Search: If 1.25 grams of water is enclosed in a 1.5 L container, will any liquid be present? If so, what mass of liquid

Number of results: 56,057

chem help asap
The definition of molarity is M = #mols/Liter of solution. If you want to do this by math (instead of reasoning), you first plug in 0.5 for M and 0.250 for L and calculate #moles. 0.5=moles/0.250 L moles NaCl = 0.5 x 0.250 = 0.125 moles. 1 mole NaCl = approximately 58.5 grams...
Thursday, May 28, 2009 at 10:34pm by DrBob222

science
114.0 g of water is heated using 67.0 W of power with perfect efficiency. Ho long will it take to raise the temperature of the water from 15 C to 25 C?
Wednesday, March 6, 2013 at 9:14pm by Bertrand. B

Physics
How much water at 65 C must be mixed with 600 gm of water at 25 C in a 55 gr can specific heat .1, if the temperature of the mixture is to be 31 C?
Wednesday, December 5, 2012 at 8:26pm by Gambatte

Chemistry
grams water in the sample is 0.6523-0.3423 = ?? %H2O = [mass water/mass sample] x 100 = ??
Tuesday, October 13, 2009 at 11:49pm by DrBob222

physics
A 1.41-kg aluminum pot contains 2.25 L of water. Both pot and water are initially at 17.5°C. How much heat must flow into the pot and the water to bring their temperature up to 92.7°C? Assume that the effect of water evaporation during the heating process can be ...
Friday, December 9, 2011 at 10:43am by maria

science
250 milliliters = 0.25 L; To make a 3.0 M NaOH solution from 6.0 M NaOH, you need equal parts of water and NaOH solution You need 0.25 Liters of the solution, so you need 1/2 * 0.25 = 125 milliliters 6.0 M NaOH, and 125 milliliters water
Thursday, November 1, 2012 at 2:15pm by Jennifer

chemistry
5. Meals-ready-to-eat (MREs) are military meals that can be heated on a flameless heater. The heat is produced by the following reaction: Mg(s) + 2H2O(l) --> Mg(OH)2(s) + H2(g) Calculate the number of grams of Mg needed for this reaction to release enough energy to ...
Tuesday, May 14, 2013 at 3:49pm by tra

AP Chemistry
12.5% by volume means 12.5 mL ethanol/100 mL of solution. Don't we need the density of the wine in order to calculate the mass of the 100 mL? We can estimate if we assume ethanol and water volumes add (and I KNOW they do not). 12.5 mL ethanol in (12.5 mL ethanol+ 87.5 mL ...
Sunday, November 14, 2010 at 11:56pm by DrBob222

Algebra 1
Marks pet needs to eat at least 18 grams of fiber but less than 25 grams of protein each day. Mark gives his dog Food A and Food B throughout the day. Food A has 2 grams of fiber and 3 grams of protein in each serving. Food B has 4 grams of fiber and 1 gram of protein for each...
Friday, January 13, 2012 at 4:23pm by D.D

Chemistry
A 62g piece of ice at 0 degrees celcius is added to a sample of water at 9 degrees celcius. All of the ice melts and the temperature of the water decreases to 0 degrees celcius. How many grams of water were in the sample
Sunday, February 17, 2013 at 11:57pm by Lisa

Chemistry
A 41 g piece of ice at 0.0 degree Celsius is added to a sample of water at 8.6 degree Celsius. All of the ice melts and the temperature of the water decreases to 0.0 degree Celsius. How many grams of water were in the sample?
Thursday, September 8, 2011 at 6:08pm by Jennifer

Science
A 44 g piece of ice at 0 degrees celsius is added to a sample of water at 7 degrees celsius. all of the ice melts and the temperature of the water decreases to 0 degrees celsius. How many grams of water were in the sample?
Friday, June 18, 2010 at 10:05pm by scott

chemistry
1A). Place an arrow where it belongs in the equation. Then balance it. 2. Convert grams you are given to moles. # moles = grams/molar mass. 3. Using the coefficients in the balanced equation, convert moles of what you were given to moles of water. 4. Convert moles water to ...
Thursday, January 7, 2010 at 9:59pm by DrBob222

Physical science
how many calories to change 100 grams of water at 100 degrees C. to 100 grams of steam at 100 degrees C.?
Sunday, May 1, 2011 at 6:49pm by Crystal

