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April 2, 2015

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Number of results: 7,279

Chemistry
7 grams of chloride was dissolved in water. 20 ml of lead(II)nitrate was used to completely precipitate all chloride (assume atomic mass of 35g/mol). What is the molarity of the Lead(II) Nitrate solution.
November 12, 2012 by Luke

Chemistry
7 grams of chloride was dissolved in water. 20 ml of lead(II)nitrate was used to completely precipitate all chloride (assume atomic mass of 35g/mol). What is the molarity of the Lead(II) Nitrate solution.
November 12, 2012 by Luke

Math
A 15-g sample of radioactive iodine decays in such a way that the mass remaining after t days is given by m(t) = 15e^(−0.051t), where m(t) is measured in grams. After how many days is there only 3 g remaining?
April 22, 2013 by Zach

chemistry
Solud iron and steam react at high temperatures to form iron(vi) peroxide and hydrogen gas. How much solid iron is needed to obtained 405 grams of iron(vi) peroxide, with a 84.2% yield?
September 16, 2013 by Junior

chemistry
Solud iron and steam react at high temperatures to form iron(vi) peroxide and hydrogen gas. How much solid iron is needed to obtained 405 grams of iron(vi) peroxide, with a 84.2% yield?
September 16, 2013 by Junior

chemistry
The Henry's law constant for CO2 at 20C is 3.7*10^-2 M/atm. What mass of CO2 (in grams) is present in 355 mL of soda drink if the pressure of CO2 in the can is 2.5 atmospheres at 20C? (Assume the solubility of CO2 in the soda is the same as water)
March 17, 2014 by Ellen

Chemistry
If 25.00 mL of 6.00 M HCl is transferred by pipet into a volumetric flask and diluted to 5.00 L, what is the molarity of the diluted HCl? a) 0.75 M b) 0.055 M c) 1.20 x 103 M d) 48.0 M e) 0.0300 M grams of solute/molar mass of solute/liters of solution?
November 20, 2014 by Rebecca

chemistry urgent
calculate the number of joules of heat required to change 85.0 grams of water at 25oC to steam at 10oC (heat of vaporization of water = 2260 j/g and specific heat of water = 4.18 j/g oC)
November 30, 2010 by Lynn

Chem
Can you show me step by step how to do the following problems? How many grams of KI are in 25.0 mL of a 3.0 % (m/v) KI solution? How many milliliters of a 2.5 M MgCl2 solution contain 17.5 g MgCl2?
March 29, 2011 by Kariann

chemistry
A 141-mg sample was placed on a watch glass that weighed 9.203 g. What is the weight of the watch glass and sample in grams?
January 31, 2012 by eric

chemistry
A 141-mg sample was placed on a watch glass that weighed 9.203 g. What is the weight of the watch glass and sample in grams?
January 31, 2012 by eric

chemistry
A 141-mg sample was placed on a watch glass that weighed 9.203 g. What is the weight if the watch glass and sample in grams?
February 2, 2012 by george

Chemistry
13.75 g of iron (III) nitrate react with an excess of ammonium sulfide, how many grams of iron (III) sulfide are produced
July 8, 2012 by Abby Walker

chemistry
If 13.75 g of Iron (III) nitrate react with an excess of ammonium sulfide, how many grams of iron(III) sulfide are produced?
July 3, 2013 by Adelle

Chem
Copper(II) fluoride contains 37.42% F by mass. Use this % to calculate the mass of fluorine in grams contained 28.5 g of copper (ii) fluoride
October 16, 2013 by Cindy

Chemistry
A sample of .234g of carbon is placed in a closed stainless steel bomb with .502g of of oxygen gas. The mixture is ignited giving of carbon dioxide. How many grams of carbon dioxide should be obtained upon combustion?
February 21, 2010 by Ben

chemistry
Determine the concentration at equilibrium if you start with 2.3 grams of Hydrogen and 200grams of Iodine in a 2.3 liter container. If you now add an extra .25M of HI after equilibrium, calculate Qc. Recalculate now what the concentrations should be at equilibrium. H2(g)+I2(g...
March 8, 2011 by regina

