 5. It is therefore a Harshad number in base 5. 1 is the ...
*Friday, July 5, 2013 at 9:11am by lin*

**Computer pls help**

A Harshad Number in a given number base is an integer that is divisible by the sum of its digits when written in that base. For example, the number 11 in base 5 (which is 6 in base 10) is divisible by 1 + 1 = 2 in base 5. It is therefore a Harshad number in base 5. 1 is the ...
*Sunday, July 7, 2013 at 8:30am by lin*

**math**

alana has 5 base ten blocks.She has at least one of each type of block.The value of her blocks is greater than 140.What blocks could she have?
*Tuesday, October 2, 2012 at 9:52pm by ronel*

**Maths**

(1)Evaluate 54 base 6 + 305 base 6, give your answer in base 6 (2) evaluate 785 base 9 + 306 base 9 , give your answer in base 9
*Saturday, November 2, 2013 at 4:34pm by Virgie*

**Algebra**

In my history book the expression square root (with a 3 in the nook( around a square root of ten is given. It says it equals the square root of ten with 6 in the nook. However, I don't understand where the six came from. I thought you multiply the two things in the nooks ...
*Wednesday, September 9, 2009 at 9:21pm by Eve*

**3rd grade math**

regroup the ten ones as 1 ten again
*Tuesday, February 26, 2013 at 3:50pm by summer*

**chemistry**

millimoles HNO3 = mL x M = 50.00 x 0.3M = 15 millimoles. mmoles KOH = mL x 0.6M = mL = 0, 0mmoles KOH mL = 15.5, 9.3 mmoles mL = 25.0, 15 mmoles mL = 40.0, 24 mmoles I'll do the 15.5 or 9.3 mmoles KOH added. ..........HNO3 + KOH ==> KNO3 + H2O initial...15......0........0...
*Friday, December 2, 2011 at 6:50pm by DrBob222*

**math**

It is much to cold to wash them out tide. It's ten words not ten letters!
*Monday, September 1, 2008 at 10:48am by Evan*

**chemistry laboratory**

1. You don't say what the pH must be. Decide that, use pH = pKa + log(base)/(acid) and calculate the base/acied ratio, then convert to mass. 2. How many mols NaOH do you need? mols NaOH = M x L = ? mols = grams/molar mass.Solve for grams.
*Thursday, May 31, 2012 at 11:48pm by DrBob222*

**algebra**

Kay, I think Mel is looking for an answer in a different base system. Mel, what base are you talking about? If you are takling about base 10? If so, then the answer is 2. OR... Are you talking about base 3, base 4, base 5, which one?
*Wednesday, February 20, 2008 at 4:56pm by Guido*

**2nd grade math**

Count the units and when you get to ten, exchange for a ten bar and put it in with the tens.
*Sunday, October 4, 2009 at 12:32pm by bobpursley*

**Biochemistry**

For 1 L of 0.2 M buffer, you want acid + base = 0.2 pH = pKa + log(base)/(acid) 4.40 = 4.76 + log(base/acid) base/acid = 0.436 but you should confirm that. I estimated here and there. That gives you two equations; solve them simultaneously for acid and base concnc. eqn 1 is ...
*Thursday, March 3, 2011 at 5:54am by DrBob222*

**Chemistry**

mmoles acid = 15.9 x 0.0551 = ? mmoles base = 0.488/molar mass Na2C2O4) pH = pKa2 + log(base)/(acid) You must convert pKb above (you want the HC2O4^- to pKa by pKa + pKb = pKw = 14. Also, I have not taken the volume into account and used ONLY millimoles. Since that is a ratio...
*Tuesday, December 6, 2011 at 10:34am by DrBob222*

**Algebra**

Think of doing it without a calculator first. To what power would you raise a base of ten in order to get the number 85? Think of the relationship between logs and exponents! 10 ^ 1.93= 85.11380382. The subscripted number is the base (a bass voice is a low voice). What the log...
*Saturday, January 17, 2009 at 11:28am by Brandon*

