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March 29, 2017

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Number of results: 46,266

Chemistry
A sample of glucose, C6H12O6, contains 1.300x10exponent21 atoms of carbon. How many atoms of Hydrogen does it contain? How many molecules of glucose does it contain?
June 15, 2011 by Ray

chemistry
The vapor pressure of pure water at 25 degrees Celsius is 23.77 mm Hg. What is the vapor pressure, in mm Hg, of water above a solution that is 1.5m glucose, C6H12O6?
December 11, 2011 by Anonymous

Math
A pole vaulter cleared the bar at 490 cm. Convert 490 cm to meters using a unit multiplier
January 27, 2011 by Lizzie

Gen chem 2
D-Glucose, C6H12O6, is an aldohexose sugar which occurs commonly in nature. In a text or reference book look up "-D-(+)-Glucose and write its correct, complete Lewis structure. Then “parcel” e’s to determine the correct (O) no. for each C atom in this molecule. I am so ...
July 7, 2008 by Elisa

bio
4. In the Krebs cycle (or citric acid cycle), starting with citrate, what happens? a. Organic compounds become more reduced and CO2 is produced b. Organic compounds become more oxidized and CO2 is produced c. Some organic compounds become reduced and electron carriers become ...
April 6, 2009 by doug

chemistry
Nitroglycerine decomposes according the the equation: 4C3H5(NO3)3 -> 12 CO2 + 10 H2O +6N2 + O2. 15.0 g of nitroglycerine is placed in a 500 ml flask at 25.0 C. The vapor pressure of water at this temperature is 23.8 mmhg. Find the total pressure in the flask after the ...
March 15, 2010 by Ben

Chemistry
Calculate the standard enthalpy change for the reaction 2C8H18(l)+17O2(g)> 16CO(g) + 18H2O(l) Given 2C8H18(l)+25O2(g)>16CO2(g)+18H2O(l) deltaH=-11020 kj/mol 2CO(g)+ O2(g)>2CO2(g) Delta H=-566.0 kj/mol The > is supposed to be an arrow :)
November 17, 2011 by Nicole

chemistry
Consider the reaction: N2(g) + 3 H2(g) --> 2 NH3(g). At a particular time, the nitrogen is being consumed at a rate of 0.60 moles/sec. At this same time, what is the rate at which ammonia is being formed? a. 3.0 mol/s b. 0.12 mol/s c. 0.30 mol/s d. 2.0 mol/s e. 1.2 mol/s
January 10, 2017 by Jessie

chemistry-Dr BOB
Hi Dr. Bob, I first want to tank you for all your help. Secondly, I don't understand why this was marked wrong. When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this ...
October 18, 2015 by patrick

Chemistry
If 111.70 g of iron react with oxygen gas to produce iron (III) oxide, how many moles of oxygen gas will be needed?
April 2, 2011 by Heyyy

college chemistry
. One possible use for the cooking fat left over after making french fries is to burn it as fuel. Formula (for cooking fat) = C51H88O6 Density = 0.94 g/ml ΔH°f = - 1310 kJ/mol. Write a balanced equation of the combustion of cooking fat (the products are CO2 (g) and H2O (...
April 17, 2010 by George

Chemistry
Please check my answers. 1. Using the equations, IO3- +5I- + 6H+ -> 3I2 + 3H2O C6H8O6 + I2 -> C6H6O6 + 2I- + 2H+ how many equivalents of IO3- are required to produce enough I2 to oxidize one equivalent of ascorbic acid? Answer: 1IO3- <-> 3I2 <-> 3C6H8O6 1/3 ...
February 27, 2011 by Sara

Chemistry
When one pound of gasoline (made up of compounds of hydrogen and carbon) is burned in an automobile approximately 3 pounds of carbon dioxide, CO2, is given off. Carbon dioxide is one of the gases contributing to global warming. What information from this experiment helps ...
October 3, 2010 by Chris

chemistry
1. A 123.00 liter sample of acetylene gas (C2H2) is reacted with excess oxygen at 27 C and 1 atm to produce carbon dioxide and water vapor. Calculate the following: a. The volume of CO2 produced at 1 atm and 400 C. b. The mass of H2O vapor produced.
November 26, 2011 by britney

chem
Consider the unbalanced chemical reaction Al + Cl2 → AlCl3. How many moles of AlCl3 can be obtained from 360 grams of Cl2? (Molar masses: Cl = 35.45 g/mol, Al = 26.98 g/mol) when i balance the equation i get 2Al+3Cl2->2AlCl3 but when i try to figure out the answer i ...
October 5, 2014 by bekah

