Number of results: 92,605
Math
Here it is, in a little more detail: (13/102) / (1-13/102) = (13/102) / ((102-13)/102) =(13/102) / (89/102) =13/89 =13:89
Saturday, November 28, 2009 at 9:26pm by MathMate
chemistry please help
The FM band of radio waves are measured in megahertz (MHz), which are the numbers you see on the radio dial. Therefore, a radio station at 102.5 on the FM dial has a frequency of 102.5 MHz or 102,500,000 Hz. What is the wavelength of the radio station that has a frequency of ...
Sunday, October 31, 2010 at 9:58pm by Tamina
Chemistry..
mol mass of Al2O3 = 2*27 + 3*16 = 54+48 = 102 fraction of Al in compound = 54/102 so 5 (54/102) = 2.65 kg of Al in the 5 kg of compound
Monday, December 31, 2012 at 5:20pm by Damon
Math
102 = 3.14 x 42.25 x h 102 = 132.665h 102 / 132.665 = h 0.76885388007 = h
Saturday, March 30, 2013 at 10:36pm by Ms. Sue
algebra
102 litre+0.01 m^3=? 102 liters is 102 * 10^-6 m^3 still confused x2+10=
Saturday, February 3, 2007 at 7:08pm by Marcela
Chemistry
If a system has 2.50 × 102 kcal of work done to it, and releases 5.00 × 102 kJ of heat into its surroundings, what is the change in internal energy of the system?
Friday, November 11, 2011 at 2:33pm by Harley
urgent math
no, you solve the equation ( why would you think to just pick any number ??) 25x + 40(3x) = 14790 25x + 120x = 14790 145x = 14790 divide by 145 x = 102 so they should make 102 units of lumber and 3(102) or 306 units of plywood. check 102(25) + 306(40) = 14790
Sunday, September 20, 2009 at 3:49pm by Reiny
Math
360*5-sum2= sumlastthree 1800-201= 1599 = sumlast three But all have to be greater than 102 so let the first two be 102, 103, lowest that they can be. 1599-102-103= last digit. so figure the last digit.
Friday, January 29, 2010 at 1:20pm by bobpursley
Math
the vertex is at (214.26,102.51) So, y = C(x-214.26)^2 + k 102.51 = C(0)^2 + k so, k = 102.51 y = C(x-214.26)^2 + 102.51 0 = C(432-214.26)^2 + 102.51 C = -0.002162 y = -0.002162(x-214.26)^2 + 102.51 y = -.002162x^2 + .92646x + 3.25831 y = -.002162(x+3.4885)(x-432)
Monday, January 23, 2012 at 8:43pm by Steve
Arithmetic
t6 + t15 = -141 t15 - t6 = -7*9 = -63 2 t15 = -204 t15 = -102 t1 = -102 + 14*7 = -4 The sequence is -4, -11, -18, -25, -32, -39, -46, -53, -60, -67, -74, -81, -88, -95, -102 and the first term is -4.
Thursday, February 11, 2010 at 1:16am by drwls
math
prob both red = (26/52)(25/51) = 25/102 prob both same colour = 25/102 + 25/102 = 50/102 = 25/51 prob (queen then king) = (4/52)(4/51) = 4/663 prob( black then queen of hearts) = (26/52)(1/51) = 1/102
Monday, November 26, 2012 at 11:06pm by Reiny
Chemistry
You have 4.271 x 102 mL of oxygen gas (O2) at 7.656 x 102 mm of Hg and 78 oC. What is the mass of the sample in milligrams? What is the ratio of effusion rates for a light gas, such as HF, to a heavy gas, such as UF4?
Tuesday, April 16, 2013 at 9:49pm by Tif
algebra
0.85x = 102 x = 102/0.85 x = $120
Wednesday, January 30, 2013 at 9:11pm by Ms. Sue
Physics
A 1.0 102 g piece of copper at a temperature of 460 K and a 2.0 102 g piece of aluminum at a temperature of 2.2 102 K are dropped into an insulated bucket containing 5.0 102 g of water at 280 K. What is the equilibrium temperature of the mixture? (Use the specific heats found ...