**elementary math**

what does it mean on the instructions if it says "Use a ten-frame and O to make a ten. Find the sum."
*Thursday, September 6, 2007 at 7:49pm by joe*

**vocabulary**

ten words with different meanings... ten words with different related words... ten blended words...
*Tuesday, September 18, 2007 at 10:37am by klar maesen*

**math**

Marie used base-ten blocks to model 328 she used 3 hundreds, 2 tens, and 8 ones. for what could you trade one of the tens?
*Wednesday, October 5, 2011 at 9:55am by amor*

**Math**

In the base-ten numeral 770, which place is the digit that repersrnts a value that is 10 times the value of the 7 in the tens place?
*Monday, February 4, 2013 at 11:13pm by Ashia Tate*

**Math**

log(base a)(a^4*b)-log(base a)(a*b) = log(base a)[a^4b/ab] = log(base a) (a^3) The power to which a has to be raised to get a^3 is 3. That is what log(base a) a^3 means. The answer is 3.
*Thursday, January 21, 2010 at 6:34pm by drwls*

**Math**

What place value is ten times smaller than ten millions place? A) hundred trillion B) one trillion C) hundred billion D) ten billion I think it's ones place. But that's not an option, maybe they did a typo.
*Sunday, November 27, 2011 at 9:20pm by Jazmin*

**English**

1. I was sad at the sight of the scene. 2. I was sad to see the scene. 3. I was sad when I saw the scene. (Do they have a similar meaning?) 4. Let's make it at ten. (What is the meaing of 'make it' in the sentence? Does #4 mean #5?) 5. Let's meet at ten. 6. Finally he made it...
*Saturday, December 5, 2009 at 3:56am by rfvv*

**math**

hasan made a model for 437 using, 4 hundreds, 3 tens, and 7 ones. what are two otherways he could show 437 using base ten blocks
*Wednesday, September 21, 2011 at 11:32pm by Anonymous*

**English**

Franco, Please go over these aloud, and then post the ten (no more than ten) that you absolutely have no clue about.
*Wednesday, January 27, 2010 at 6:31am by Writeacher*

**Chemistry**

convert m to inches. convert inches to feet. convert feet to miles convert seconds to hrs 3E8m/s*39.37inches/m * 1ft/12inches * 1mile/5280ft * 3600sec/hr
*Thursday, July 15, 2010 at 7:07pm by bobpursley*

**science:Chemistry**

Convert volume to L 100cm^3=100mL=0.100L Multiply your volume by the molarity given for each one and subtract moles of acid from moles of base. looking at the numbers, I see that you are going to get more moles of base than acid, (i.e., 0.01 moles of NaOH. But double check. ...
*Thursday, January 31, 2013 at 5:26pm by Devron*

**SraJMcGin spanish**

i just got home from rehersal and i have a spanisg collage due tomorrow i need to get ten oics about what i am doing in the next ten years and put sub headings under them in spanish. i will have these done by no later than 11 pm -- it is ten sentences but i need to find the ...
*Wednesday, April 22, 2009 at 11:52pm by sam*

**math**

Estimating? 11 percent is ten percent with ten percent of that added.. 205+21=226 26 precent is about 1/4, th 510 32 percent is nearly one third.. 700 47 percent is half minus half of ten percent of that. 1025-50=975 Now work out the actual numbers, and compare.
*Wednesday, March 11, 2009 at 1:56pm by bobpursley*

**maths**

40(base)=(1/2)(base)(height) 80(base)=(base)(height) Divide by base and they both drop out 80=height
*Saturday, December 8, 2012 at 2:21am by Mac*

**math**

i have 2 math questions i dont understand so if you could help me i would like that. Log base 3 64-log base 3 (8/3)+log base 3 2=log base 3 4r Log base 6 (b^2+2)+logbase6 2=2
*Sunday, February 10, 2008 at 8:01pm by Jz*