Chemistry
The reaction for the metabolism of sucrose, C12H22O11, is the same as for its combustion in oxygen to yield CO2(g) and H2O(l). The standard heat of formation of sucrose is -2230 kJ mol-1. Based upon data in Table 6.2 and problem 6.75 the amount of energy (in kJ) released by ...
June 29, 2011 by Jessica

Chemistry
When 1.63 g sample of an unknown hydrocarbon is completely burned in oxygen, 4.97 g of CO2 are produced. What is the percentage by mass of hydrogen in this hydrocarbon? THANK YOUU Found out the formula: 4CH+5O2--> 4CO2+2H2O then found out the moles of CH= 0.1251 I don't ...
September 14, 2015 by Alex

General Chemistry
An unknown compound has a formula of CxHyOz. You burn 0.1523 g of the compound and isolate 0.3718 g of CO2, and 0.1522 g of H2O. What is the empirical formula of the compound? If the molar mass is 72.1 g/mol what is the molecular formula?
December 8, 2010 by Jashmid

Chemistry
How many moles of K3PO4 are required to react completely with 4.5 moles of CaCl2 2K3PO4 + 3CACl -> Ca3(PO4)2 + 6KCL
June 16, 2009 by James

Chemistry
If 45.3 mL of liquid CS2 and 7.62 L of gaseous O2 measured at STP are reacted stoichiometrically according to the balanced equation, how many milliliters of liquid CS2 remain? CS2(l) + 3O2(g) -> CO2(g) + 2SO2(g) Molar Mass (g/mol) CS2 76.143 O2 31.998 Density (g/mL) CS2 1....
April 20, 2010 by Lisa

Chemistry
In 2.00 min, 28.4 mL of He effused through a small hole. under the same pressure and temperature, 9.69 mL of a mixture CO and CO2 effused trough the hole in the same amount of time using the following mathematical formula relating rate of effusion to molar mass(M), Calculate ...
October 31, 2010 by Sarah

chemistry
How many moles of O2 are needed to react with 2.90 moles C2H2
October 16, 2010 by Nic

chemistry
How many moles of Cu are needed to react with 3.50 moles of AgNO3?
October 30, 2010 by Randy

Chem
How many moles of C are needed to react with 85.5 moles of Al2O3 ?
July 11, 2011 by PaulaB

chem
how many moles of O2 are needed to react with 4.00 moles of acetylene?
May 15, 2012 by Anonymous

Chemistry
how many moles of NO are needed to react with 15.0 moles of NH3
January 29, 2013 by Chris

Science
How many moles of O2 are needed to react with 1.5 moles of SO2?
March 13, 2014 by Unanomous

Chemistry #25
Use enthalpy of formation data to calculate the number of moles of CO2(g) produced per megajoule of heat released from the combustion of each fuel under standard conditions (1atm and 25 degrees C) a. coal C(s, graphite) = _____mole-MJ b. natural gas, CH4(g)= c. propane, C3H8(g...
October 28, 2013 by Chelsea

Chemistry 110
Write the formulas of the principal molecular or ionic species present in an aqueous solution of each substance. (a) Sodium Chloride, NaCl (b) Hydrogen bromide, HBr (c) Iron (III) sulfate, Fe2(SO4)3 (d) Ethanol, CH3CH2OH (e) Glucose, C6H12O6 (f) Ammonium acetate, NH4CH3COO
November 9, 2010 by kim k

chemistry
Calculate the weight (in mg) of borax Na2B4O7.10H20 required to react with 25.0 mL if 0.100 M HCI No. moles HCl consumed = __________ moles No. moles borax required = __________ moles Molar mass of borax = __________ g mol-1 (Na2B4O7.10H2O) Weight borax required = __________ g...
April 22, 2013 by alex