Physics 11
The heat lost by the hot water equals the heat gained by the tap water. The hot water cools 59 C and the tap water warms up by 14 C. 79*59*C =M*14*C The specific heat C cancels out. M = (59/14)*79 grams = 333 g = 0.333 kg I agree with your answer.
Monday, November 16, 2009 at 7:40pm by drwls

Chemistry
If 1500. of hard water contains 0.019 and 0.0070 , how many moles of are needed to replace these ions? If the sodium is added to the water softener in the form of NaCl , how many grams of sodium chloride are needed?
Tuesday, September 27, 2011 at 3:11pm by Sarah

chemistry
Most community water supplies have 0.50 ppm of chlorine added for purification. What mass of chlorine must be added to 134.0 L of water to achieve this level? anwser grams
Thursday, April 26, 2012 at 10:56pm by john

Chemistry- Drbob-help
I have placed the answer I got please help. A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 870mL ok 2. Calculate the...
Wednesday, February 9, 2011 at 11:31pm by DrBob222

Chemistry
A piece of metal weighing 20.32 grams is added to a flask with a volume of 24.5 cm3. It is found that 18.52 grams of water must be added to the metal to fill the flask. What is the density of the metal?
Monday, September 3, 2012 at 2:27am by Jane

Math
Let's use the "brute force" method. Start at the top with the most valuable combination and start adding. 25 + 25 + 25 = 75 25 + 25 + 10 = 65 25 + 25 + 5 = 55 25 + 25 + 1 = 51 25 + 10 + 10 = 45 25 + 10 + 5 = 40 25 + 10 + 1 = 36 10 + 10 + 10 = 30 10 + 10 + 5 = 25 ...
Sunday, January 9, 2011 at 11:07am by drwls

chemistry
Convert 55 g CO2 to grams C. Convert 30 g H2O to grams H. Calculate grams oxygen = 25- g C - g H. Convert grams to moles. moles C = g C/atomic mass C. moles H = g H/atomic mass H. moles O = g O/atomic mass O. Now you want to determine the ratio of these elements to each other ...
Friday, October 8, 2010 at 1:31pm by DrBob222

chemistry
how do I solve for: How many grams of water would be lost form 100.0grams of CuCl2 x 5H2O when the hydrated salt was heated at 1000degreesC for one hour in a crucible? What is the percent composition of water in the compound: Percentwater= 5*(2+16)/(5*18 + atomic mass Cu + 2*...
Friday, November 17, 2006 at 10:07am by digits

chemisrty
Q4) Suppose you prepare 950 mL of a solution by dissolving 100 grams of NaCl in 900 mL of water. Assuming the density of pure water to be 1 g/mL, answer the following questions with regards to this solution: a) What is the mass percent of water in this solution? b) What is ...
Monday, January 16, 2012 at 4:43pm by lyan

chemistry
How many grams of water would you add to 1.00 kg of 1.48 m CH3OH(aq) to reduce the molality to 1.00 m CH3OH. Use two sig figs. I get 4.8 * 10^2 grams and its not right. I want to put this up here again to see if there are any errors that could have possibly been made
Sunday, February 21, 2010 at 8:36pm by david

Chemistry
You want to prepare 750 mL of a 0.4M Na2S2O3 solution. You want how many mols? That's M x L = 0.40 M x 0.750 L = 0.30 mols. mols Na2S2O3 = grams Na2S2O3/molar mass g = mols x molar mass = 0.3 x molar mass Na2S2O3. Weigh out that many grams Na2S2O3, place into a 750 mL ...
Tuesday, September 25, 2012 at 2:50pm by DrBob222

language
Thank you for using the Jiskha Homework Help Forum. There are MANY words for water actually! mizu, yes but clear water = kireina mizu; citty water = siudo; cold water = tsumetai; , ohiya; drinking water = nomi mizu fresh water = atarashii mizu; hot water = oyu; ice water = ...
Friday, August 24, 2007 at 3:52am by SraJMcGin

physics
A U-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water. Both sides of the tube are open to the atmosphere. If h1 = 0.46 m and h2 = 0.25 m, what is the density of the liquid? on the left side of the tube is the liquid h2= 0.25 m...
Tuesday, April 10, 2012 at 4:14pm by Adam

chemistry
unknown element X combines with oxygen to form the compund XO2. If 44.0 grams of element X combines with 8.00 grams of oxygen, what is the atomic mass of element X? X + O2 ==> XO2 8.00 g x (1 mol O2/32 g O2) = 0.25 mol O2. 44.0 g element X must represent 0.25 mol ...
Sunday, April 29, 2007 at 6:15pm by alexa