**Physics**

If i have ten grains of sand on a flat, 8x8 chessboard, randomly distributed, what is the probabilty that all ten are on the same square?
*Friday, October 8, 2010 at 8:44pm by Jessica*

**math**

Your first answer is correct. The second problem asks you to round the number to the nearest TEN THOUSAND, not ten-thousandths.
*Monday, January 10, 2011 at 8:23pm by Ms. Sue*

**MATHS**

USING ONLY THE NUMBER FOUR, PLACE TEN MONEY AMOUNTS IN THE TEN BLOCKS OF THIS PYRAMID TO TOTAL $10,000
*Friday, July 1, 2011 at 7:03am by GURVINDER*

**MATHS**

USING ONLY THE NUMBER FOUR, PLACE TEN MONEY AMOUNTS IN THE TEN BLOCKS OF THIS PYRAMID TO TOTAL $10,000
*Friday, July 1, 2011 at 7:13am by GURVINDER*

**Chemistry**

pH = pKa + log (base)/(acid) pH = ? pKa you have (or can calculate it from Ka). base = NaF and molarity NaF = mols/L. You have grams, convert to mols. acid you have in M now. Plug and chug.
*Monday, June 17, 2013 at 10:36pm by DrBob222*

**3rd grade**

HASAN MADE A MODDEL FOR 437 USING 4 HUNDREDS, 3TEN AND 7 ONE.WHAT ARE TWO OTHER WAYS HE COULD SHOW 437 USING BASE-TEN BLOCKS?
*Wednesday, September 2, 2009 at 2:57pm by zion*

**Math**

Hasan made a model for 437 using 4 hundreds, 3 tenns, and 7 ones. What are two other ways he could show 437 using base-ten blocks?
*Wednesday, August 10, 2011 at 8:37pm by Diamond Burnette*

**chemistry**

millimoles acetic acid = 1000 mL x 0.01M = 10 mmole sodium acetate = 1000 mL x 0.1M = 100. 5.00 = 4.74 + log(base/acid) base = 100-x acid = 10+x Solve for x where x = mols HNO3 added. Then convert to volume needed of the 10M HNO3.
*Wednesday, April 18, 2012 at 4:42pm by DrBob222*

**algebra**

If you want to use a calculator to evaluate the above expression, you will need to understand the above expression is evaluated from right to left, so appropriate sets of parentheses must be inserted. In fact, the above expression can be evaluated mentally to a simple fraction...
*Sunday, November 6, 2011 at 10:08am by MathMate*

**chemistry 1046**

It's easier to solve this one with the Henderson-Hasselbalch equation BUT if you must use the ICE chart, here it is. ......CH3NH2 + HOH ==> CH3NH3^+ + OH^- I.....0.266.............0..........0 C........-x.............x..........x E.....0.266-x............x.........x ..........
*Tuesday, July 3, 2012 at 8:25am by DrBob222*

**Chemistry**

I THINK this problem is asking for the amount NH4Cl to add to 3M NaOH so that YOU WILL END UP WITH 0.1M NH4^+ in 500 mL. That will be 0.05 mol NH4Cl in 500 mL. ......NH4^+ + OH^- ==> NH3 + H2O I.....x........0........0 E...0.05.......0........y 9.50 = 9.26 log (base)/(acid...
*Monday, March 18, 2013 at 5:24pm by DrBob222*

**Math**

Hello Diana, Remember the three basic rules when dealing with logs: n * log(A) = log(A^n) log(A) + log(B) = log(A*B) log(A) - log(B) = log(A/B) Also note that log, and ln are both logarithms and interchangable, just with base 10 for log and base of nature exponent e for ln. ...
*Friday, March 2, 2012 at 10:04am by Brandon*

**English grammar**

Use a singular verb with sums of money or periods of time. Ex) Ten dollars _____ a high price to pay. Ten dollar is a sum of money, so you have to use a singular verb. In this case, the subject acts as a unit. I'll give you another example. ex) Ten years is a long time. In ...
*Wednesday, December 12, 2007 at 6:38am by John*

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