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February 14, 2016

Search: 14 carat gold has a purity of 58.3%. How many moles of gold are in 154 grams of 14 carat gold? Answer in

Number of results: 64,120

chemistry
If one pound (454g) of hexane combusts how many grams of water are produced? How do u set this up? Start it?
March 31, 2015 by sarah

chemistry
What volume of a 0.553 M calcium hydroxide solution is needed to exactly neutralize 7.34 grams of KHP
April 9, 2015 by Pam

chemistry
a beaker contains 75.6 grams magnesium oxide (MgO) in 175 ml of solution, calculate the molarity?
May 18, 2015 by kedron

college chemistry
how many grams of copper can be reduced by applying a 3.00 A current for 16.2 minutes, to a solution containing Cu^(2+) ions?
May 20, 2015 by Anonymous

Chemistry
how many grams of butane must be burned in an excess of o2 gas in order to produce 7.64l of co2?
June 2, 2015 by Arielle

Chemistry
The solubility of potassium nitrate at 20C is 340g/litre. How many grams of KNO3 can dissolve in 185ml of water?
September 7, 2015 by Samuel

math
how much cesium-137 would remain after 120.0 years if you started with 34.0 grams
September 13, 2015 by tanella

Chemistry
How many grams of iron must be oxidized to produce 5.0g of rust? (Fe2O3) I have no idea how to solve this!
September 15, 2015 by John

chemistry
how many grams of NaCl should be added in 15ml which must have a final concentration of 10mM
November 17, 2015 by Josh

chemistry
calculate the weight in grams far a given solution of sodium thiosulphate crystals of strength 2.0M
January 21, 2016 by sonia

Chemistry
1. As the intermolecular forces between molecules increase in magnitude, do you expect each of the following to increase, decrease or remain the same? My answers: Viscosity: increase Boiling point: increase Vapor pressure: decrease Surface tension: increase Heat of ...
February 13, 2016 by Student

Chemistry
1. As the intermolecular forces between molecules increase in magnitude, do you expect each of the following to increase, decrease or remain the same? My answers: Viscosity: increase Boiling point: increase Vapor pressure: decrease Surface tension: increase Heat of ...
February 14, 2016 by Student

Chemistry revision
all these questions I got wrong on my homework today ...I'm trying to find out why and what the correct answers were .. please help How many grams of solute are required to make a 504 mL solution of copper (I) nitrate with a concentration of 1.3317 M? before I had help and was...
April 29, 2013 by Tif

Chemistry
How many grams of propane must be burned to provide the heat needed to melt a 70.0-g piece of ice...? How many grams of propane must be burned to provide the heat needed to melt a 70.0-g piece of ice (at its melting point) and bring the resulting water to a boil (with no ...
January 24, 2012 by help

Chemistry
Ethyl butyrate is an artificial fruit flavor commonly used in the food industry for such flavors as orange and pineapple. It can be produced by the reaction of butanoic acid with ethanol in the presence of an acid catalyst. i) Given 8.45g of butanoic acid and excess ethanol, ...
September 19, 2012 by grangeH

chemistry
3CuCl2 *2H2O + 2Al = 3Cu + 2AlCl3 + 6H2O Determine the number of grams that should have been produced when 1.25g of copper (2) chloride dehydrate reacts with excess aluminum so i'm not really sure how you're supposed to calculate the number of grams with hydrates?? MCuCl2= 63....
November 27, 2014 by julie

Algebra
1.What is the shape of the graph of any linear function? Answer-line 2. Solve for x in |5x -2| >5 Answer- 2/3 < x <1 3. Compare the quantity in Column A with the quantity in Column B. Column A x + 12 Column B 12 + x Answer-The two quantities are equal 4. Write a ...
August 7, 2011 by lizzie

Chemistry
Barium carbonate and nitric acid reacts in a double displacement reaction. One of products also dissociates and evolves carbon dioxide. Write the net ionic reaction including the proper use of phase labels for this solution run in aqueous solution. After this the following ...
June 24, 2013 by Holly

managerial Accounting
Smith Co uses a standard cost system for its single product in which variable manufacturing overhead is applied on the basis of direct labor hours. The following information is given: 4 Standard costs per unit: Raw materials (1.5 grams at $16) $24.00 Direct labor (0.75 hour at...
September 30, 2010 by Klatoyaa

