Number of results: 1,786
chem
Do you know what the mole fraction is? Xgly=(nly/(ng+ nH2O. You know grams water, convert that to moles. You know moles glycerol = grams/molar mass and you know molar mass. You know Xglycerol = 0.093. Solve for grams glycerol which is the only unknown. After finding the moles ...
Sunday, November 22, 2009 at 7:19pm by DrBob222
Chemistry
mass-mass conversions and mass-mole conversions: what is the difference and how do you do each? mass is converted to mols by mols = grams/molar mass. mass of one chemical is converted to mass of another chemical by using the coefficients in the balanced chemical equation. For ...
Thursday, January 18, 2007 at 10:47pm by Briana
chemistry
I would do this but you must do the work. You must solve two simultaneous equation unless I've missed the boat. Let X = grams glucose and Y = grams sucrose. ======================== pi = osmotic pressure = MRT You know pi, R, and T, solve for M Molarity = moles x L You ...
Sunday, January 24, 2010 at 10:41pm by DrBob222
Biology
3.glucose
Sunday, November 4, 2007 at 8:42am by izlam
Biology
Something in these links may help you: http://search.yahoo.com/search?fr=mcafee&p=fatty+acid+is+to+fat+as+glucose+is+to+%3F Sra
Sunday, September 19, 2010 at 5:31pm by SraJMcGin
Grade 12 Chem - please check answer
I don't know but I assume C6H12O6 is glucose. It is a colorless solution but it doesn't conduct electricity since it doesn't ionize. Therefore, glucose can't be the answer for a). I suppose your answer is correct but if so it is a flawed question because Ca(OH)...
Sunday, June 1, 2008 at 3:24pm by DrBob222
biology - glycolysis +atp (help)
9. The total amount of energy released from the chemical bonds of glucose is 2870 kJ/mol, after the initial investment of 2 ATP. The total energy that can be harvested to form ATP molecules is about 1200 kJ/mol. a. After the initial investment of 2 ATP, 38 ATP are produced. ...
Wednesday, March 2, 2011 at 7:28am by Farah
Chem-Molality
delta T = Kb*molality. Look up Kb for ethanol and solve for delta T. You know the normal boiling point of ethanol, simply add delta T to find the new boiling point. Same procedure for freezing point except you subtract delta T from 0 C to find the new freezing point. delta T...
Sunday, April 17, 2011 at 5:45pm by DrBob222
chemistry
Two definitions: 1) molality = # mols/kg solvent 2) # mols = grams/molar mass From equation 1, you have molality and kg solvent (50 mL has a mass of 0.050 kg). Calculate mols. From equation 2, you know mols and molar mass, calculate grams.
Wednesday, December 3, 2008 at 2:36am by DrBob222
Chemistry
A mass of 0.630 g of NaCl is dissolved in 525 g of water. CAlculate the molality. mass of NaCl= 0.630g mass of H20= 525g molar mass of NaCl= 58.44 This is what i did it keeps telling me the answer is wrong. Convert grams to moles of NaCl 0.630 * 1 mol NaCl/58.44= 0.01078 ...
Thursday, May 21, 2009 at 9:43pm by Saira
Science
Sorry I responded so late, I had a class tonight. I'm not 100% sure on this one. C is partially correct because organisms do release heat after digesting plants and other materials but the heat does not come from photosynthesis, instead the origional energy for all energy ...
Wednesday, October 26, 2011 at 7:29pm by Harley
Physiology
Indicate the effect of the hormone on the response (increase, decrease, no effect)? 1.__________________ effect of secretion of insulin on blood glucose levels 2.__________________ effect of secretion of ADH on blood pressure 3.__________________ effect of secretion of ...
Wednesday, May 18, 2011 at 5:38pm by ivy
Chemistry
a) Photosynthesis is estimated to produce 360.0 g (dry weight) of plant matter per square meter, 50% of which is carbon. Calculate the total number of grams of carbon "fixed" each year by 1000 square meters.
 b) The photosynthetic reaction can be ...
Wednesday, April 7, 2010 at 2:48pm by Laura
AP CHEM
I got cross eyed looking at all the numbers. Let me break it down. Also, you don't say how much you want to make. I have assumed 100 g water as the solvent. Delta T = Kb*m (i is 1). 118.33-100 = 0.515*m solve for molality. molality = mols solute/kg solvent = mols solute /0...