Monday, November 26, 2012 at 1:03pm by Ray
AP Chemistry
A balloon is filled to a volume of 2.0 102 mL at a temperature of 33.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon?
Monday, October 15, 2012 at 3:49pm by Ashley
Chemistry
A balloon is filled to a volume of 1.0 102 mL at a temperature of 38.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?
Friday, June 11, 2010 at 1:43pm by Brittney
math
this is very simple im an 8th grader in algebra 1 and this is just a piece of cake u need to write an equation, total:102 students 4th grade class:3x mrs prides class:x this is a division prob. so ur eq should be 3x=102 x=102/3 x= 34 good luck, hoped this helped u!!!!!:)
Thursday, January 3, 2013 at 11:07pm by bieber510
Chemistry
You have 4.271 x 102 mL of oxygen gas (O2) at 7.656 x 102 mm of Hg and 78 oC. What is the mass of the sample in milligrams? When alcohol evaporates according to the equationC2H5OH(l) --> C2H5OH(g), how many liters of gaseous alcohol, measured at STP, are created by the ...
Wednesday, April 17, 2013 at 12:55pm by Tif
Algebra
-3(x^2+2)=102 x^2+2=102/-3 x^2=-34-2 x=sqrt32
Sunday, March 7, 2010 at 9:04pm by nancy
chemistry
A balloon is filled to a volume of 5.0 102 mL at a temperature of 28.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon? the answer i got is v=166.66666667 My question is what is the correct sig. ...
Thursday, April 29, 2010 at 8:50pm by chase
Algebra
the sum of the first 102 counting numbers is 102*103/2=10506/2=5253. So the remainder divided by 5250 is 3.
Monday, April 4, 2011 at 8:18am by MathMate
Physics
Well, I suppose I am to assume that you stopped in 108 meters. first you went 12.7*.47 = 5.97 m before your foot hit the brake. So the brakes must stop you in (108 -6) = 102 meters That is the answer you asked for. ----------------------------------- The rest of the problem: ...
Saturday, January 28, 2012 at 3:31pm by Damon
pre calc
I assume you wont have a double side on the adjoining sides. If you do this, you have 102 m of perimeter, to do 3 widths (two ends and center fence), and 2 lengths. Area= lw P= 3w+2L or L= 1/2(102-3w) Area= 1/2 w(102-3w) This is easy in calc, but I assume you are not there ...
Sunday, January 20, 2008 at 5:53pm by bobpursley
Chemistry, Urgent!
Down to moles oxygen = 0.6 is ok. 0.6 moles oxygen means how many moles X2O3 were formed? 0.6 moles O2 x (2 moles X2O3/3 moles O2) = 0.6*2/3 = 0.4 moles X2O3 moles = grams/molar mass rearrange to molar mass = g/moles = 40.8/0.4 = 102 so molar mass X2O3 = 102. So molar mass is...
Wednesday, May 13, 2009 at 3:31pm by DrBob222
MATHEMATICS_algebra
first such number -- 102 last such number -- 198 (198-102)/6 = 16 but !! ..... let's look at the first 4 of our numbers: 102 108 114 120 if I follow my above method I would get (120-102)/6 = 3 notice I would not be counting the very first number so our answer of 16 should ...
Sunday, February 5, 2012 at 8:31am by Reiny
chem
91.4/0.893 = 102.3 grams produced at 100% yield. Using the 102.3, use conventional stoichiometry to solve for Al2O3 initially. Here is a sample problem I posted. http://www.jiskha.com/science/chemistry/stoichiometry.html
Wednesday, September 15, 2010 at 10:39am by DrBob222
Math(Can someone please answer!!)
