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August 21, 2014

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

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chemistry
How many minutes are needed to plate out 29.00g Mg from molten MgCl2, using 2.70A of current?
Tuesday, April 29, 2014 at 5:52pm

chemistry
How many milliliter of 2.5 M NaOH are neededto neutralize 2.7 ml of a 4.9 M H2SO4 solution?
Tuesday, April 29, 2014 at 5:37pm

Chemistry
Provide equations for each of the following: a. Dissociation of a strong base in water solution b. Ionization of a strong acid in water solution: c. Ionization of a weak acid in water solution: d. Ionization of a weak base in water solution: e. Autoionization of water:
Tuesday, April 29, 2014 at 4:38pm

Chemistry
Classify each of the compounds below as strong or weak acids, strong or weak bases, or salts: A. HCl B. KOH C. NH4NO3 D. H2SO4 E. NH4OH F. H3PO4 G. NaOH H. HClO4 i. Mg(OH)2 J. H2CO3 K. BaSO4 l. HC2H3O2 The numbers are sub(little numbers
Tuesday, April 29, 2014 at 4:24pm

Chemistry URGENT
Could someone let me know if I answered these questions? 1. How do you classify the liquid pair mineral oil -- H2O, miscible or immiscible? I believe the answer is immiscible because oil and water do not mix. 2. what would be the Molarity of a solution containing 0.5 mole of ...
Tuesday, April 29, 2014 at 3:50pm

Chemistry
Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 1.9×10−9M Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 2.1×10−2M Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH&#...
Tuesday, April 29, 2014 at 11:12am

Chemìstry
The following two solutions were combined and mixed well: 150.00 mL of a 3.500 M iron(¡¡¡) nitrate solution and 760.00mL of a 1.600M magnesium nitrate solution. 20.00mL of the final solution was transferred with a pipette into an empty 250.00mL volumetric ...
Tuesday, April 29, 2014 at 10:54am

Chemistry
The following two solutions were combined and mixed well: 150.00 mL of a 3.500 M iron(¡¡¡) nitrate solution and 760.00mL of a 1.600M magnesium nitrate solution. 20.00mL of the final solution was transferred with a pipette into an empty 250.00mL volumetric ...
Tuesday, April 29, 2014 at 10:53am

chemistry
pure water has a hydrogen ion concentration of 1 x 10-7 m and a ph of 7. a student measures a basic solution and finds that it has a hydrogen ion (H+) concentration of 1 x 10-3. explain why the student must have an error in her statement
Tuesday, April 29, 2014 at 9:13am

Chemistry
Did I ionize Mn2(CO3)3 correctly? Mn2(CO3)3 --> 2Mn^(3+) + 3CO3^(2-)
Tuesday, April 29, 2014 at 2:11am

Chemistry
If a plant has 88.0 g carbon dioxide and 64.0g water available for photosynthesis determine: a the limiting reactant b. the excess reactant and the mass in excess c. the mass of glucose produced
Tuesday, April 29, 2014 at 12:13am

chemistry
The boiling point of another member of this homologous series was found to be 309 K \rm K. What is the likely molecular formula for this compound?
Monday, April 28, 2014 at 11:54pm

Chemistry
A saturated solution of magnesium iodate has a temperature of 50°C. it contains 175g of dissolved solute. What is the volume of the solution?
Monday, April 28, 2014 at 10:37pm

Chemistry
A system which undergoes an adiabatic change (i.e., q = 0) and has work done on it by the surroundings has a. w < 0, ΔU = 0 b. w < 0, ΔU < 0 c. w > 0, ΔU < 0 d. w > 0, ΔU > 0 e. w < 0, ΔU > 0
Monday, April 28, 2014 at 9:20pm

Chemistry
Hydrogen peroxide can act as either an oxidizing agent or a reducing agent, depending on the species present in solution. Write balanced half-reaction equations for each of the following: (a) H2O2(aq) acting as an oxidizing agent in an acidic solution. Write the balanced half-...
Monday, April 28, 2014 at 9:09pm

chemistry
what are three examples of a hypothesis? Or at least one....
Monday, April 28, 2014 at 8:53pm

chemistry
. A 0.428-gram sample of a mixture of the solids, KCl and KClO3, is heated. If 80.7 mL of oxygen gas is collected over water at 18.0 oC and 100.8 kPa, calculate the mass percentage of KClO3 in the mixture. (PH2O at 18.0 oC = 15.5 torr
Monday, April 28, 2014 at 6:40pm

Chemistry lab reports online?
Are there any websites with other students' lab reports with calculations online? I do not want to copy and am completely against plagiarism. I just want to look at others' examples to help in giving me ideas on how to write my own and make sure I have enough ...
Monday, April 28, 2014 at 6:38pm