Sunday, February 10, 2008 at 5:24pm by DrBob222
Biology
Among humans, increased interest in food intake normally occurs _____. only after the production of glucose in the liver can no longer meet metabolic needs when fewer calories are taken in than are expended, but only after the body depletes its reserves of fat in the liver via...
Wednesday, March 14, 2012 at 3:07pm by Jake
anatomy
(a) what are some of the physiology effects of infusing 500ml 0.9% glucose intravenously over an hour. (b)what are some of the physiology effects of infusing 500ml 5% glucose intravenously over an hour.
Monday, June 21, 2010 at 9:22am by secret
Chemistry
I would argue that this is a poor question because of the typo and poor wording. First, glucose is C6H12O6 so the molar mass is 180 and not 174. So the 3.5 moles glucose will provide 3.5 x 6 = 21 moles of H ATOMS. But due to poor wording in the problem, when I'm asked for ...
Saturday, November 5, 2011 at 9:11am by DrBob222
Biology
i believe it is glucose.
Tuesday, March 24, 2009 at 6:15pm by myname
science
glucose and maltose?
Sunday, September 2, 2007 at 6:17pm by Anonymous
College Chemistry
SURELY you have a typo. I don't know how you can dilute a 35.0 mL sample to 0.500 mL. You might dilute it to 0.500 L but not mL. I will assume you intended to write "A 35.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100...
Sunday, February 21, 2010 at 11:06pm by DrBob222
glucose monitors
In my class, we have to research on glucose monitors and pick two disadvantages and find a way to solve those disadvantages. The teachers know the students are not expert on designing a new product but using creativity, we have to come up with solutions For example: I put that...
Tuesday, October 9, 2007 at 12:23am by kelly
chemistry
how do you solve this? The candy indistry converts sucrose (C11H22O11,table sugar),a crystalline material, to invert sugar, a hydrolzyed [rpdict tjat os 50:50 frutose and glucose. The hydrolysis occurs in water, quite slowly, at an elevated temperature of 55¨¬C. The ...
Tuesday, July 27, 2010 at 5:44pm by Jin
chemistry
I gave you the answer for a from your first post. For #2. (1) delta T = Kf*m (2) molality = moles solute/kg (3) molar mass = grams solute/# moles. So if some of the solvent is spilled before the solute is added, that will mean the molality is too large (equation 2). So when we...
Wednesday, February 24, 2010 at 12:16am by DrBob222
Chemistry
delta T = Kf*molality Solve for molality. m = moles/kg solvent Solve for moles. You have m and 0.15 kg solvent) moles = grams/molar mass You have moles and grams, solve for molar mass.
Monday, November 22, 2010 at 7:43pm by DrBob222
chemistry
what is molality ?
Sunday, February 17, 2013 at 9:54am by shashi ranjan
chemistry
what is molality ?
Sunday, February 17, 2013 at 9:52am by shashi ranjan
chemistry
It is 1.5m (molality)
Sunday, December 11, 2011 at 4:50pm by Anonymous
Chemistry
m means molality
Sunday, February 14, 2010 at 9:29pm by Angel
Chemistry
m means molality
Sunday, February 14, 2010 at 9:29pm by Angel
Chemestry I
I answered this question yesterday for someone but I can't find the answer to copy it. Here is what you do; however, let me point out that I think you have a typo in the problem. I'm sure the freezing point is -0.102 and not +0.102. There are two problems here. A. ...
Sunday, October 26, 2008 at 7:19pm by DrBob222
chemistry
Use Raoult's law. You will find an explanation at http://learningcenter.unc.edu/Resources/Study/Guides/Chemistry%20102/Solutions The vant Hoff factor for FeCl2 will be 3, I believe. It dissociates into three ions. You are trying to elevate the boiling point by 3 Kb. 3 = ...
Sunday, July 18, 2010 at 7:52pm by drwls
chemistry
Atomic nature of glucose
Friday, August 15, 2008 at 8:40pm by LAly
Science 8th grade
glucose
Tuesday, March 25, 2008 at 8:13pm by melany
Science 8th grade
it 's glucose
Thursday, March 27, 2008 at 8:16am by ellie
biochemistry
please explain how to get these answers (answers provided): 1. If this cell were a muscle cell (myocyte), how many molecules of actin could it hold? (Assume the cell is spherical and no other cellular components are present; actin molecules are spherical, with a diameter of 3....