ln(.023)=ln(.102)-2360k 2360k=ln(.102)-ln(.023)=ln(.102/.023) k= about 1.49/2360=6.31E-4
Sunday, March 11, 2012 at 5:45pm by bobpursley
chemistry
I agree with you, mol masses 138 and 102 C7H6O3 + C4H6O3 ---> C9H8O4 + HC2H3O2 360/138 or 2.61 mole of C7H6O3 and therefore 2.61 mol of C4H6O3 2.61 = x/102 x = 267 (I did not carry all the decimal places)
Friday, January 23, 2009 at 7:52pm by Damon
math
8' 6" = 102 inches V = 102 * 4 * (1/2) V = 204 cu. in. 204 * 0.25 = _____ weight of iron bar
Monday, July 16, 2012 at 4:55pm by Ms. Sue
Math
What is the cardinal number for the follwing sets? 1). 101,102,103,104,....121 2). (1,2) (101,102) (0,105)
Thursday, December 11, 2008 at 6:59pm by Bria
Math
What is the cardinal number for the following sets? A) 101,102,103,104,.......121 B) (1,2), (101,102), (0,105)
Thursday, December 11, 2008 at 4:50pm by Bria
chemistry
Your answer leaves me with 1.63 so is this wrong moles oxalic acid = 0.500 L x 0.122 M=0.610 the ratio between Fe2O3 and H2C2O4 is 1 : 6 moles Fe2O3 = 0.610/6=0.102 mass Fe2O3 = 0.102 mol x 159.69 g/mol=16.3 g It left me with 16.3
Monday, October 4, 2010 at 8:49am by amber
Math
Maybe you should repeat 3rd grade next year. 106 - 104 = 2 104 - 102 = ? 102 - 100 = ?
Wednesday, February 20, 2013 at 5:28pm by Ms. Sue
MATH RATIO AND RATE
102/14 = Divide: 102/14 = 7.2857 or 7 2/7
Monday, December 3, 2012 at 9:22pm by Ms. Sue
chemistry
A fuel mixture used in the early days of rocketry is composed of two liquids, hydrazine (N2H4) and dinitrogen tetraoxide (N2O4), which ignite on contact to form nitrogen gas and water vapor. 2 N2H4 + N2O4 --> 3 N2 + 6 H2O If 1.50 x 102 g of N2H4 and 2.00 x 102 g of N2O4...
Sunday, November 4, 2012 at 7:38pm by Sheree'
algebra
multiply the first equation by negative 2 4x+16y=-84 check the sign, ==42? -4x+6y=-18 add the equations.... 24y=-102 y=102/24
Thursday, July 5, 2012 at 1:15pm by bobpursley
Chemistry
Question: A sample of Freon-12 (CF2Cl2) occupies 2.261 x 101 L at 337 K and 2.917 x 102 kPa. Find its volume (in L) at standard temperature and pressure (STP). Equation: p1v1/t1=p2v2/t2 My Work: (2.917 x 102 kPa)(2.261x101 L)/337K = (101.3 kpa)( x )/273 k My Answer: 543.4 L Is...
Wednesday, July 13, 2011 at 12:06am by Bradley
algebra
OK, typing on here requires more parentheses than in a book where you can set up type : 5/8 = 5 / (2 * 2 * 2) 2/15 = 2 / (5*3) 17/20 = 17/2*5*2 least common denominator is 2*2*2*3 *5 = 8*15 = 120 so I multiply all terms by 120 120(5/8) t + 120(2/15) t = 120 (17/20) 75 t + 16 t...
Thursday, February 21, 2008 at 8:33pm by Damon
Mathematics-please help!
9/28 + 3/(x+2) = 3/4 Multiply both sides by 28: 9 + 84/(x+2) = 21 LCD = (x+2). 9(x+2)/(x+2) + 84/(x+2) = 21 Combine like-terms in numerators: (9x + 102)/(x+2) = 21 Cross multiply: 21x + 42 = 9x + 102 21x - 9x = 102 - 42 12x = 60 X = 5.
Saturday, June 9, 2012 at 7:42am by Henry
math
60 * 85 = 5100 2550/25 = 102 2550/20 = 127 + 10 over 102 + 127 = 229 I guess you are right.
Monday, March 18, 2013 at 7:55pm by PsyDAG
chemistry
what is (in)? what does =102 mean?
Wednesday, January 20, 2010 at 7:09pm by bobpursley
math
If you have 5 items with a mean of 98, then the sum of all items is 5*98 = 490 If you have 6 items with a mean of 102, the total is 6*102 = 612 Other than that we know nothing. Now, if you meant to say that adding the 6th item raised the mean from 98 to 102, then the 6th item ...