Algebra
Simplify the expressions and solve the equations 1. 2√3 - √12 My answer: 2√3 - 2√3 = 0 2. √(5p + 5)^2 = √(6p + )^2 I got the answer p = 4 3. √(28) + √(63) + √(175) This one seems so simple. I tried multiple times, but I can...
March 11, 2014 by Student

CHEMISTRY HELP!
a. According to the Henderson-Hasselbalch equation, how many grams of sodium acetate will you need to add to 125 mL of 0.100 M acetic acid to make a pH=4.74 buffer? (I found this to be 1.025g) I need help with the rest b. What is the actual pH of the resulting buffer when you ...
April 7, 2011 by Anonymous

math
Order of Magnitude (I'm not quite understanding it) 1) trying to 0.0000000734 estimated as the product with a single digit power of 10.*No multiple choice* 2) Trying to find the numbers that a greater than 7 x 10^-4 (Choose more than one answer type question) - 8 x 10^-4 * my ...
September 8, 2014 by Anonymous

Algebra 1
17) Simplify [32/-8]/-1/2 Answer: -8 18) Add -7+(-9) Answer: -16 19)Solve 7(3x -2)=28 Answer:x=2 20)Solve using the addition principle 6.4=x-3.7 Answer:x=10.1
November 5, 2008 by deedee

french
Can you check these. Thanks Un petit accident (Fill in the blanks) 1. Il a eu un petit ---------. Answer: accident 2. Qu'est-ce qui lui est -------? Answer: arriv 3. Il a ------ sur une peau de banane. Answer: glisse 4. Sur une peau de banane? Et il est --------? Answer: ...
September 11, 2010 by miami

chemistry
According to the American Insurance Companies, on average, a vehicle is driven 12,000 miles per year. In the chemical equation below, gasoline is given as octane, or C8H18. Assume the vehicle gets 22.0 miles per gallon. The density of octane is 0.703 g/mL. 2 C8H18 + 25 O2 ...
July 4, 2015 by lollo

Science. Check Answer
Decided wheather work is being done or not. If it is being down write W. If not write N 1. You throw a baseball a distance of 20 meters. My answer: W 2. You lift a suitcase to put in the overhead luggage compartment of a plane. My answer: N 3. You push against a brick wall ...
April 28, 2014 by Kalie

Chemistry
using the ideal gas law i have v=5.60L, P=1.75ATM, and T=250.0 k. how many moles are there. I don't have my book with me so i can't use find the real question
March 4, 2008 by a

chem
how do you calculate the number of millilliters of 1 M required for an amount of moles? and how would i find out what remains in the beaker when distilled water is evaporated from a beaker?
May 6, 2008 by Kayla

chemistry 106
calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.
February 28, 2010 by Tanisha

Chemistry
Time, (min): 0 10 20 30 Moles,(trans): 1.00 0.90 0.81 0.73 Given the following data, what is the order of the reaction? How long will it take for the half of the trans compound to decompose?
March 24, 2010 by Jamie

Chemistry
How many moles of ammonium sulfate can be made from the reaction of 30.0 mol of NH3 with H2SO4 according to the following equation? 2NH3  H2SO4 (NH4)2SO4
May 27, 2010 by Tiers

college chemistry
calculate the pressure exerted by 2.50 moles of CO2 confined in a volume of 5.00 L at 450K. Compare the pressure with that predicted by the ideal gas equation.
July 8, 2010 by david

college chemistry
calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.
July 8, 2010 by david

Chemistry
Please help solve; 2Al +3Cl2 --> 2AlCl3 You are give 31.0g Al and 36.0g of Cl2. If you had excess chlorine, how many moles of of aluminum chloride could be produced from 31.0 g of aluminum?
September 28, 2010 by Jeremy

chemistry
Help!! Can someone please show me how to set up this problem. I'm lost. C3H8+5O2-->3CO2+4H20 If 19.2g of C3H8 and 19.2g O2 react, how many moles of CO2 can be produced?
November 5, 2010 by josh