Wednesday, January 16, 2008 at 7:43pm by stew
Chemistry (Check)
Classify each of these statements as always true, sometimes true, or never true. 7____AT____It is necessary to know the formula of a compound in order to calculate its percent composition. 8___ST_____If the percent by mass of carbon in methane, CH4, is 75%, then 100 grams of ...
Sunday, February 11, 2007 at 3:48pm by Bryan
chemistry
Start by computing the percent CO2 and H2O, converting to percent C and H, then subtract from 100 to obtain percent O. Take a 100 g sample of that and each percent translates directly to grams C, H, and O. Convert g C, H, and O to moles C, H, and O. You want to find the ratio ...
Thursday, February 11, 2010 at 6:54pm by DrBob222
Chemistry
which solution has the highest boiling point? a. 1 mole of NaNO3 in 500 g of water b. 1mole of NaNO3 in 1000g of water c. 1mole of NaNo3 in 750g of water d. 1mole of NaNo3 in 250 g of water The boiling point of water is elevated by about 0.5 degree for a 1 molal solution. The ...
Monday, March 26, 2007 at 10:24pm by Kat
chemistry
delta T = Kf*m m = mols/kg solvent mols = g/molar mass. If delta T is too large, molality will be to large. If molality is too large, mols will be too large. If mols is too large, then molar mass will be too small.(from molar mass = g/mols).
Sunday, February 1, 2009 at 1:34am by DrBo222
chemistry
If you were betting you lost. delta T = i*Kf*m You know dT, i = 1, and Kf. Solve for molality. Molality = moles/kg solvent. You have m and kg solvent, solve for moles. moles solute = n = grams solute/molar mass solute. You know moles and grams, solve for molar mass.
Friday, February 3, 2012 at 4:35pm by DrBob222
Science
Try some of these links : http://search.yahoo.com/search?fr=mcafee&p=wwhy+E.coli+does+not+produce+acid+during+the+fermentation+of+glucose Sra
Wednesday, November 17, 2010 at 4:40pm by SraJMcGin
Chemistry
How do I do molarity,molality,and normality
Tuesday, December 14, 2010 at 8:34pm by Kayla
Chemistry
How do I do molarity,molality,and normality
Tuesday, December 14, 2010 at 8:34pm by Kayla
Chemistry
delta T = Kf*molality
Monday, October 18, 2010 at 5:47pm by DrBob222
CHEMISTRY- molality
how do i get the mole fraction?
Saturday, October 9, 2010 at 4:13am by lulu
Molarity/molality
I just dropped the last 5.
Friday, May 7, 2010 at 9:26pm by DrBob222
Chemistry
molality=molesNaCl/volumewaterinLiters
Thursday, February 19, 2009 at 7:03am by bobpursley
Chemistry
An aqueous solution contains 2.0 % NaCl by mass. (1) Calculate the molality (NOT molarity!) of the solution. (2) Calculate the mole fraction of the solution. I know how to solve both but the problem is missing one other compound/element. I know that molality is moles per kg of...
Tuesday, January 26, 2010 at 9:34am by .
Chemistry
moles glucose = grams/molar mass Solve for moles. m = #moles/L soln You know #moles from above and you know L soln. Solve for m. f.p. delta T = Kf*m, then solve for f.p. knowing normal f.p. is 0C. b.p. delta T = Kb*m, then solve for b.p. knowing normal b.p. is 100 C. mole ...
Saturday, January 15, 2011 at 10:26pm by DrBob222
Chemistry
See your other post on glucose.
Wednesday, March 20, 2013 at 1:53am by DrBob222
Health
Glucose enters most cells by what?
Wednesday, December 5, 2012 at 6:49pm by Allissa
biology
Compare isomers and sterioisomers of glucose?
Tuesday, August 28, 2012 at 9:29am by Rose
chemistry
The combustion of glucose is an exothermic reaction.
Saturday, June 11, 2011 at 2:50pm by DrBob222
science
Compare table salt with glucose.
Wednesday, April 6, 2011 at 8:02pm by unknown
science
How many ATP can I make from 3 glucose molecules
Sunday, July 25, 2010 at 4:58pm by sheshe
Biochemistry
How can I separate glucose and a triacylglycreol mixture? Thanks for any help ,,,,
Monday, December 1, 2008 at 6:12pm by Scott
Chemistry
Does anyone know how to separate triacylglyceride and glucose in the lab?