Chemistry
An unknown compound contains carbon, hydrogen, and oxygen. When burned, a 2.000 gram sample of this compound releases 3.451 g of carbon dioxide and 1.059 grams of water. What is the empirical formula of this compound? Thank you very much.
October 17, 2011 by Mom

chem
The complete combustion of octane, C8H18, the main component of gasoline, proceeds as follows. 2 C8H18(l) + 25 O2(g) 16 CO2(g) + 18 H2O(g) Octane has a density of 0.692 g/mL at 20C. How many grams of O2 are required to burn 26.5 gal of C8H18? i got 1.22e5 but it is wrong
October 6, 2012 by rebekah

Science
What is the mass in grams of 24.32 moles of CaCO3? So far I got: 24.32mol CaCO3 x 100.09gCaCO3 / 1mol CaCO3 = I am not sure if this is correct, because I got a really big number and I feel like I am missing something in the question.
March 2, 2015 by Anonymous

MATH
I have about 30 questions of this, so I need to understand the process. Please make it as detailed as possible! Thank you! Q: To reduce 32 grams of a 25% solution of antiseptic to a 10% solution, how much distilled water should a pharmacist add? A: Equation: _____ Answer is: ...
July 21, 2008 by LILY

chemistry
Calculate the volume of fuel needed for a flight if the jet fuel has a density of 0.803kg/L.First use dimensional analysis to convert liter to grams.Then substract to find how many kilograms need to be added.then convert this mass into liters
September 9, 2014 by treasa

Salford
How to prepare 500ml of 7% Question 6 You need to make 500mls of a 7% bovine serum albumin solution. What mass, in grams, do you need to add? Perform the calculation then type in the correct answer to 1dp. Do not add units or additional spaces. 10 points
October 19, 2014 by Danielle

chemistry
How many moles of iron is 67.9 g of Fe? 1.22 moles Fe? How many grams of iron is 6.57 10-2 mol Fe? 3.66 g Fe
February 5, 2012 by kr

chemistry
how many grams of lithium bromide are in 0.79 mol.of lithium bromide?
February 3, 2013 by Anonymous

chemistry
Suppose the following: HO-C(H2)-C(H2)-OH + 2 HI --> I-C(H2)-C(H2)-I + water How many mL of the first compound* are needed to react with 9.3 grams of HI? (The density of the first compound is A = 1.11 g/mL) *by first compound, i mean HO-C(H2)-C(H2)-OH
September 2, 2011 by kc

math
A cube of wood measures 5 centimeters on a side and weighs 19 grams. What is the density of the cube of wood? Will the cube of wood float in water?
January 28, 2015 by Evangeline

Chemistry
How do I balance this equation. When 11.7 grmas of iron and 212.7 grams of chlorine gas completely react, iron (III)chloride, FeCl3 is formed. Balance the equation. Could someone please be kind enough to help me with this?
July 10, 2008 by PP

physics
A bat hits a moving baseball. If the bat delivers a net eastward impulse of 0.7 N-s and the ball starts with an initial horizontal velocity of 3.8 m/s to the west and leaves with a 5.2 m/s velocity to the east, what is the mass of the ball (in grams)?
July 2, 2008 by Elisa

Chemistry
When 34.5 L ammonia and 39.5 L oxygen gas at STP burn, nitrogen monoxide and water are produced. After the products return to STP, how many grams of nitrogen monoxide are present? 4NH3+5O2->4NO+6H2O
October 13, 2008 by Niki

Chemistry
Consider the following chemical equation. Na3PO4(aq) + Ca(OH)2(aq) → Ca3(PO4)2(s) + NaOH(aq) How many grams of calcium hydroxide must react to give 2.81 g of Ca3(PO4)2? please explain step by step
November 2, 2010 by Anonymous

chemistry
Calcium carbonate reacts with hydrochloric acid according to the following reaction: CaCO3 (s) + 2 HCl (aq) --> CaCl2 (aq) + H2O (l) + CO2 (g) How many grams of calcium carbonate would be required to neutralize 50.0 cm3 of 8.00 M HCl?
November 7, 2010 by Christina

biochem
If I am given a solid chemical form of both the acid and the base, how do I determine how many grams of each I need to make 1L of a 25mM Tris-HCl buffer with acid concentration of 18.94mM, and base concentration of 6.06mM?
February 17, 2011 by Jenny

chemistry
What would be the mass of a bag of anhydrous magnesium sulfate, MgSO4, if it contained the same amount of magnesium as a 1.00kg bag of Epsom salts, MgSO4 x 7H2O? Give your answer in grams. please help
April 11, 2011 by Jess