Chemistry
Is is possible to get 100% on a percent yield? Now, For Cup A I had : Mass of cup water & stirrer: 67.51 mass of sodium bicarbonate: 1.00g mass of citric acid: .76g total mass of all: 69.27g mass of cup, solution, stir after reaction: 68.75g difference (CO2 mass) = 0.52 My ...
March 2, 2017 by Rose

Chemistry
Compound X contains only carbon, hydrogen, nitrogen, and chlorine. When 1.00 g of X is dissolved in water and allowed to react with excess silver nitrate, AgNO3, all the chlorine in X reacts and 1.95 g of solid AgCl is formed. When 1.00 g of X undergoes complete combustion, 0....
January 6, 2016 by Sarah

Chemistry
When we test for carbon dioxide gas, we bubble it through limewater and get a white precipitate CaCO3. What is the equation for the reaction? Is it CO2 + Ca(OH)2 --> CaCO3 + H2O
January 24, 2009 by janice

Chemistry
I don't quite understand why this isn't balanced and what we'd have to do to balance it and why. If someone could explain in-depth I would appreciate it. Balance this equation: C2H5OH(l) + O2(g) >>>>> CO2(g) +H20(g)
May 2, 2012 by Kaelan

chem
determine the mass (g) of SO2 that is produced byt the reaction of 15g of CS2 according to the following equation: CS2 + 3O2 = CO2 + 2SO2
May 20, 2013 by jonathan

Chemistry
For the following reactions, determine the equilibrium constant equation. 1) CO2(g) + H2(g) CO(g) + H2O(g) 2) 2NO(g) + 2H2(g) N2(g) + 2H2O(g) 3) Cu(s) + 2Ag+(g) Cu2+(g) + 2Ag(s) 4) H2(g) + I2(g) 2HI(g)
January 10, 2017 by Steve

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

AP Chemistry
ratedetrmining-step: 3X(g) + 2Y(g) = 4Z(g) When 2 moles of gas X and 2 moles of gas Y are placed in a 5.0L vessel, the initial rate of the rxn is found to be 0.45 (mol/L x min. What is the rate constant? P.S: I think k=1.875(L/mol x s) but im not sure.
February 2, 2011 by qwerty123

Delta T
In the delta T formula how do you find i = ? If its ionic like NaCl then i = 2 What if its like C6H12O6? i = 1 ? or i = 3? Since that is not ionic i would assume it will be 1
May 4, 2009 by Chopsticks

Chemistry
When 1 gram of sex hormone (contains C, H, and O) was burned in a combustion analysis, 1.5 grams of CO2 and 0.405 grams of H2O were obtained. The molar mass was found to be 352g/mol. What is the molecular formula for the sex hormone?
June 20, 2011 by IVY

chemistry
The rate constant of the reaction between CO2 and OH - in aqueous solution to give the HCO3- ion is 1.5 1010 1/(M·s) at 25°C. Determine the rate constant at blood temperature (37°C), given that the activation energy for the reaction is 38 kJ/mol. units 1/(M·s)
June 12, 2012 by parker

chemistry
how many moles of ethylene reacted if 0.50 mole of water is produced. C2H4 + 3O2 --- 2CO2 + 2H2O
April 13, 2010 by Jazminh

Chemistry
a student used a 0.358 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.102 g. Based on this result, answer the following questions: Determine the mass of NaHCO3 that produced the CO2 in the experiment. Determine the % mass of NaHCO3 in the sample. Determine the ...
October 18, 2012 by Jena

Chemistry
When 320.62 grams of Bi2O3 react with excess of C, how many moles of Bi form? I know I need to use stoichiometry, but I can't quite seem to get the correct balanced equation.
June 30, 2011 by Brooke