Saturday, November 29, 2008 at 3:16pm by John
organic
Explain why glucose undergoes mutarotation
Saturday, November 8, 2008 at 3:43pm by Jake
Bio
What happens to the oxygen atoms from glucose?
Monday, November 12, 2007 at 9:07am by Anonymous
Biochem
What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions? Condition: A cell-free yeast extract is placed in a solution that contains 3.50 × 102 mmol glucose, 0.30 mmol ADP, 0.30 mmol Pi, 0.60 mmol ATP, 0....
Wednesday, April 3, 2013 at 6:11pm by Mark
chemistry
A glucose solution contains 55.8g of glucose (C6H12O6) in 455g of water. Calculate the freezing poing and boiling point of the solution. (Assume a density of 1.00 g/ml for water. This what I did, I got moles of C6H12O6, 0.89 moles C6H12O6 then I got the mass of the solution ...
Friday, November 4, 2011 at 2:41pm by Monique
Chmistry
Sodium metal dissolves in liquid mercury to form a solution called a sodium amalgam. The densities of Na(s) and Hg(l) are 0.97 g/cm3 and 13.6 g/cm3, respectively. A sodium amalgam is made by dissolving 1.0 cm3 Na(s) in 20.0 cm3 Hg(l). Assume that the final volume of the ...
Tuesday, December 13, 2011 at 10:55am by bernan
Chemistry
Sodium metal dissolves in liquid mercury to form a solution called a sodium amalgam. The densities of Na(s) and Hg(l) are 0.97 g/cm3 and 13.6 g/cm3, respectively. A sodium amalgam is made by dissolving 1.0 cm3 Na(s) in 20.0 cm3 Hg(l). Assume that the final volume of the ...
Sunday, December 11, 2011 at 2:56am by bernan
Chemistry
Look up the freezing point of benzene, then delta T = f.p.=3.5 = Kf*m Solve for molality. molality = moles/kg solvent Solve for moles. moles acetic acid = grams acetic acid/molar mass acetic acid Solve for molar mass. You would expect to find 60 for the molar mass CH3COOH. You...
Friday, February 17, 2012 at 8:08pm by DrBob222
Chemistry
A molality is the number of moles of solute dissolved in one kilogram of solvent. molar mass for HCOOH = 2*1+12+2*16=46 (more accurate value = 46.03) A litre of the solution contains 23.6 moles, or 1085.6 g of the pure acid, and has a total mass of 1000*1.16=1160 g. The mass ...
Tuesday, December 7, 2010 at 3:31am by MathMate
P. Chemistry
delta T = Kf*molality 11 = Kf*m Calculate m molality = moles/kg solvent. I think we must assume 1 kg solvent although that won't be exactly right. Calculate (estimate) # moles. #moles + 55.5 for H2O = total moles. Calculate mole fraction water, Then vapor pressure H2O = ...
Sunday, March 7, 2010 at 10:53pm by DrBob222
Chemistry
What will be the vapor pressure at 25 degree C of a 30.0% (by mass) solution of glucose, C6H12O6 (a non-electrolyte-molar mass = 180 g/mol), in water? The vapor pressure of water at 25 degree C is 23.8 mm Hg. Psolvent = XsolventPosolvent. You will need to calculate the mol ...
Wednesday, January 31, 2007 at 8:48pm by AndrewN.
Chem 2
Convert 2 gallons ethylene glycol to mL then use density to calculate the mass. Convert 2 gallons H2O to mL and use density to calculate the mass. mols ethylene glycol = grams/molar mass molality of the soln then is moles ethylene glycol/kg H2O delta T = 1*Kb*molality. You can...
Saturday, July 14, 2012 at 4:47pm by DrBob222
chemistry
0.1 molality or m total ions of Na2SO4
Saturday, March 23, 2013 at 7:23pm by rich
Chemistry
I found molality of urea but I am not sure how to do after
Tuesday, February 26, 2013 at 8:31pm by K
Chemistry
molality x kg solvent is not your answer.
Saturday, September 8, 2012 at 5:08pm by DrBob222
chemistry
what is the weight of calcium acetate at 0.1,0.2,0.3,0.4,0.5 molality?
Tuesday, July 5, 2011 at 10:52pm by shilu
CHEMISTRY- molality
I call this a stoichiometry problem.