chemistry
Zinc metal reacts with hydrochloric acid to produce hydrogen gas according to the equation below. What volume of hydrogen at STP is released when 15.1 grams of zinc react at STP? Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g)
June 9, 2011 by katydid

statistics
Determine the probability that a sample of 49 boxes will have a mean weight below 365grams. past records show that the population mean is 368 grams and the population standard deviation is 7. the probability will be between
November 30, 2011 by wanda

homework help please! chemistry 111
the specific heat of a certain type of metal is 0.128 J(grams per Celsius). What is the final temperature if 305J of heat is added to 74.8g of this metal initially at 20.0 degrees Celsius?
February 26, 2012 by danielle

Chemistry
a solid mixture is 3.00 grams and 65.0% NiCO3. How much nickel carbonate was lost if the sample was dissolved in 20.0 mL of water and washed with an additional 50.0 mL of water? I just don't know how to set up the problem..I don't need it solved, just set up :)
September 26, 2012 by KR1108

Chem Hmwrk
Iodine can be prepared by bubbling chlorine gas through an aqueous solution of sodium iodide: 2NaI(aq) + Cl2(g) → I2(s) + 2NaCl(aq) How many grams of sodium iodide are required to produce 98 g of iodine?
October 11, 2012 by Jon

science
A simple pendulum of length 1 metre has a bob of mass 100 grams.It is displaced through an angle 60 degree and then released.Calculate the speed of the bob when the pendulum passes through the mean position.
February 17, 2013 by Surajit Sanyal

chemistry
A 6.25 gram sample of copper(II) chloride hydrate was heated until all the water was liberated. The residue massed 4.45 grams. How many water molecules are present for every formula unit of copper(II) chloride?
September 24, 2013 by Peytreshia

chemistry
Suppose 1.2x10^3 kg of C is mixed with 2.4x10^5g oxygen gas and carbon dioxide forms. 1. write the reaction and balance 2.which reactant is the limiting reagent and which reactant is in excess 3. How many grams of carbon dioxide will be formed.
September 27, 2014 by frank

chemistry
The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. How many grams of sucrose are needed to make 655 mL of a 36.0% (w/v) sucrose solution?
November 17, 2014 by jackson

chemistry
A 12.42 gram sample of a mixture of NaCl and CaCl2 is dissolved in water and all the chloride is precipitated as AgCl. If the AgCl precipitate has a mass of 31.70 grams. How do I find the mass percentage of each component in the original mixture?
January 20, 2015 by Anonymous

chem
For the reaction shown, calculate how many grams of oxygen form when each quantity of reactant completely reacts. 2HgO(s)2Hg(l)+O 2 (g) 2\;{\rm{HgO}}\left( s \right)\; \rightarrow \;2\;{\rm{Hg}}\left( l \right) + {\rm{O}}_2 \left(1.40 kgHgO g \right)
November 20, 2014 by Masey

Science (urgent)
I have 2 biology questions I really need help with, they are due tommorow and I don't know if I'm right. 1)As an energy carrier, ATP differs from NADPH in that: a)ATP carries less energy than NADPH. b)ATP transfers energy through redox reactions whereas NADPH uses ...
November 1, 2011 by Jake

Chemistry
I need help working the problems, I dont know how I got the right answers Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine (c) Moles of solute in 145....
September 28, 2009 by Emily

Chemistry
I need help working the problems, I dont know how I got the right answers Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine (c) Moles of solute in 145....
September 29, 2009 by Emily

chemistry
2. Zinc metal reacts with HCL similarly to magnesium: Zn(s) + 2HCL(aq) = ZnCl2(aq) + H2(g). the H2 gas produced was collected over water at 25 degrees Celsius and had a volume of 7.80L at 0.980 atm. How many grams of Zn were consumed in the reaction? (Vapor pressure of water ...
May 2, 2012 by preshi

Science help
1. Which of the following can be expected to occur as climate change continues on Earth? decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding *** 2. Which piece of childrens playground equipment could...
November 14, 2014 by dddd47906