CHEM! (SCIENCE) NEED HELP
Balance the equation; ___Mg+__HCI->__MgCI2+__H2 How many moles of hydrogen gas are produced when 3.0 molesbof magnesium react?
January 24, 2013 by tyneisha

stoichiometry & partial pressure
1 mole of oxygen gas and 2 moles of ammonia are placed in a container and allowed to react at 850 C according to the equation: 4NH3 + 5O2 --> 4NO + 6H2O Q: if the total pressure in the container is 5.00 atm, what are the partial pressures for the three gases remaining? I'm ...
January 28, 2007 by dory

Chemistry
The Solvay process for the manufacture of sodium carbonate begins by passing ammonia and carbon dioxide through a solution of sodium chloride to make sodium bicarbonate and ammonium chloride. The equation for this reaction is H2O + NaCl + NH3 + CO2 ¨ NH4Cl + NaHCO3. In the ...
April 2, 2010 by David

Chemistry
Initially, 1.68 mol of PCl5(g) and 0.36 mol of PCl3(g) are in mixed in a 2.00 l container. It is later found that 1.44 mol of PCl5 are present when the system has reached equillibrium. Calculate the value of the equllibrium. This is what I did: Equation: PCl5(g) <--> ...
July 19, 2009 by Lena

chemistry
A mixture of gases at a total pressure of 95 kPa contains N2, CO2, and O2. The partial pressure of the CO2 is 24 kPa and the partial pressure of the N2 is 48 kPa. What is the partial pressure of the O2?
July 29, 2008 by natasha

chemistry
A mixture of gases at a total pressure of 95 kPa contains N2, CO2, and O2. The partial pressure of the CO2 is 24 kPa and the partial pressure of the N2 is 48 kPa. What is the partial pressure of the O2?
August 4, 2008 by kayla

Chemistry
A mixture of gasses at a total pressure of 95 kPa contains N2, CO2, and O2. The partial pressure of the CO2, is 24 kPa and the partial pressure of the N2 is 48 kPa. What is the partial pressure of the O2?
February 22, 2010 by Bob

chemistry
A 5.000 g sample of a mixture which contains MgCO3 and sand (SiO2) was heated for 2.30 hours until no further reaction occurred. It was then cooled and the residue, which contained MgO and unchanged sand, was weighed. The reaction is: MgCO3(s)  MgO(s) + CO2(g). The ...
October 6, 2012 by anonymousplm

Chemistry
A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O. What was the composition of the original mixture? Assume ideal gas behavior Im pretty sure i use dalton's law of partial pressures ...
September 19, 2012 by Drew

Chemistry
A solution contains 1.694 mg of CoSO4 (MW 155.0) per mL. Calculate a) The volume of 0.008640 M EDTA needed to titrate a 25.00 ml aliquot of this solution. Step 1. 0.001694g * 25ml * 1/155 g/mol= 0.0002732 mol Step 2. Volume of EDTA needed = 0.0002732 mol/ 0.008640 M = 0.03125 ...
January 21, 2015 by Sam

thermochemistry
what is the enthalpy change in kilojoules for the combustion of 1 mol of ethanol, C2H5OH (l), to form gaseous carbon dioxide and gaseous water? use bond energies to calculate your answer. (hint: there is a double bond in carbon dioxide and oxygen) the answer is supposed to be...
January 23, 2007 by Sienna

Chemistry
Use the equation below to answer the following questions. Al + H2SO4 ==> Al2(SO4)3 + H2 A. If 8.15 moles of aluminum are reacted, how many moles of hydrogen will be produced? B. If 44.7 g of hydrogen sulfate is reacted, what mass of aluminum sulfate is produced? C. If 34.6 ...
February 29, 2008 by katie

Chemistry
3. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution's concentration? The CO2 in the distilled water will create a more acidic solution which will affct the determination of NaOH solution's concentration? How is the term acid...
March 11, 2014 by Sandy

Chemistry
I don't really understand why unit analysis works. I found a simple example on a website (I can post the link in a comment if you want). It says, For example, convert 18 grams of water to moles. The molar mass of water is 18 g/mol; therefore : 18g H2O x 1 mol/18g H2O = 1 mol ...
February 7, 2013 by A Canadian

chemistry
A piece of nickel foil, 0.550 mm thick, 1.25 cm width and 1.00 cm long, is allowed to react with fluorine, F2 to give a nickel fluoride. Density of nickel is 8.908 g/cm3. How many moles of nickel foil were used? If you isolated 1.261 g of nickel fluoride, what is its formula? ...
November 12, 2008 by Sarah