Chemistry
Can anyone just show me the steps and point me in the right direction??? A sample of oxygen gas has a volume of 8.00 L at 20.0 C and 700. torr. How many moles does the sample contain?
December 1, 2010 by Anonymous

chem
Metabolism of one mole of glucose, C6H12O6, releases 670 kcal. How much heat is released by the combustion of 0.300 moles of glucose?
October 30, 2011 by Jessie

chemistry
Calculate the concentration in molarity of sugar in a solution made by dissolving 0.34 moles of dextrose (C6H12O6) in enough water to make 3.00 Liters of solution
December 2, 2011 by Seep

chemistry
3. Compound A is provided as a 500mM solution. If 12.5 mL is taken and added to 12.5mL of water, how many moles (or millimoles / micromoles) are there per 0.1mL of the diluted solution?
December 8, 2011 by jenny

science
Compound A is provided as a 500mM solution. If 12.5 mL is taken and added to 12.5mL of water, how many moles (or millimoles / micromoles) are there per 0.1mL of the diluted solution?
December 9, 2011 by jake

Chemisty
N2+3H2=2NH3 Assume 0.150 mol of N2 and 0.477 mol of H2 are present initially. After complete reaction, how many moles of ammonia are produced?
April 20, 2012 by Jenn

chemistry
how many moles of ammonium sulfate can be made from the rxn of 30.0 mol of NH3 with H2SO4 according to the following equation: 2NH3 +H2SO4-->(NH4)2SO4
May 28, 2012 by Sara

chemisty
a 10.00ml diluted chloride sample required 44.89 ml of 0.01982 m abno3 to reach the fajans end point. how many moles of cl ion were present in the sample
October 25, 2012 by lisa

Physical Chemistry
Calculate DS if the temperature of 3 moles of an ideal gas with Cv,m = 1.5R is increased from 200 K to 500 K under conditions of (a) constant pressure and (b) constant volume.
November 30, 2012 by Lawrence

physics
A tank holds 2.85 L of oxygen at 22.1 Celsius and 235 atm. (A) how many moles of gas does the tank contain? (B) what is the average kinetic energy per molecule ?
December 31, 2012 by Physics student need help

chemistry
What is the molarity (moles per liter) of an aqueous solution that is prepared by dissolving 5.58g NaOH (MW=40) in enough water to make 250mL of solution?
March 28, 2013 by Kishwa

Crown poly
0.012moldm^3 of H2SO4 was prepared in 2 litre of volumetric glass.calcute (a)mass concentration. b.moles of H2SO4 used. C.density of solution
April 11, 2013 by Jummy

Chemistry
In the reaction, K2Cr2O7 +14 HCl ----> 2KCl + 2CrCl3 + 3Cl2 + 7H2O how many moles of HCl act as reducing agent in balanced chemical equation?
April 15, 2013 by Clandestine

Chemistry
How many moles of sulfuric acid are required to neutralize 0.80 mol of sodium hydroxide? H2SO4 + 2NaOH -> Na2SO4 + 2H2O I got 0.40 mol. Is this right?
May 13, 2013 by Anonymous

chemistry
Lets say you do a titration of the acid and realize it took you 14.29mL of 0.103 mol/L NaOH(aq) to neutralize all the acid. How many moles of base did it take?
September 17, 2013 by Sue

Biology
What is the water potential of a 5.7 L water in which 2.1 moles of NaCl has been dissolved at 30 degrees celcisus? Help please? Can you show work as well? It'll be greatly appreciated. Thanks in advance.
September 27, 2014 by Ali

Chemistry
An unknown gas sample is collected in a 255mL container at 25 C and 755 mmHg. How many moles of gas are present? show solution please so i can learn:D
February 19, 2015 by Dianne

chemistry
Consider the following reaction: 2 Mg + O2 → 2 MgO △H rxn = -1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg.
December 6, 2015 by katia

chem again!
In 80 gm of NaOH ,how many moles of NaOH are there?
October 25, 2009 by Elvira

chemistry
If you have 18 g of Ag2O, how many moles do you have
December 2, 2010 by sheri

Chemistry
How many moles of H3PO4 are there in 35.0 mL of 0.60 M H3PO4 solution?
October 3, 2011 by Anonymous

Chemistry
How many moles of CaCl2 are in 250mL of a 3.0M of CaCl2? Ca=40.08 -- Cl=35.45 X 2 ?? Thanks
October 14, 2011 by Emily

chemistry
How many moles of nitrogen is 1.52 10 17 nitrogen atoms?
February 5, 2012 by kr

chemistry
How many moles of silver atoms are in 2.8 x 10^20 of silver?
May 23, 2012 by Tiffany H.