CHEM
A scientist wants to make a solution of tribasic sodium phosphate,Na3PO4 , for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 575mL of a solution that has a concentration of Na^+ ions of 1.40 M? Answer: mass of Na3PO4 = _____ How is this question ...
October 15, 2007 by K

college
if a sample of the radioactive nuclide 139cs has an activity of 0.0730 ci, what is the instantaneous rate of decomposition of 139cs in terms of grams per second? the mass of 139cs is 138.9134 amu. 1 ci 3.700 1010 disintegrations/ s, 1 amu 1.66054 1024 g
May 3, 2010 by Anonymous

Chem
If a sample of the radioactive nuclide 139Cs has an activity of 0.0730 Ci, what is the instantaneous rate of decomposition of 139Cs in terms of grams per second? The mass of 139Cs is 138.9134 amu. (1 Ci = 3.700 1010 disintegrations/s, 1 amu = 1.66054 1024 g)
May 3, 2010 by Alicea

Chemistry
If 150.0 g of butane (C4H10) gas are burned, how many grams of carbon dioxide gas will be produced? Report your answer to the nearest whole number and do not include units in your answer. Do not use scientific notation for your answer. This is a stoichiometry problem.
July 8, 2012 by Abby Walker

physics
The velocity of a ball changes from 8, −5, 0 m/s to 7.88, −5.28, 0 m/s in 0.04 s, due to the gravitational attraction of the Earth and to air resistance. The mass of the ball is 140 grams. I calculated the acceleration and got <-3,-7,0> what is the ...
June 28, 2014 by sam

chemistry
For the formation of ammonia, the equilibrium constant is known to be 5.2 10−5 at 25◦C. After analysis, it is determined that [N2] = 3.1 M and [H2] = 0.8 M, both at equilibrium. How many grams of ammonia are in the 10 L reaction vessel at equilibium? Use the ...
January 11, 2015 by Kira

chemistry
the recommended daily allowance of calcium is 1.2 g. calcium carbonate contains 12.0 % calcium by mass. how many grams of calcium carbonate are needed to provide the rda of calcium
January 23, 2012 by Anonymous

chemistry
C3H8 (g) + 5O2 (g) <-----> 3CO2 + 4HOH If such an oxidation is carried out on a gaseous mixture prepared by mixing 6.1 grams of propane and 11.0 L of oxygen measured at 1.0atm and 150 degrees celcius, what will be the total final volume under the same conditions of ...
January 2, 2012 by mackenzie

math
how do you convert kg to g A kilogram (kg) is 1,000 grams (g). To convert kg to g, divide the kg by 1,000. Example: 5,000 kg = 5 g.
August 20, 2007 by Anonymous

Physics
the weight of an object changed by =25.0% the object's final weight was 2.5 grams. What is it's inital weight
March 27, 2011 by Kia

isu
The liquid bromoethane has a density of 1.46 g/mL at 20 C. If a sample of this liquid at 20 C has a volume of 59.9 mL, how many grams of liquid are there in the sample
September 1, 2014 by adi

Chemistry
An aqueous KNO3 solution is made using 72.5 grams of KNO3 diluted to a total solution volume of 2.00 liters. If the molarity of the solution is .359 M and the molality of the solution is .354, what is the mass percent of the solution?
February 19, 2012 by Adam

Chemistry
A sample of solid monoprotic acid with molar mass equal to 137.9 g/mol was titrated with 0.1879 M sodium hydroxide solution. Calculate the mass in grams of acid to be used if the volume of NaOH to be used is 25 mL.
October 8, 2007 by Raj

chem
Elemental Sulfur can be formed through the combustion of Hydrogen Sulfide (found in Methane gas) give in equation H2S+O--->S + H2 4 tell how much sulfur is made from 250 grams of methane 2 H2S + O2---->2S +2 H2O s=32
February 9, 2010 by nycole

chemistry
How much heat in kilojoules is evolved in converting 1.00 mol of steam at 145 Celsius to ice at -50 Celsius? Please, all particular steps and conversions between mole and grams of steam, H2O and ice. Thanks!
June 23, 2010 by nano

Chemistry
AgNO3 solutions are often used to plate silver onto other metals. What is the maximum amount of silver in grams that can be plated out of 3.8 L of an AgNO3 solution containing 3.2% Ag by mass? (Assume that the density of the solution is 1.02 g/mL.)
November 30, 2010 by Kelsey G

Chemistry
How much CuSO4.5H20 would you need to prepare 6 grams of copper ammine complex, [Cu(NH3)]SO4.H20? There is only 1 ammonia molecule in the copper ammine complex. please answer asap, thanks!
March 27, 2012 by Melanie