Thursday, September 29, 2011 at 10:26pm by Steve
Statistics
87,89,90,90,98,99,99,101,102,103,104 Within how many standard deviations of the mean is the value 102?
Tuesday, June 5, 2012 at 4:06pm by Anonymous
Statistics
98,99,99,103,101,102,104,89,87,90,90 Within how many standard deviations of the mean is the value 102?
Tuesday, June 5, 2012 at 3:30pm by Anonymous
Physics
On the moon the surface temperature ranges from 395 K during the day to 1.02 x 102 K at night. Convert these temperatures to the Celsius and Fahrenheit scales. (a) 395 K in degrees Celsius; (b) 395 K in degrees Fahrenheit; (c) 1.02 x 102 K in degrees Celsius; (d) 1.02 x 102 K ...
Tuesday, December 11, 2012 at 10:55am by Anonymous
Chemistry
(39.0 x 9/5)+32.0 = 102.2 F.
Wednesday, June 15, 2011 at 7:02pm by DrBob222
physics
d = 2pi*r, d = 6.28*55 = 345.6m = Linear distance, d = 0.5*at^2 = 345.6 m, 0.5a*(14.3)^2 = 345.6, 102.2a = 345.6, a = 345.6 / 102.2 = 3.38 m/s^2.
Tuesday, October 26, 2010 at 9:36pm by Henry
trig
Draw a diagram. vertical line for the tree, line OT slanting line going down to the right at an angle if 15 degrees, of length 102, OS Angle OTS is 62 degrees. Angle TOS = 105 degrees. so, angle OST = 13 degrees Using the law of sines, the height of the tree, OT is given by OT...
Tuesday, November 8, 2011 at 1:15am by Steve
chemistry-Buffer Q
Yes, you would have concn BUT M = moles/L so if you know moles and M you can calculate L and convert to mL. I think you have the right idea; you just quit too soon. moles NH3 = 1.74/17.03 = ? moles (NH4)2SO4 = 4.19/132.14 = ? and that x 2 = about 0.0628 ...........NH3 + H...
Monday, November 14, 2011 at 6:47pm by DrBob222
physics
Required volume flow rate: 164m^3/(26.8*60 s) = 0.102 m^3/s That equals (Area)*(Velocity). For a square duct, Area = a^2. a is the side length of the square. a = sqrt(0.102/V) Plug in the numbers. Solve for a.
Sunday, April 15, 2012 at 8:20am by drwls
chemistry
At what temperature (in ) does acetone have = 102
Wednesday, January 20, 2010 at 7:09pm by aamani
Chemistry-102
Use the Henderson-Hasselbalch equation.
Sunday, March 27, 2011 at 5:52pm by DrBob222
Please help with steps: Geometry
Two mountain bikers have been separated and are hoping to find each other. One biker reads on her GPS that she is located at 102.9 degrees west and 44.1 degrees north. She decides to ride towards the mountain peak, which on the map has the coordinates 102.5 degrees west and 44...
Wednesday, November 2, 2011 at 8:23pm by Erika
Discrete Math
Yes, there's a typo. It's actually 3+4+4+4+4+5+6=30 and there's a graph included in this problem but I don't know how to show the graph so that was why I just described how it looked like with all the vertices and degrees of each. Let me list those vertices and...
Friday, April 22, 2011 at 1:09am by yengiang
algebra
You can find the sum of the first 102 counting numbers using Gauss's method, namely: "the sum of the first n counting numbers is n*(n+1)/2" whether n is odd or even. For n = 102, the sum is 102*103/2=10506. So divide 10506 by 5220 to get a quotient of 2, with a ...
Monday, April 4, 2011 at 8:11am by MathMate
math
errrgg..i meant i figured out #2 i need help with #1. My formula is as instructed. B=a/p (Base=amount/percent) My answer is: B=102.00/0.15 B=6.80 so the regular prices is 102.00+6.80=108.80 Is that correcT?