Chemistry
Which equation does not fit the definition of oxidation? 1. Na ® Na+ + e- 2. C2H6 ® H2 + C2H4 3. C + O2 ® CO2 4. Ag+ + e- ® Ag Can some one help. I do not know which one. I am working on a practice test and there are no answers in the back of the book.
November 3, 2011 by nan

Chemistry
These are the answers I got for the following problems - am I right? 1) How many grams of water, H2O, and propene, C3H6, can be formed from the reaction of 6.0 g of 2-propanol, C3H8O? C3H8O ----> C3H6 + H2O 1.8g H2O and 4.2g C3H6 2) How many moles of water, H2O, can be ...
November 29, 2009 by Mary

chem
When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 1.0 M HCl is required to react completely with 4.00 g of magnesium i did 4.00g x (mol/24.31 g Mg) x (2 mol HCl/1 mol Mg) x (L/!.0 mol HCl) = .329 L why ...
March 26, 2009 by Anon

Physical Science
Which of the following does NOT show the law of conservation of mass? A. 24 g of Mg burn in 32 g O2 to produce 56 g of MgO. B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO. C. 2 atoms of Mg react with 1 molecule of O2 to produce 2 units of MgO. D. 1 atom of Mg reacts ...
August 27, 2013 by Brandon

CHEMISTRY.....AND THIS IS IMPORTANT
2. If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L of octane vapor, C8H18? b. what volume of each product is produced? 25L C8H18 x (25 mol O2/2 mol C8H18) = 312.5 L O2 (if it were pure O2). Then 20.9% of what number = ...
October 12, 2013 by Anonymous

CHEMISTRY...IMPORTANT
2. If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L of octane vapor, C8H18? b. what volume of each product is produced? 25L C8H18 x (25 mol O2/2 mol C8H18) = 312.5 L O2 (if it were pure O2). Then 20.9% of what number = ...
October 12, 2013 by Anonymous

Chemistry 101
I don't remember my instructor going over this and the book isn't explaining it very well. Can anyone help answer these? Indicate the concentration of each ion or molecule present in the following solutions. 1. 0.30 M NaNO3 2. 1.5x10^-2 M MgSO4 3. 2.00x10-2 M C6H12O6 4. A ...
February 22, 2010 by Kelsey

Chemistry
An equilibrium mixture in a 10.0 L flask contains 7.0 mol HI(g) and 1.0 mol each of I2(g) and H2(g). If 2.5 mol H2, 5.0 mol I2 and 2.0 mol HI are added to that equilibrium mixture how many moles of each gas will be present when equilibrium is reestablished?
April 16, 2014 by Jon

chemistry
A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
March 29, 2013 by kat

chemistry
A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
April 6, 2013 by MadiB PLEASE HELP :(

chemistry
A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
April 6, 2013 by MadiB PLEASE HELP :(

chemistry
How many grams of PbCO3 will dissolve when exactly 5.0 L of 1.25 M H is added to 6.0 g of PbCO3? When the equation is PbCO3(s) + 2H(+)(aq) = Pb(2+)(aq) + H2O(l) + CO2(g)
October 3, 2011 by Anonymous

chemistry 101
The enthalpy change was determined for the following reactions; Ca (s) + CO2 (g) + ½ O2 (g ) → CaCO3 (s) ΔH = -812.8 kJ/mo l Ca (s) + ½ O2 (g) → CaO (s) ΔH = -634.9 kJ/mo l What is the enthalpy change for the following reaction? CaCO3 (s) → CaO (s...
April 29, 2012 by Anonymous

Chemistry
Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH3, according to the equation 3H2(g)+N2(g)→2NH3(g) PArt 1: How many grams of NH3 can be produced from 3.26 mol of N2 and excess H2. Part 2: How many grams of H2 are needed to produce 13.17 g of NH3? part 3...
February 7, 2017 by Rose

chemistry
how to balance this equation by using electron ion method 1. C2O4(-2 charge)+ MnO4(- charge) + H(+)-----> CO2 +Mn(+2 charge)
April 17, 2009 by humaira