Chemistry
In a mountainous location, the boiling point of pure water is found to be 95°C. How many grams of sodium chloride must be added to 9 kg of water to bring the boiling point back to 101°C? Assume that i = 2.
Sunday, January 27, 2013 at 2:59pm by flame

chemistry
How many kilojoules of heat is required to completely covert 60.0 grams of water at 32.0° C to steam at 100°C? For water: s = 4.179 J/g °C Hfusion = 6.01 kJ/mol Hvap = 40.7 kJ/mol
Monday, November 29, 2010 at 5:29pm by Kate

physics
a stone of mass 30 grams is placed in a measuring cylinder containing some water. the reading of the water level increases from 50cm cubic to 60cm cubic. what is the density of te stone?
Wednesday, September 29, 2010 at 11:29am by chelsea

Chemistry
A 230-gram sample of metal at 82 degrees centigrade is added to 632 grams of water at 14.4 degrees centigrade in an ideal calorimeter. The final temperature of the system (water and metal) is 22.8 degrees centigrade. What is the heat acapacity of the metal. The specific heat ...
Sunday, October 26, 2008 at 9:37pm by Trevor

chemistry
delta H = 8190 J/24.6 g Multiply by molar mass water to convert to J/mol. H2O(s) + heat ==> H2O(l) I have a problem with the last question. If ice is to be melted, it must absorb heat, not produce heat. The number you want is J/g (from #1) x #grams = 10,000. Solve for #...
Tuesday, November 1, 2011 at 6:32pm by DrBob222

chemistry
At 25 degrees celsius and 1.0 atm, 0.25g of a gas dissolves in 1.00L of water. What mass of the gas dissolves in 1.00 L of water at 25 degrees celsius and 3.0 atm?
Monday, March 31, 2008 at 8:32pm by Anonymous

physics
Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth : An oak barrel with a lid of area 0.25 m^2 is filled with water. Along, thin tube of cross-sectional area 5.5×10−5 m^2 is inserted into a hole at the ...
Sunday, June 12, 2011 at 5:54pm by Aaron

chemistry
25% w/w means 25 g NaCl/100 g soln. Change 25 g to moles. moles = grams/molar mass. Use mass = volume x density to determine the volume of the 100 g soln. Then M = moles/L
Monday, November 21, 2011 at 11:39am by DrBob222

Chemistry
In the lab I had a strip of magnesium that weighed 0.029 grams and I added 15 milliliters of 0.5 M hydrochloric acid into a flask and I never used any water during the lab. So I don't really understand where I would get the water vapor pressure.
Sunday, July 15, 2012 at 12:07am by Zach

Chemistry
The vapor pressure of water at 95C is normally 6.33.9 but decreased to 561.2mmHg upon addition of an unknown amount of NaOCl to 164.3g of water at this temp. How many grams of NaOCl was added assuming complete dissociation of the solute
Saturday, April 23, 2011 at 5:52pm by Jay

Chemistry
Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and Kf is equal to 1.86 C/m. * Use Tf = Kf*i*m
Friday, May 28, 2010 at 12:28am by Jaden

Chemistry - College
Convert 0.45 # hamburger to grams 0.45 lb x (453.6 g/lb)= ?? grams hamburger. ?? g hamburger x 3.71 kcal/g = xx kcal. I would convert that to kJoules. xx kcal x (4.184 kJ/kcal) = yy kJ. Then mass water x delta Hvap = yy kJ Solve for mass water. I get something a little over 1 ...
Wednesday, October 20, 2010 at 2:46pm by DrBob222