Chemistry: Please check my work!I am stumped
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ...
Monday, April 28, 2014 at 4:39pm

Science chemistry
How much mgs can be obtained from 20g of mg and 20 g of s by the reaction mg+s_>mgs
Monday, April 28, 2014 at 4:34pm

Chemistry: please help, I am stumped
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ...
Monday, April 28, 2014 at 4:28pm

chemistry
Under standard conditions, the Gibbs free energy of the reactants G,std(reactants) in a reaction in the gas phase is 232.94 kJ and the Gibbs free energy of the products G,std(products) is 211.56 kJ. Calculate the value of the equilibrium constant for this reaction under ...
Monday, April 28, 2014 at 4:17pm

chemistry
1.00 of an aqueous solution contains 1.52g of a compound used in antifreeze. If the osmotic pressure of this solution at 20.0 degree C is 448 torr, calculate the molar mass of the antifreeze compound
Monday, April 28, 2014 at 12:22pm

chemistry
what is the boiling point of 0.212 m lactose in water?
Monday, April 28, 2014 at 12:16pm

chemistry
calculate the vapor pressure of a solution 0.53 mol of cholestrol in 4.1 molof toluene at 32 degree C. pure toluene has a vapor pressure of 41 torr at 32 degree C
Monday, April 28, 2014 at 12:15pm

chemistry
how many grams of hydrogen are needed to completely react with 8 moles of nitrogen from this equation N2+H2=NH3
Monday, April 28, 2014 at 8:34am

Chemistry
Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. U^4+ --> UO2^+ There is a hint: In acidic solution, you may add H2O and H as needed to balance oxygen and hydrogen. When finished, don\'t forget...
Monday, April 28, 2014 at 6:42am

Chemistry
separate this redox reaction into its component half-reactions. O2 + 4Cu-->2CuO Oxidation half-reaction: ? Reduction half-reaction: ? I believe that the Oxidation is copper and that reduction is oxygen. So I tried to write it as 4Cu^+ --> 4Cu + 4e^- O2^2- +4e^- ---> ...
Monday, April 28, 2014 at 6:39am

Chemistry
Dear Sir DrBob22 Thank you for your response we have an oil well. the well column has been completed (filled up) with completion fluid of gasoline. we want to stimulate the well by 28% HCL. if 28% HCL is to be injected into the the well column, whether a chemical reaction will...
Monday, April 28, 2014 at 5:37am

Chemistry
use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. on the chart is said ethane(C2H6) is -84.0. In the hint it said ...
Monday, April 28, 2014 at 5:08am

Simple Chemistry
A.Write a brief procedure outling how would you prepare 250mL of a 0.150M solution of a CoCl2 from solid CoCl2 and distilled water b. Using the solution from part a and distilled water, how would you prepare 100ml of a 0.0600 M solution of CoCl2 C. What absorbance would you ...
Monday, April 28, 2014 at 4:46am

Chemistry
A reaction : A(aq)+B(aq) --> C(aq) has a standard free-energy change of –4.01 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively? I used ...
Monday, April 28, 2014 at 4:33am

Chemistry URGENT/DR BOB
Hello Dr.Bob, the saturate at 60 degrees Celsius is 85.5g i hope this helps with the problem I posted at 12:49am thanking you in advance
Monday, April 28, 2014 at 1:49am

Chemistry URGENT
Help. what is the formula to figure out the total mass of a solution?
Monday, April 28, 2014 at 1:34am

Chemistry URGENT
can someone please tell me what formula's to use for the 2 following chemistry problems. 1. Calculate the solubility of potassium bromide at 23 degrees Celsius. hint. Assume that the solubility increases by an equal amount for each degrees between 20 degrees C and 30 ...
Monday, April 28, 2014 at 12:49am

Chemistry
what three substances are usually electrolytes?
Monday, April 28, 2014 at 12:17am

Chemistry
comparing and contrasting why is sodium hydrogen carbonate an effective antacid but sodium hydroxide is not?
Sunday, April 27, 2014 at 11:17pm

Chemistry
comparing and contrasting why is sodium hydrogen carbonate an effective antacid but sodium hydroxide is not?
Sunday, April 27, 2014 at 11:16pm

chemistry
By titration it is found that 20.5 mL of 0.168 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution
Sunday, April 27, 2014 at 11:02pm

chemistry
By titration it is found that 20.5 mL of 0.168 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution
Sunday, April 27, 2014 at 9:52pm