Chemistry
How many moles of H20 are in 430g of H20?
March 21, 2013 by Jasmin

Chemistry cp
How many moles of fertilizer are there in 55,000g of fertilizer
December 11, 2013 by Mary J.

Chemistry
How many moles of magnesium are in Magnesium Chloride?
October 25, 2014 by Gina

Damon or DrBob please help..chemistry/physics
Question: 0.37 litre of an ideal monatomic gas (Cv,m = 3R/2) initially at 51 C and 36 atm pressure undergo an expansion against a constant external pressure of 1.06 atm, and do 2.3 kJ of work. The final pressure of the gas is 1.06 atm. Calculate the change in enthalpy, Δ...
January 22, 2016 by Ashley

Chem
A particular coal contains 2.5% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas. The sulfur dioxide reacts with calcium oxide to form solid calcium sulfite. If the coal is burned in a power plant that uses 1800 tons of coal per day, ...
September 17, 2012 by Ezra

science - chemistry pH problems
Here is the hint I received on how to solve those tough pH problems I posted earlier: Both of these can be solved using the H-H and doing the algebra. The math itself is hard to type out, but in Q1 the values of [NaA] and [HA] are 0.04805 and 0.15195. In Q2 you will have to ...
October 11, 2006 by ajones51

Chemistry [back-titration] - please check my sol'n
A 7.00 gram sample containing the mineral tellurite was dissolved then treated with 70.0 mL of 0.03114 M K2CrO7. 3 TeO2 + Cr2O7 ^2- + 8 H+ -> 3 H2TeO4 + 2 Cr3+ + H2O When reaction is complete, the excess Cr2O7 2- required a 14.05 mL back titration with 0.1135 M Fe2+. ...
March 19, 2014 by Nina

Chemistry
A bottle that holds 250 grams of water holds only 175 grams of gasoline. What is the density of the gasoline? Take the density of water to be 1.0 g/ml mass = volume x density. Rearrange to find volume = mass/density volume of the bottle = 250/1.00 = ?? Now that you know the ...
February 15, 2007 by Sarah

chemistry
If a student attempts to identify an unknown compound by methodused in this experiment. She finds that when she heated a sampleweighing 0.4862 g the mass went down appreciably, to 0.3067 g. Whenthe product was converted to chloride, the mass went up, to 0.3382g. a. Is the ...
February 27, 2013 by johnson

Chemistry
Can someone please explain how to do this problem? I am really confused. Thank you. 3. How much heat does 32.0 grams of water absorb when it is heated from 25.0 degrees Celsius to 80.0 degrees Celsius? q = mass*specific heat water*(Tfinal-Tinitial) = ??. mass is 32.0 g Tfinal...
July 19, 2007 by Amy

chemistry.
What amount (in moles) of FeS2(s) are required to produced 64g of SO2(g) according to the following equation? 4FeS2(s) + 110(g)_________2FeO3(s)__8SO2(g)...remember the first long bar is an arrow.
September 28, 2009 by mary.

Chem
How many moles of ions are released when this sample is dissolved in water? 3.55*10^18 formula units of Ba(OH)2*8H2O? So far I know to divide this by avogadro's number (/6.022*10^23) which equals .590*10^-5 mol. Don't know what to do from here. Please help!
November 6, 2009 by L

Chemistry
From my previous question about partial pressures in the equation 2H2(g)+O2(g)>2H2O(g), how can I use PV=nRT to find the number of moles in each of the reactants when I am not given the temperature, or the volume of the individual gases?
October 2, 2012 by Heather

Chemistry
1 L of 0.002 mol/L Pb(NO3)2 has been prepared. Given that ksp for PbCl2 is 1.7 x10^-5, what is the largest number of moles of nacl that can be added to this solution without causing a precipitate to form.
December 9, 2013 by Vader

chemistry
You have four beakers labeled A, B, C, and D. In beaker A, you place 100 grams of silver nitrate and enough water to make 50 mL of solution. In beaker D, you place 100 grams of KCl and enough water to make 100 mL of solution. You also pour 100 mL of water into beaker B and 200...
April 24, 2008 by brandi