Chemistry
When the oxide of generic metal M is heated at 25.0 °C, only a negligible amount of M is produced. O2M(s) ----> M(s) +O2(g) delta G= 290.5 Kj/mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous. What is the chemical ...
January 14, 2014 by Angela

Chemistry
Using the van der Waals equation, calculate the pressure (in atmospheres) exerted by 91.14 g of Cl2 at 91.11 °C in a 1.00 L container. The van der Waals constants for Cl2 are a = 6.490 L2*atm/mol2 and b = 0.05620 L/mol.
October 14, 2015 by Help123

chemistry
Determine whether ∆H is equal to, greater than, or less than ∆U for the following reactions. Keep in mind that “greater than” means more positive or less negative, and “less than” means less positive or more negative. Assume that the only significant change...
February 6, 2011 by danny

chemistry
Use Table 9.4 to calculate an approximate enthalpy or heat of reaction for the combustion of one mole of methane gas (CH4) to form gaseous H2O and CO2. What Volume (in L) of methane is needed to produce 3287 kJ of heat for methane gas at 11 oC and 3.40 atm pressure?
November 5, 2014 by john

chemistry
In a reaction vessel, the following reaction was carried out using 0.250 mol of NH3 and 0.100 mol of N2, 4NH3(l) + N2 (g) = 3N2H4 (l) what is the compositon in moles in the vessel when the reaction is completed? Is the answer: 0 mol NH3, 0.063 mol N2, and 0.188 mol N2H4?
November 14, 2011 by Lisa

Science - Chemistry
Aluminum oxide is formed from the reaction of metallic aluminum with oxygen gas. How many moles of Aluminum are needed to form 3.4 moles of Aluminum oxide? Writr the equation and balance it. 4Al + 3O2 ==> 2Al2O3 The equation tells you that 4 mols Al are needed to form 2 ...
January 23, 2007 by Sara

Chemistry
When treating a patients physicians use an isotonic means that this solution will have the same osmotic pressure as the body fluid such as blood. how many grams of glucose (C6H12O6) is in 100.0 g of H2O in the isotonic glucose solution (5.00% m/m)?
December 10, 2014 by Tina

chem
Carbon monoxide is detected in air samples by its reaction with diiodine pentoxide to form carbon dioxide and elemental iodine: CO+I2O5 --> CO2+I2. Balance the equation.
January 5, 2010 by desperate

chemistry
The combustion reaction of acetylene gas is represented by this equation: 2C2H2(g) + 5 O2(g) ==> 4CO2(g) + 2H2O(g) How many grams of CO2 and grams of H2O are produced when 52.0g C2H2 burns in oxygen?
March 22, 2010 by Danny

College Chemistry
Using this equation: CH4(g)+2O2(g)---> CO2(g)+ 2H2O(l) What is the value of Enthalpy( triangle H) if 15.00g of O2 is reacted?? How do i set up the mole to mole ration?? with what am i comparing it too??
March 30, 2010 by Anonymous

chemistry
C25H52 + __38__ O2 -------> __25__ CO2 + __26__ H2O + energy a) Balance the equation. Count atoms below. ___________ carbon ___________ ___________hydrogen___________ ____________oxygen____________
May 22, 2012 by Quinn

Chemistry
How many moles and number of ions of each type are present in the following aqueous solution? 113 mL of .490 M aluminum chloride.
October 4, 2011 by Tyler

chemistry
a system consisting of 1.5 mol CO2(g), initially at 15deg and 10 atm and confined to a cylinder of cross-section 10.0 cm2. it is allowed to expand adibatically against an external pressure of 1.0 atm until the piston has moved through 20 cm. assume that carbon dioxide may be ...
October 1, 2014 by rhulani j mathebula

Chem
How many grams of KO2 are needed to produce 370.0 L of O2 at 20.0 degrees Celsius and 1.00 atm? 4KO2(s) +2CO2(g) --> 2K2CO3(s)+ 3O2(g)
March 11, 2013 by Anonymous