Chemistry
Concentrated sulfuric acid is 18.4 molar and has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar the solution has a density of 1.38 grams per milliliter. This concentration of H2SO4 is often used in lead storage batteries(like a car battery). 1....
Sunday, January 9, 2011 at 10:13pm by Kevin

chemistry
3.6 g of a hydrocarbon fuel is burned in a calorimeter that contains a 244 grams of water initally at 25.00 degrees C. After the combustion the temperature is 26.55 degrees C. How much heat is evolved per gram of fuel burned? The heat capacity of the calorimeter (hardware only...
Wednesday, October 26, 2011 at 10:04pm by Aubrey

physics
Heat will flow from the gold to the water until an equilbrium temperature T is reached. You will need the specific heats of gold (C1) and water (C2 = 1.00 kCal/kg C). M2*C2*(99 - T) = M1*C1*(T - 25) (99-T)/(T-25) = M1*C1/(M2*C2) Solve for T (the final temperature). m1 is the ...
Tuesday, February 5, 2008 at 3:21pm by drwls

Physics Heat
1) While Laurie is boiling water to cook spaghetti, the phone rings, and all 1.5 kg of water boils away during her conversation.If the water was initially at 15℃, how much heat must have been gained for all of it to turn into a water vapor? 2)By January, the 3.0 kg ...
Wednesday, March 20, 2013 at 7:04pm by Isis

Math
Jennifer plans to fence a rectangular area around her rectangular swimming pool. The total area enclosed by the fence, including the pool, should be 5 times the area of the pool alone. The pool is 20 feet by 17 feet. A.)What is the total area enclosed by the fence? B.) fencing...
Monday, November 19, 2012 at 8:46pm by Vic

physicssss
Six grams of water changes from liquid to vapor at a pressure of one atmosphere. In the process, the volume changes from 1.3 cm3 to 2393 cm3. The latent heat of vaporization of water is 2.26 × 106 J/kg. Find the work done. Answer in units of J Find the increase in ...
Sunday, January 13, 2013 at 1:30pm by physicshelp

math
dy/dx = slope = [ (x+4)(2x) - x^2 ] /(x+4)^2 = ( x^2 + 8 x ] / (x+4)^2 at x = 1 this slope is = 9/25 so that is m goes through (1, 1/5) 1/5 = (9/25)(1) + b 5/25 = 9/25 + b b = -4/25 so y = 9 x/25 - 4/25 or 25 y = 9 x - 4
Friday, March 8, 2013 at 10:27pm by Damon

Chemistry
I will do an experiment that includes 4 grams of aluminum hydroxide and iron (III) oxide mixture, where 75% of it is Al(OH)3, and 15 ml of water and 25 ml of 2M KOH will be added and then boiled so that the Al(OH)3 dissolves. It will be filtered and then sulfuric acid will be ...
Sunday, March 25, 2012 at 3:28pm by Tiffany

11th grade
The standard way is to figure the moles you need in the new volume, subtract the moles you have (volume*Molarity), then add the grams of solute to the solution, add solvent to the specified volume, stir, label, and store appropriately. Here is my favorite way. Example1. You ...
Friday, February 19, 2010 at 5:13pm by bobpursley

Science
Salim added 1 g of salt to each of four beakers filled with water. He stirred the water at different speeds, and recorded how long it took for the salt to dissolved. Stirring Time (sec) No stirring 25 Slow stirring 18 Medium stirring 10 Fast stirring 6 Which conclusion should ...
Tuesday, October 25, 2011 at 10:41pm by Mary

Chemistry
H occurs as a diatomic molecule (as does oxygen) so the equation should be 2H2 + O2 ==> 2H2O (10 moles H2 will produce 10 moles H2O --ONLY IF there is sufficient oxygen present and that will be 5 moles oxygen needed for 10 moles H2). 1 mole H2O has a molar mass of 18 ...
Saturday, January 15, 2011 at 8:09pm by DrBob222

physics
Draw the vector diagram. Draw the N vector. THen, from the top of the N vector, sketch the flow of water vector. Now, the resultant is from the bottom of the N vector to the tip of the water vector. Using the law of cosines: R^2=B^2 + W^2 -2BWcos60 and the direction, from the ...
Sunday, September 4, 2011 at 9:51am by bobpursley