Chemistry
How many milliliters of glacial acetic acid (17.3 M) would you need to titrate an aqueous solution of 100 grams sodium acetate (MW = 82.0 g mol-1) to get a final pH of 5.00 and a final volume of 1.00 liter? The pK for acetic acid is 4.76. Show your work.
September 10, 2012 by Trey

ap chemistry
3.5 g of a hydrocarbon fuel is burned in a ves- sel that contains 250. grams of water initially at 25.00 C. After the combustion, the temper- ature of the water is 26.55 C. How much heat is evolved per gram of fuel burned?
October 31, 2012 by cheri

GEneral Chemistry
the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density When I look at this i know that 99pm= 9.9e-7 and to get volume v=(3/4) or 1.33 (3/4)*3.14- pi *r^3 When I get to this point I do: 1.33*3.14= 4.1762*9.9e-7= 4.1e-6pm convert 4.1e-6pm ...
February 6, 2013 by melissa- HELP!!!

SP HS High school
A simple pendulum of length 1 metre has a bob of mass 100 grams.It is displaced through an angle 60 degree and then released.Calculate the speed of the bob when the pendulum passes through the mean position.
February 17, 2013 by Surajit Sanyal

Chemistry
In the explosion of a hydrogen-filled balloon, 0.80g of hydrogen reacted with 6.4g of oxygen. How many grams of water vapor are formed? (Water vapor is the only product.) Express your answer using two significant figures.
September 7, 2013 by Anonymous

Chemistry
SHOW WORK A cylinder contains 36.5g of argon gas at a pressure of 8.20atm. The valve is opened and gas is allowed to escape until the pressure is reduced to 4.75atm at constant temperature. How many grams of argon escaped?
December 4, 2013 by Caitlyn

Math
find the volume of iron require to make an open box whose external dimensions are 36 cm * 25cm* 16.5 cm and 1.5 cm thick throughout. if 1 cm3 of iron weighs 8.5 grams, find the weight of the empty of box in kilograms..
August 10, 2014 by Abhay

Chemistry
A chemist reacts 112 g of iron with 72 g of water. State which reactant is the limiting reagent. Calculate what is the maximum yield in grams of Fe3O4 that could be produced in this reaction. For the substance that is not the limiting reagent, calculate the amount in excess.
March 12, 2015 by Lily

chemistry
Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2) fluoride.
March 24, 2008 by Anonymous

chemistry
Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2) fluoride.
March 24, 2008 by Anonymous

chemistry
The mass of the tin produced is 0.71 grams What is the theoretical mass of tin that should have been produced?
April 18, 2008 by Rendier

Science
Is this correct? work= .01 x mass x distance mass measured in grams distance measured in meters Is this right??
October 12, 2008 by Alli

chemistry
How many grams of silver chloride can be prepared by the reaction of 122.2 mL of 0.22 M silver nitrate with 122.2 mL of 0.16 M calcium chloride?
October 28, 2010 by faye

chemistry
if 2.7 moles od sodium carbonate reacts with 5 moles of copper(II) sulfate, how many grams of sodium sulfate will be produced?
February 16, 2011 by valentina

Chemistry
Copper (II) fluoride contains 37.42%by mass. Calculate the mass of fluorine(in grams)contained in 55.5 g of Copper(II) Fluoride.
February 27, 2011 by Trudy

Chemistry
How much heat is necessary to change 5 grams of water at 10 degrees celcius to water at 70 degrees celcius?
May 19, 2011 by Princess

chem
A piece of plastic has a mass of 14.2 grams and volume of 16.8cm cube. What is the mass of 1.00cm cube of this plastic? Thanks for your help.
June 10, 2012 by mia

chem
How much heat is necessary to change 5 grams of water at 10 degrees celcius to water at 70 degrees celcius?
September 23, 2012 by Sophie

chem
how would you prepare 445 grams of solution containing 13% mass HCL from 34.1 mass % of HCL solution
February 24, 2014 by SDW

Chemistry 2 Ap
Can someone please help me ? What mass of glycerol must be dissolved in 200.0 g of water to give a solution with a freezing point of -1.50? im not sure how to even start this problem. I think i would find the moles in water first, then the grams in glycerol after? Pleaseee help!
February 10, 2009 by jecce.