Thursday, February 11, 2010 at 7:01pm by marco
Math
Worked for 15.75 hours? Paid $102.375??? 102.375/15.75 = $6.50 per hour
Wednesday, October 17, 2012 at 8:47pm by Ms. Sue
chemistry
delta T = 102.37-100 = ? i = 3 Kb = 0.512 m = ?
Monday, May 13, 2013 at 11:53am by DrBob222
chemistry university
is it 102 mg rounded to 3 significant figures.
Monday, April 15, 2013 at 4:45am by angela
Chemistry
What is the freezing point of an aqueous solution that boils at 102.1 C?
Monday, April 26, 2010 at 5:26pm by Justin
chemistry
hexyl alcohol is 102 propyl ether is 98
Thursday, April 1, 2010 at 12:03am by DrBob222
math
Thanks. I was translating the problem incorrectly. I got the right answer using the formula A=P*B A=15*102 A=15.30 15.30 + 102.00 = 117.30 Thanks.
Thursday, February 11, 2010 at 7:01pm by marco
math
Thanks. I was translating the problem incorrectly. I got the right answer using the formula A=P*B A=15*102 A=15.30 15.30 + 102.00 = 117.30 Thanks.
Thursday, February 11, 2010 at 7:01pm by marco
math
2 + 10 = 12 12 + 20 = 32 32 + 30 = 62 62 + 40 = 102 102 + ? = ______?
Tuesday, February 5, 2013 at 4:28pm by Ms. Sue
Chemistry
Calculate molar masses and show that they add up on both sides. For example, the first one. KClO3 is 122.549 and 2 moles would be 2 x 122.549 = 245.098. On the right we have 2 x 74.551 = 149.102 for 2KCl 3 x 31.9988 = 95.9964 149.102+95.9964 = 245.098 so the product decomposes...
Monday, April 5, 2010 at 1:36pm by DrBob222
MATH Prob.
the prob of a spade and a heart = 2(13/52)(13/51) = 13/102 so the prob of NOT a spade and a heart = 1 - 13/102 = 89/102 so the odds in favour of drawing a spade and a heart is 13:89
Tuesday, August 11, 2009 at 11:38pm by Reiny
Math whoops
whoops 102 = 2*51 = 2*3*17 15 = 3*5 27 = 3*3*3 36 = 2*2*3*3 16 = 2*2*2*2 28 = 2*2*7 57 = 3*19 102 = 2*51= 2*3*17 268 = 2*2*67 4518=2*2259 = 2*3*753 = 2*3*3*251 93 = 3*31
Monday, November 28, 2011 at 6:07pm by Damon
Chemistry-102
Alright I have the equation but I still don't get how to set it up.
Sunday, March 27, 2011 at 5:52pm by Christian
Chemistry
Wait never mind I figured it out. 1/F = F so 1/102 right?
Tuesday, April 13, 2010 at 8:37pm by Amphee
chemistry
At what temperature (in degrees C) does acetone have Pvap= 102 mmHg?
Monday, January 25, 2010 at 9:00pm by Lauren
Math
Most of the time, you would convert numbers from "foreign" bases to base 10, then convert to the target base by division. From a number in base n, we recognize that each digit from the right represents n^x, where x is the position from the right. So 2526 = 2*6&...
Wednesday, June 30, 2010 at 9:03pm by MathMate
statistics
98,99,99,103,101,102,104,89,87,90,90 Find the 25th and 75th percentiles. Within how many standard deviations of the mean is the value 102. Find the interquartile range.
Monday, June 4, 2012 at 8:09pm by Anonymous
Chemistry
HCl + NaHCO3 => H2O + CO2 + NaCl Convert the 0.102 g CO2 to g NaHCO3. 0.102g CO2 x (molar mass NaHCO3/molar mass CO2) = 0.102 x 84/44 = 0.195. Is that 0.195 you posted what you obtained. Then %NaHCO3 = (0.195/0.358)*100 = about 54.4%. Check that. If your earlier reply ...