Chemistry
Many homes in rural America are heated by propane gas, a compound that contains only carbon and hydrogen. Complete combustion of of a sample of propane produced 2.641 grams of carbon dioxide and 1.422 grams of water as the only products. Find the empirical formula.
Monday, August 16, 2010 at 2:32am by Anonymous

chemistry
Sucrose is commonly known as table sugar. The formula is C12H22O11. You burn 7.29 grams of sucrose in a bomb calorimeter. The temperature of the calorimeter and the water in it rises from 23.24 degrees celsius to 29.77 degrees celsius. The bomb's heat capacity had been ...
Sunday, April 20, 2008 at 11:46am by billy bob j

Chemistry
How much ice in grams would have to melt to lower the temperature of 58.2 g of water from 55.0 degrees C to 0 degrees C? Assume the density of water is 1.0 g/mL Any advice on how to tackle this problem would be appreciated. Thanks
Tuesday, April 3, 2012 at 9:33pm by Alex

chemistry homework help!!
if you have 380.0mL of water at 25.00 degrees Celsius and add 140mL of water at 95.00 degrees Celsius, what is the final temperature of the mixture? Use 1.00 g/mol as the density of water.
Sunday, February 26, 2012 at 12:57am by danielle

Chemistry (stoichiometry)
18.5 grams of calcium chloride reacts with 25.7 grams of sodium phosphate and produces calcium phosphate and sodium chloride. What is the limiting reactant? (show work)
Wednesday, March 7, 2012 at 8:43am by Hannah

science
Try some of the following inks: http://search.yahoo.com/search?fr=mcafee&p=how+to+measure+out+25+grams+of+sodium+chloride Sra
Thursday, June 2, 2011 at 10:59pm by SraJMcGin

Chemistry
1.25 pounds x 453.6 g/pound = ?grams ?grams x 10.85 kcal/g = x kcal x kcal x 1000 cal/kcal = 120,000 g H2O x specific heat H2O (cal/g) x (Tfinal-Tinitial)
Friday, March 22, 2013 at 10:56pm by DrBob222

Chemistry
Ammonium sulfate reacts with a solution of sodium hydroxide to produce sodium sulfate, ammonia gas and water. Calculate the yield in grams of ammonia gas that would form; and the amount of excess reagent in grams that would be left in the flask, after 9.92 grams of ammonium ...
Sunday, April 17, 2011 at 8:06pm by John

math
1 1/4 gallons need to be added. If the water level has dropped to 4/5 of the 6 1/4 gallons that it can hold, then that means that 1/5 of the aquariums capacity is gone. So you have to multiply 6 1/4 X 1/5. Change 6 1/4 to an improper fraction, 25/4. Then multiply that by 1/5. ...
Wednesday, October 20, 2010 at 1:21am by Anonymous

Chemistry
I forgot to post this one with the other What is the freezing point of a solution containing 4.0 Mol of sodium chloride in 1200 grams of water? (kf for water is 1.86 C/M) I don't really want the whole answer, just where I would plug in the numbers. I keep forgetting what ...
Wednesday, April 27, 2011 at 11:55pm by Laura

Physics
The heat of fusion of water is 80 cal/g. When 25 g of ice at 0ºC is placed in the contents of a 12 oz can of Coke (≈350 g) at 25ºC, what is the final temperature of the beverage?
Saturday, February 4, 2012 at 12:01pm by Hannah

chemistry
1.calculate d nos of molecules and atoms in following cases: (a).0.25 moles of water' b.32 gramms of SO2?c) 0.45 litres of hydrogen measured to 25·c and 0.9 atm.
Wednesday, June 15, 2011 at 1:42pm by tilo

Chemistry
At 50 degrees, 100 grams of water is saturated with cerium (III) sulfate. How many grams of cerium (III) sulfate must be added to saturate the solution at zero degrees celsius?
Wednesday, April 18, 2012 at 5:14pm by Sarah

Chemistry
How many grams of BaCO3 will dissolve in 3.0 L of water containing a Ba+2 concentration of 0.5 M (Ksp= 5.1E-9) My work: BaCO3 <-> Ba+ + CO3- i 0.5 M c -s +s +s e 0.5 +s +s (s)(0.5+s)= 5.1E-9 s= 1.0E-9mol/L x 3.0 L x 197.336 g/L= 5.92E-6 grams of BaCO3 dissolved ^...
Saturday, May 14, 2011 at 2:13am by Kelly

CHEMISTRY HELP NEEDED A.S.A.P
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...
Thursday, April 22, 2010 at 2:38am by Frank