Chemistry
Piece of iron weighs 20 pounds and measures 1 ft. by 1 ft. by 4in. What is its density in grams/cc? 20lbs/1 x 12inx12inx4in/1 x .454kg/1lb x 1g/1000kg x 1in^3/2.54cc= 20/1 x 576/1 x .454/1 x 1g/1000 x 1/2.54cc= 13.28g/cc The right answer is supposed to be.96g/cc Why is my ...
October 1, 2011 by Anonymous

Chemistry
Piece of iron weighs 20 pounds and measures 1 ft. by 1 ft. by 4in. What is its density in grams/cc? 20lbs/1 x 12inx12inx4in/1 x .454kg/1lb x 1g/1000kg x 1in^3/2.54cc= 20/1 x 576/1 x .454/1 x 1g/1000 x 1/2.54cc= 13.28g/cc The right answer is supposed to be.96g/cc Why is my ...
October 2, 2011 by Anonymous

Chemistry/stoichiometry
If you can do just one for me I can used it as a template to do the rest. Thank you in advance For each reaction, calculate the mass (in grams) of the product formed when 10.3 of the underlined reactant completely reacts. Assume that there is more than enough of the other ...
October 26, 2012 by Dale

Chemistry (Stoichiometry)
Potassium superoxide (KO2)reacts in the following equation: 4KO2 + 2H2O +4CO2 =4KHCO3 + 3O2 If a person wearing an oxygen mask exhales 0.85 grams of CO2 every minute, how many moles of KO2 are comsumed every 10.0 minutes?
February 7, 2013 by Alexus

Chem
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 650mL of a solution that has a concentration of Na+ ions of 1.50M ? Explain answer with three significant figures and ...
September 25, 2013 by Yuki

Chemistry
1) Calculate the energy. in joules, of a photon of wavelength 1.250x 10^3 nm 2) If 3.011x 10^23 molecules have a mass of 20.04 grams, what is the molar mass of the substance? Is it 40.07g/mol? 3) 47.5g of Boron contains __________ atoms of B? Is it 2.65x10^24 4) What is the ...
February 15, 2014 by Annabelle

Chemistry
How many grams of sodium acetate, NaC2H3O2, would have to be added to 5.00 L of 0.65 M acetic acid (pKa 4.74) to make the solution a buffer for pH 4.00? I did this but it's not the right answer: 4 =4.74 + log(A/.65) 0.74=log(A/0.65) 10^-0.74= A/0.65 0.182 = A/0.65 0.118= A 0....
April 24, 2014 by Ava

chemistry
Something that will lower the freezing point of water to -3.7 degrees Celsius if one mole were placed in 1000 grams of water? To solve this I know I have to use the equation Tf= IKfm, Tf= 3.7, but how I go about the problem there if I don't know Kf or the the mole of solute (...
May 27, 2014 by A

Chemistry
Calculate the total heat (in Joules) needed to convert 1.602 x 101 grams of ice at -1.383oC to liquid water at 8.554 x 101oC. Melting point at 1 atm 0.0oC Cwater(s) = 2.09 J/goC Cwater(l) = 4.18 J/goC delta Hofus = 6.02 kJ/mol
January 12, 2015 by Devin

Chemistry
Sulfuric acid can dissolve aluminum metal according to the following reaction. 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 24.4g . What minimum amount of H2SO4 in grams would you need?
March 24, 2015 by Kelsey

Chemistry
Benzene (C6H6) is an organic compound that boils at 80.1C. If 100.0 grams of liquid benzene at 18.5C is given 16.88 kJ of energy, what is the final temperature (in C) of the benzene? The ΔHvaporization for benzene = 31.0 kJ/mol and the specific heat of liquid benzene...
April 15, 2011 by Laura

Chemistry
If 20mL of a 0.100 M NaOH solution are required to titrate 0.25 grams of an unknown acid, what is the equivalent mass of the acid? If the acid actually contains 3 moles of H+ per mole of acid what is the molecular mass of the acid?
February 4, 2014 by Linda

CHEMISTRY
Dye of iodine is prepared by dissolving in ethanol , and 1% ( one percent ) of this solution contains 10 g of solute in 1000 g of solution 1) how many grams of solvent is there in the solution ? 2) how many moles of solute ( I2) is there? 3) what is the molality of 1% of this ...
July 12, 2014 by MAD

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