Friday, October 19, 2012 at 10:08pm by DrBob222
Algebra 2
hard to show long algebraic division on this forum, I hope you are familiar with synthetic division It will look something like this 3 | 3 4 -7 6 ........9 39 84 ... 3 13 32 102 so (3x^3+4x^2-7x+6) / (x-3) = (3x^2 + 13x + 32) + 102/(x-3)
Saturday, March 31, 2012 at 2:36am by Reiny
chem
C2H4Br2 + 3 I- -> C2H4 + 2Br- + I3- [C2H4Br2]M [I1]M Initial Rate (M/s) 1 0.127 0.102 6.45 x 10-5 2 0.343 0.102 1.74 x 10-4 3 0.203 0.125 1.26 x 10-4 Determine the order of the reaction in C2H4Br2:
Sunday, February 4, 2007 at 5:24pm by kim
CHEM
Use PV=nRT This will give you the number of moles. 143.289-143.187 = 0.102 is the mass of n moles so 0.102/n is the molar mass or mass of one mole.
Tuesday, July 22, 2008 at 1:40am by Dr Russ
Chemistry
How do you tell the difference between reactants and products with no arrow? And 1.3 102 means what?
Sunday, December 2, 2012 at 4:36pm by DrBob222
Chemistry
(a) q = mass x specific heat x delta T q = 102 x 4.184 x (41-21)
Tuesday, June 7, 2011 at 8:25am by DrBob222
Chemistry 102
By looking up the solubility product of AgCl. It will help to know if Ag2SO4 has a Ksp or not.
Wednesday, April 21, 2010 at 6:26pm by DrBob222
chemistry
R is 0.08206 with V in L and P in atm. R is 8.314 with V in L and P in kPa. By the way, I have no idea what the 0.455 is in your post and there are no units. I ignored it. 0.0103 is n either way. n = (PV/RT) = (772 x 0.250)/(760 x 0.08206 x 300) = 0.0103 = n 772 x 101.325/760...
Wednesday, August 31, 2011 at 6:51am by DrBob222
math
What the patters is supposed to show is.. in 537^102 you only have to look at what happens to the ones digit e.g. 537^0 = 1 vs 7^0 = 1 537^1 = 537 vs 7^1 = 77 537^2 = 288369 vs 7^2 = 49 537^3 = 157854153 vs 7^3 = 343 537^4 = 8315....1 vs 7^4 = 2401 notice the last digit is ...
Friday, October 21, 2011 at 8:21pm by Reiny
geometry
I drew the vector for ship # 1 @ 0 deg and ship # 2 @ 140 deg. d1 = 26 mi / h * 3 h = 78 mi @ 0 deg. d2 = 34 mi / h * 3 h = 102 mi @ 140 deg. d = 102 mi @ 140 deg - 78 mi @ 0 deg. X = hor = 102 * cos140 - 78cos0, = -78.1 - 78 = - 156.1 mi. Y = ver = 102sin140 - 78sin0 = 65.6...
Thursday, November 4, 2010 at 1:14am by Henry
Physics
A 3.60 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 18.0 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 102 W. How much time does it take to lift the piano?
Monday, February 25, 2008 at 3:48pm by Peter
Chemistry
Calculate the number of moles in these quantities. 1. 25.0 g KNO3 2. 5.4 x 102 g (NH4)2C2O4
Sunday, March 20, 2011 at 12:23am by Netta
organic chemistry
102% probably not a valid response. My best guess is that the crystals were not dry.
Monday, June 14, 2010 at 9:19pm by DrBob222
Math
63 / 17500 = 7 * 9 / ( 7 * 2500 ) = 9 / 2500 = 4 * 9 / ( 4 * 2500 ) = 36 / 10000 = 0.0036 102 / 125 = 8 * 102 / ( 8 * 125 ) = 816 / 1000 = 0.816
Friday, April 13, 2012 at 6:31pm by Bosnian
physics
A cheetah runs a distance of 102 m at a speed of 27 m/s and then runs another 102 m in the same direction at a speed of 34 m/s. What is the cheetah's average speed?
Saturday, September 18, 2010 at 2:18pm by john
Math
Rolle's Theorem states that on the interval (2,3) there will be a point c where f'(c) = the slope of the chord from f(2) to f(3) So, f(2) = 102 f(3) = 102 so, the chord has slope 0. so, at some point c in (2,3) f'(c) = 0 f'(t) = 80 - 32t f'(t) = where t = ...