Wednesday, October 13, 2010 at 10:12pm by DrBob222
Molarity/molality
Thank you! I got the correct answer.
Friday, May 7, 2010 at 9:26pm by ChEm
Chemistry II
delta T = i*Kf*molality
Wednesday, September 16, 2009 at 2:54am by DrBob222
Chemisty
sorry my fault it is suppose to be molality
Thursday, February 7, 2008 at 9:37pm by Lauren
chemistry
Isn't delta T = Kb*m? Then 0.320 = (5.12oC/m)*m m = 0.320/5.12 = 0.0625 m molality = mols/kg so mols = molality*kg = 0.0625 mol/kg*0.015 kg = 9.375 x 10^-4 mols. mols = g/molar mass molar mass = g/mols = 0.500 g/9.375 x 10^-4 = 533.3
Thursday, April 3, 2008 at 4:11pm by DrBob222
biology
what does it mean to say that the ratio of oxygen to carbon in fat is smaller than that in carbohydrate? i know that the formula for glucose is c6h12o6. so when they say that the ratio of oxygen to carbon in fat is smaller, what exactly is it like? So the oxygen to carbon ...
Friday, October 1, 2010 at 8:39am by kusmaxe
biology
Try some of the following links for information: http://search.yahoo.com/search?fr=mcafee&p=why+is+glucose+converted+into+hexose+bisphosphate+in+glycolysis+%3F%3F+ Sra
Friday, October 28, 2011 at 3:30pm by SraJMcGin
chemistry
how many molecules are present in 1.2 mol of glucose, C6H12O6?
Wednesday, December 12, 2012 at 1:01pm by ellen
chemistry
0.0386mol glucose in 88.0ml of solution
Saturday, December 8, 2012 at 4:56pm by cynthia
Chemistry
how many atoms of oxygen are present in 30 g of glucose
Monday, May 14, 2012 at 4:57am by Susan
Chemistry
how many atoms of oxygen are present in 30 g of glucose
Thursday, May 10, 2012 at 1:42pm by Susan
Chemistry
which is more soluble in water: cyclohexane or glucose?
Monday, January 30, 2012 at 1:18am by Jeremy
Biology
What is the difference between beta and alpha glucose.
Wednesday, November 9, 2011 at 8:39am by Debe
Biology
What is combined in the chloroplast to make glucose?
Friday, May 6, 2011 at 2:13pm by Sean Micheals
Chemistry
explain different forms of polymerisation in glucose
Sunday, September 5, 2010 at 4:06am by sarah
Biology
Is the plasma membrane permeable to glucose or starch?
Tuesday, March 24, 2009 at 6:15pm by Nina
Chemistry
How would you then extract the glucose from the triacylglyceride? Heat?
Saturday, November 29, 2008 at 3:16pm by John
science
How are glucose molecules moved into a cell?
Wednesday, October 8, 2008 at 6:42pm by betsy
science
how are glucose molecules moved into a cell?
Wednesday, February 13, 2008 at 4:52pm by breana
Chemistry
Galactose and Fructose are called isomers of glucose. Why?
Thursday, October 11, 2007 at 11:51am by Jessica
Science
What type of transport supplies a cell with glucose?
Wednesday, October 3, 2007 at 8:34pm by Christopher
science
Starch is a polysaccharide. The subunit is glucose, a monosaccharide.
Sunday, September 2, 2007 at 6:17pm by DrBob222
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
AP Chem. 3
delta T = kb*molality You know delta T and Kb. Solve for m molality = moles unknown/kg solvent Solve for moles unknown. moles = grams/molar mass You have moles unknown and grams unknown, solve for molar mass of unknown.
Monday, January 30, 2012 at 2:35pm by DrBob222
Chemistry-Question 4
mols solute/kg solvent = molality You know molality, you know kg solvent, calculate mols solute. Then mols = grams/molar mass. You know mols from above, you know molar mass solute, calculate grams solute.
Tuesday, September 2, 2008 at 3:05pm by DrBob222
chemistry
what's the T Kb what would the molality be plugged in for the equation
Monday, May 13, 2013 at 11:53am by alice
Chemistry105
Is it m or M? It makes a difference. m is molality; M is molarity. What is chi?
Sunday, December 2, 2012 at 7:16pm by DrBob222
chemistry
what is the molality of a solvent that is 0.15 degree celcius
Sunday, November 25, 2012 at 10:39pm by lauren
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