Chemistry
A 50g sample of metal was heated to 100 degrees Celsius and then dropped into a beaker containing 50g of water at 25 degrees Celsius. If the specific heat of the metal is .25 cal/g degrees Celsius, what is the final temperature of the water? A. 27 B. 40 C. 60 D. 86 (units are ...
Saturday, July 23, 2011 at 2:03pm by Monique

chemistry
Convert 12 ounces to grams. (mass ice x 330 J/g) + [(mass water x specific heat water x (Tfinal-Tinitial)] = 0 Solve for mass ice.
Wednesday, September 15, 2010 at 5:00pm by DrBob222

Chemistry
How much boiling water would you need in order to raise the bath to body temperature (about 37)? Assume that no heat is transferred to the surrounding environment. Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25kg of room-...
Thursday, November 4, 2010 at 8:35pm by Bella

Science
Salim added 1 g of salt to each of four beakers filled with water. He stirred the water at different speeds, and recorded how long it took for the salt to dissolved. Stirring - Time (sec) No stirring - 25 Slow stirring - 18 Medium stirring - 10 Fast stirring - 6 Which ...
Wednesday, October 26, 2011 at 12:12am by Mary Helpppppp

Chemistry
So how many grams and moles of water will I use? I know water is missing compound and for the molality calculation, how many will I use? 1 gram and then covert that to kg? How many moles will I use? One mole?
Tuesday, January 26, 2010 at 9:34am by .

chemistry
You must always have a balanced equation and you have that. Convert 50 g methanol to moles. moles = grams/molar mass Using the coefficients in the balanced equation, convert moles methanol to moles H2O. Now convert moles H2O to grams. g = moles x molar mass. This is the ...
Monday, March 22, 2010 at 6:30pm by DrBob222

CHEMISTRY HELP DESPERATELY NEEDDED!!!
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...
Wednesday, April 21, 2010 at 11:24pm by Frank

Hudson
In a calorimetric experiment, 6.48 grams of lithium hydroxide was dissolved in water. The temp of the calorimeter rose from 25 celcius to 36.66 celcius. What is the molar change in enthalpy for this procces? LiOH(s) -> Li(aq) + OH (aq) (the heat capacity of the ...
Monday, October 8, 2012 at 6:09pm by k-dawg

Science
Humidity is the amount of water vapor in the air at a given time. At warm temperatures, air can hold more moisture than it can at cold temperatures. Relative humidity is the amount of vapor the air is holding expressed as a percentage of the amount the air is capable of ...
Friday, July 18, 2008 at 11:29pm by tiffany

Chemistry
how many moles is that? n=PV/RT solve that. Then, each mole of water decomposes to 1/2 mole of oxygen gas. so whatever moles of O2 you found, multipy by two, that is the moles of water, convert that to grams.
Wednesday, July 13, 2011 at 9:27pm by bobpursley

college chemistry!! need help now!!
How many moles of water per breath? n=PV/RT P=vaporpressure V is volume of breath T is temp. Now, knowing moles per breath, convert that to one hour. Finally convert moles water to grams water.
Sunday, October 19, 2008 at 9:51pm by bobpursley

chemistry
You drop a hot copper penny (500 degrees celsius) that has a mass of 4.5 grams into a glass of cold water (6.0 degrees celsius) with a volume of 120 mL. The water heats up to 7.7 degrees celsius. Find the heat absorbed by the water, then determine the specific heat of copper. ...
Sunday, April 20, 2008 at 11:33am by billy bob j

Chemistry
2H2(g) + O2(g) ==> 2H2O(l) 10 moles H2 will combine with 5 moles of O2 to produce 10 moles liquid water. All of that comes from the equation. How many grams will 10 moles water be? One mole is 18.015 g; therefore, 10 moles must be 180.15 g. If the density of the liquid ...
Monday, May 3, 2010 at 11:19pm by DrBob222

CHEMISTRY HELP STILL NEEDED PLEASE!!!
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of...
Thursday, April 22, 2010 at 12:52am by Frank

Chemistry
Hard water contains Ca ,Mg ,Fe and , which interfere with the action of soap and leave an insoluble coating on the insides of containers and pipes when heated. Water softeners replace these ions with Na. If 1100. L of hard water contains 0.021 M of Ca and 0.0060 M of Mg , how...
Tuesday, September 27, 2011 at 3:11pm by Brennan