Thursday, March 8, 2012 at 3:21pm by Steve
phyicis
during burn: v = 8.2t v(5) = 41 m/s h = 1/2 (8.2) t^2 h(5) = 102.5 m So, after 5 seconds, the rocket is 102.5 meters up, with a speed of 41.0 m/s. Now, only gravity provides acceleration, so h = 102.5 + 41.0t - 4.9 t^2 h=0 when t = 10.382 max h when t = -41.0/-9.8 = 4.18 h(4....
Monday, October 29, 2012 at 1:18pm by Steve
college chemistry
.361 g of a non-volatile solute is dissolved in 160.0 g of water. The solute does not react with water nor dissociate in solution. Assume that the resulting solution displays ideal Raoult's law behaviour. At 90 oC the vapour pressure of the solution is 5.1701×102 ...
Friday, February 18, 2011 at 7:50pm by silver
chemistry
102g Li2CO3 x (1 mol Li2CO3/73.891g Li2CO3) x (1 mol CO3^2-/1 mol Li2CO3) = ? The first term (102 x 1/73.891 converts 102 g Li2CO3 to moles Li2CO3. The second term tells you that there is 1 mol CO3^2- ions in 1 mol Li2CO3, another way of saying that since there is 1 mole CO3/...
Wednesday, February 8, 2012 at 6:39pm by DrBob222
chemistry
For each of the following explain how you would prepare 1.0 L of a solution that is 0.10 M in K+. Repeat for concentrations of 1.0 × 102 ppm K+ and 1.0% w/v K+.
Wednesday, September 12, 2012 at 12:44pm by Anonymous
Chemistry
A brownie contains 1.30 ×102 mg of sodium. What is this mass equivalent to it in units of grams?
Sunday, February 20, 2011 at 11:17pm by Des
chem
The molarity and the molality of a solution prepared by dissolving 2.00 g of ethanol C2H5OH with 100.0 g of water to give a final volume 102 mL are would i just add both the grams and divide by 102 for molarity? and molalty i would just add the mass?
Friday, August 8, 2008 at 6:49pm by so
math
The sum of two consecutive numbersis 205. whatare two numbers? (hint:let n represent the first number. then n + 1 represents the second number. ALternatively: 205/2 = 102.5 making the two numbers 102 and 103.
Thursday, November 1, 2007 at 11:05am by tchrwill
Chemistry
NaOH + HBr ==> NaBr + H2O moles NaOH used in the titration = M x L = 0.37 x 0.0878 = 0.03249. Using the balanced equation above, convert moles NaOH to moles HBr. The coefficients are 1:1; therefore, moles HBr = 0.03249 That = the moles in the 102.1 mL sample. How much ...
Sunday, May 1, 2011 at 11:00pm by DrBob222
Chemistry
A 1-ounce serving of Cheetos has 2.90 ×102 mg of sodium. What is this mass equivalent to in units of grams?
Tuesday, September 6, 2011 at 8:21am by Shelley
college: physics
A 4.00 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 16.0 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 102 W. How much time does it take to lift the piano?
Monday, October 12, 2009 at 7:53pm by Anonymous
Chemistry
Am I doing this right? mol NaHCO3 = grams/molar mass = 1/85 = 0.0117647059*3=0.0352941176 mols citric acid = g/molar mass = 1/316 = .003164557*3=0.009493671 So, the second one is correct and is the limiting reactant. 0.009493671 mols CO2 x 44 CO2 = 0.417721524 = .42 grams CO2...
Wednesday, November 7, 2012 at 4:21pm by Bailey
Chemistry
I think one problem may be that you are reporting only to two significant figures and you are allowed three. I agree with 5.844 g NaCl. For water I have 5.35 x 18.015 = 96.38 g. Total mass = 96.38 + 5.844 = 102.22 and (5.844/102.22)*100 = 5.7168 which rounds to 5.72 mass ...
Friday, March 26, 2010 at 5:29pm by DrBob222
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