Chemistry
How much water would be formed if 3.00 mol NH3 reacted with excess oxygen gas in the following equation? Given the reaction 4NH3+ 5O2 --> 4NO + 6H2O A) 2.00 mol B) 3.00 mol C) 4.50 mol D) 6.00 mol E) None of these
April 9, 2016 by Petey

Chemistry
If 35.0 mL of 0.210 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Is the answer 0.8176 L Convert moles of HCl: 2.10 x 0.035= 0.00735 mol of HCl Convert to moles of H2: 0.0735 x 1 mol H2/ 2 mols HCl= 0....
November 24, 2014 by Mike

chemistry
Calculate enthalpy change of reaction for the combustion of gaseous ethanol. C2H5OH + 3O2 >> CO2 + 3H2O. Using standard molar enthalpies of formation. C2H5OH -235.3 ( it's negative sign) CO2 -393.5 H2O -241.8 (1) Calculate the enthalpy change of reaction per mole of ...
April 20, 2010 by Alex

Chemistry
A mixture of ethyne gas (C2H2) and methane gas (CH4) occupied a certain volume at a total pressure of 16.8 kPa. When the sample burned, the products were CO2 gas and H2O vapor. The CO2 was collected and its pressure found to be 25.2 kPa in the same volume and same temperature ...
March 21, 2011 by Kim

Chemistry
so if the equation I'm using is 3CuSO4+2AL(NO3)3 arrow 3CU(NO3)2+Al2(SO4)3 how many moles of CuSO4 would be needed to produce 8 moles of Al2(SO4)3? Would the answer be 8?
April 21, 2009 by Marc

chemistry
Explain in word how you would prepae 250mL of a 3.000 M solution of Ba(OH)2 starting form barium hydroxide and water..... 2 equation 2CoI3 + 3 K2S= Co2S3 + 6KI 2 moles of Cobalt (III) iodide + 3 moles of Potassium sulfide = cobalt (III) sulfide + 6moles of Potassium Iodide ...
October 10, 2010 by pete

Chem year one
what is the balanced net ionic equation for the oxidation of hydrogen peroxide by permanganate ion and find out how many moles of hydrogen peroxide react with one mole of permanganate ion. would the answer be: 2MnO4^- + 6h^+ + 5H2O2 ---> 2Mn^2+ + 8H2O + 5O2 ratio of 2:5 0.4...
November 22, 2013 by kay

chemistry
A major component of gasoline is octane C8H18. When octane is burned in air, it chemically reacts with oxygen gas O2 to produce carbon dioxide CO2 and water H2O. What mass of octane is consumed by the reaction of 8.8g of oxygen gas? Round your answer to 2 significant digits.
August 9, 2016 by Emily

Chemistry
If 0.200mol of nitrogen gas and 0.200mol of oxygen gas react, what is the limiting reactant? N2(g)+O2(g)→2NO(g) How many moles of NO are produced according to the equation? Please show how to perform this equation with the answer please.
October 25, 2014 by Tonya

science
i need help with more questions in the packet heres my question the poisonous gas hydrogen sulfide, H2S, can be neutralized with a base such as sodium hydroxide, NaOH. THE unbalanced equation for this reaction follows: NaOH(aq)+H2S(g)→Na2S(aq)+H2O(l) a student who was ...
January 12, 2015 by maddy

Chemistry
Given the balanced equation representing a reaction : 2Fe+ 3Cu^2+ --> 2Fe^3+ +3Cu When the iron atoms lose six moles of electrons, how many moles of electrons are gained by the copper ions? (1) 12 moles (2) 2 moles (3) 3 moles (4) 6 moles how would i even start solving a ...
February 16, 2014 by Anonymous

Chemistry
Lysine, an essential amino acid in the human body, contains C,H,O, and N. In one experiment, the complete combustion of 2.175g of lysine gave 3.94g CO2 and 1.89g H2O. In a separate experiment, 1.873 g of lysine gave 0.436 g NH3. (a) Calculate the empirical formula of lysine (b...
August 27, 2010 by Amy~

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