Chemistry
Hard water contains Ca ,Mg ,Fe and , which interfere with the action of soap and leave an insoluble coating on the insides of containers and pipes when heated. Water softeners replace these ions with Na. If 1100. of hard water contains 0.021 M of Ca and 0.0060 M of Mg , how ...
Tuesday, September 27, 2011 at 3:11pm by Brennan

thermochemistry
A 12.48g sample of an unknown metal, heated to 99'c was then plunged into 50mL of 25'c water. The temperature of the water rose to 28.1'c. The specific heat of water is 4.184J/g. 1. How many joules of energy did the water absorb? 2. How many joules of energy did ...
Sunday, November 23, 2008 at 10:33pm by nichole

physics
Suppose you mix 75 g of water at 15 °C with 25 g of water at 75 °C. Predict the final temperature
Wednesday, February 8, 2012 at 11:59pm by Anonymous

chem
q = mass water x specific heat water x delta T. Solve for delta T. Add 25 if you want to know the final T.
Wednesday, September 14, 2011 at 6:21pm by DrBob222

physics
first do the stopping problem d = Vi t + .5 a t^2 d = 25 t + .5 a t^2 50 = 25 t + .5 a t^2 v = Vi + a t 0 = 25 + at a t = -25 a = -25/t combine 50 = 25 t - .5(25t) 50 = .5 (25 t) t = 4 seconds to stop after applying brakes a = -25/4 while stopping Now do the problem for the ...
Thursday, January 20, 2011 at 1:53am by Damon

Chemistry
A sample of iron was heated to 161.0°C, then placed into 338 g of water at 21.6°C. The temperature of the water rose to 26.9°C. How many grams of iron were in the sample? Specific heat for Iron is 0.473.
Wednesday, May 11, 2011 at 3:47pm by teena

Chemistry
.....In how much water? Technically, it isn't how much water but how much solution. moles NaCl = grams/molar mass M = moles/L soln.
Monday, February 20, 2012 at 11:18pm by DrBob222

chemistry
Write the balanced equation. 2HCl ==> H2 + Cl2 Convert 25 g HCl to moles. #moles = grams/molar mass. Using the coefficients in the balanced equation, convert moles HCl to moles Cl2. Convert moles Cl2 to grams. # grams = moles x molar mass. This # grams is the ...
Sunday, September 6, 2009 at 9:14pm by DrBob222

Chemistry
2KI + Pb(NO3)2 ==>2KNO3 + PbI2 You know the actual yield was 25.0 grams. Since it was 78.1% yield, then %yield = [(actual yield/theoreticalyield)]*(100 = 78.1. Substitute 25.0 for actual yield and calculate theoretical yield. Convert to moles PbI2, then use the ...
Wednesday, June 10, 2009 at 3:54pm by DrBob222

Chem
q = mass water x specific heat water x delta T. q = 445,000 joules. delta T = 100-25.
Tuesday, May 18, 2010 at 11:05pm by DrBob222

Science 6TH Grade
Salim added 1 g of salt to each of four beakers filled with water. He stirred the water at different speeds, and recorded how long it took for the salt to dissolved. Stirring - Time (sec) No stirring - 25 Slow stirring - 18 Medium stirring - 10 Fast stirring - 6 Which ...
Wednesday, October 26, 2011 at 12:59am by Mary PLEASEEEEE

physics
The increased displacement of water, nultiplied by the weight of that water, equals the buoyancy force. The increased displacement volume is 6.2*7.1*0.0602 = 2.65 m^3 The weight of that amount of displaced water is (density)*(water volume)*g = 1000*2.65*9.8 = 25,970 N That ...
Wednesday, December 19, 2012 at 11:53pm by drwls

chemistry
an original sample of K-40 has a mass of 25.00 grams. After 3.9x 10 to the ninth years, 3.125 grams of the original sample remains unchanged. What is the half-life ok K-40 in minutes? Is it 6.8328 x 10 to the 14th
Monday, January 16, 2012 at 5:35pm by micky

chemistry
tell the taste of these types of water well water mineral water fresh water tap water earated water?
Saturday, May 14, 2011 at 4:06pm by saim

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