Math
Can someone explain relating metric units. going form liters to milliliter and kilograms to grams?
September 6, 2007 by Kristine

chemistry
to make 100mL of a solution that is .25M in chloride ion, how many grams of MgCl2 would you need to dissolve
September 15, 2007 by samantha

chemistry
o make 100mL of a solution that is .25M in chloride ion, how many grams of MgCl2 would you need to dissolve
September 16, 2007 by samantha

chem
determine the solubility of each of the following grams of solute per 100. g H2O a) NaNO3 at 10C b) KNO3 at 60C c) NaCL at 50C
May 4, 2008 by jerson

solubility graph
what temperature is required to dissolve 110 grams fo sodium nitrate in 100 cm3 of water?
November 10, 2008 by tony

Chemistry
What volume of 0.1209 M HCl is necessary to neutralize 0.5462 grams Ca(OH)2? Include a balanced chemical equation.
February 19, 2009 by Jake

Chemistry
What volume of 0.1209 M HCl is necessary to neutralize 0.5462 grams Ca(OH)2? Include a balanced chemical equation.
February 19, 2009 by Kourtney

College chemistry
Calculate the number of grams of silver nitrate required to prepare 2.00L of 0.500 M AgNO3.
April 6, 2009 by mysterylvr6

Chem - Stoichiometry
How many grams of sodium carbonate is required for a complete reaction with 1.00g of calcium chloride dihydrate? Help!
October 17, 2009 by Erin

Chem - Stoichiometry
How many grams of sodium carbonate is required for a complete reaction with 1.00g of calcium chloride dihydrate? Help!
October 18, 2009 by Erin

chemistry
Hi, I am stop on a question that I need to use conversions for. Could someone explain to me how to do this? How many grams of SO3 could be formed from 1.2 x 10^22 atoms of O?
November 26, 2009 by Klaud

reactions
if you have 66.6g NH3 how many grams of F2 are required for a complete reaction? PLEASE SHOW ALL WORK AND/OR STEPS!!!!
February 7, 2010 by Anonymous

chemistry
calculate the number of grams of co2 that can be absorbed by complete reaction with a solution that contains 5.00 g of sodium hydroxide
February 9, 2010 by Anonymous

Chemistry
200. g of a solvent is available, how many grams of a solute should be weighed out to make a 15.0% solution by mass?
February 10, 2010 by CC

Chemistry
how much heat is liberated by the combustion of 206 grams of hydrogen? ΔHcomb= -286kj/mol
February 22, 2010 by Anonymous

chemistry
What is the formula used to solve the problem: How many milliliters of 1.171 M HCl are required to react with 7.69 grams of CaCO3 ?
March 4, 2010 by Paige

Science
Homw many grams of copper sulfate pentahydrate (CuSo4 5H2O) would you heat to produce 29.8 g of water?
March 9, 2010 by Anne

chemistry
assuming x=1, how much CuSO4.5H20 would you need to prepare 6 grams of copper ammine complex?
March 15, 2010 by jess

SCIENCE?CHEMISTRY***
how many dozens of dust particles are in 2.45 g if each particle has a mass of 2.51 x 10^-4 grams...? I dont have a clue!!!!!! Thanks Andy
May 14, 2010 by ANDY

science
If 75grams of KNO3 are dissolved in 100 grams of H2O at 45 degrees Celsius, what level of saturation is in the soultion.
May 19, 2010 by Sally

Chemistry
How many grams of liquid water can be solidified by the release of 0.75kJ of heat? Would the first step be (0.75 kJ)(1 mol/6.01 kJ) ?? Thanks
May 24, 2010 by Anonymous

chemistry
determine the number of grams of solute needed to make 1.05 mole solution of HNO3 in 2.00Kg ofH2O
June 1, 2010 by raymond

11th grade
Calculated how many grams of methane (CH4) are in a sealed 80 mL flask at room temperature (22C) and 780 mm Hg of pressure.
June 16, 2010 by Shakeria Crew

college
In the reaction Fe2O3 + 3CO 2Fe + 3CO2 How much CO is used to produce 112 grams of iron?
July 12, 2010 by Dillon

chemistry
In the reaction Fe2O3 + 3CO 2Fe + 3CO2 How much CO is used to produce 112 grams of iron?
July 13, 2010 by Dillon

Chemistry
If you are making 180.0 mL of 3.00% (m/m) CuSO45 H2O, how many grams of the solute should you use? I can't figure out what to do with the percent.
September 8, 2010 by Megan

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