Chemistry
At what temperature (∘C) will xenon atoms have the same average speed that Cl2 molecules have at 35∘C?
Sunday, April 27, 2014 at 9:43pm

Chemistry
Methane gas, CH4, is sold in a 43.0L cylinder containing 5.91kg .What is the pressure inside the cylinder (in kilopascals) at 21∘C?
Sunday, April 27, 2014 at 9:41pm

Chemistry
Traffic on the German autobahns reaches speeds of up to 230 km/h.At what temperature (∘C) do oxygen molecules have this same average speed?
Sunday, April 27, 2014 at 9:40pm

Chemistry
What is the molecular mass of a gas that diffuses through a porous membrane 1.86 times faster than Xe?
Sunday, April 27, 2014 at 9:39pm

Chemistry
An unknown gas is placed in a 1.500 L bulb at a pressure of 356 mm Hg and a temperature of 22.5 ∘C, and is found to weigh 0.8108g .What is the molecular mass of the gas?
Sunday, April 27, 2014 at 8:35pm

Chemistry
What is the specific heat of an unknown substance if a 2.45g samples releases 12.9 cal as its temperature changes from 25.1 degrees C to 20.1 degrees C?
Sunday, April 27, 2014 at 8:15pm

Chemistry
A small cylinder of helium gas used for filling balloons has a volume of 2.85L and a pressure of 13300kPa at 25 ∘C.How many balloons can you fill if each one has a volume of 1.50L and a pressure of 1.26atm at 25 ∘C?
Sunday, April 27, 2014 at 7:51pm

chemistry
how do you see the answers to these stupid questions on this stupid website??????
Sunday, April 27, 2014 at 7:41pm

Chemistry
Oxygen gas is commonly sold in 48.0L steel containers at a pressure of 130atm .What volume (in liters) would the gas occupy if its temperature was raised from 20.5∘C to 40.0∘C at constant 130atm ?
Sunday, April 27, 2014 at 7:27pm

chemistry
hi
Sunday, April 27, 2014 at 6:20pm

chemistry
A 37.0 g mass of a metal was heated to 100°C and then plunged into 74 g of water at 24.0°C. The temperature of the resulting mixture became 28.0°C. (a) How many joules did the water absorb? (b) How many joules did the metal lose? (c) What is the heat capacity of ...
Sunday, April 27, 2014 at 5:28pm

Chemistry
Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. A 3.279 g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen rich environment. The products of the combustion ...
Sunday, April 27, 2014 at 4:35pm

Chemistry
If 22.5 L of Oxygen reacted with excess hydrogen, how many liters of water vapor could be produced?
Sunday, April 27, 2014 at 4:00pm

Chemistry
At a pressure of 103kPa and a temperature of 22 degrees C, 52.9 g of a certain gas has a volume of 31.5 L. what is the identity of this gas?
Sunday, April 27, 2014 at 3:59pm

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] =3M and [H2]=0.8M, both at equilibrium. How many grams of ammonia are in the 10L reaction vessel at equilibium? Use the ...
Sunday, April 27, 2014 at 3:44pm

chemistry
estimate the mass of BaSO4 that will be produced when a 100ml of a 2M solution of Ba(NO3)2 in water is added toa 100ml of a 2M solution of NaSO4 in water
Sunday, April 27, 2014 at 2:16pm

Chemistry
The compound M2X3 has a molar solubility of 0.0190 M. What is the value of Ksp for M2X3? Here are the choices: 1. 3.52 × 10^-6 2. 4.12 × 10^-5 3. 8.91 × 10^-8 4. 2.48 × 10^-9 5. 2.67 × 10^-7
Sunday, April 27, 2014 at 2:02pm

Chemistry
A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].
Sunday, April 27, 2014 at 1:38pm

Chemistry
A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].
Sunday, April 27, 2014 at 1:37pm

chemistry
What is the net ionic equations for: 1. Arsenic(III) iodide + Sodium sulfide 2. Lead(II) nitrate + Ammonium oxalate 3. Magnesium chromate + Copper(II) sulfate
Sunday, April 27, 2014 at 12:44pm

Chemistry
At 25C, an equilibrium mixture of gases con- tains 0.00680 mol/L PCl3, 0.0290 mol/L Cl2, and 0.00500 mol/L PCl5. PCl5(g) ⇀ ↽ PCl3(g) + Cl2(g) What is the equilibrium constant for the reaction? How would I do this? I'm so confused!
Sunday, April 27, 2014 at 12:18pm

chemistry
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ...
Sunday, April 27, 2014 at 10:12am

Chemistry
dose the gasoline react with HCL 28%? if OK, what is its equation? Thanks
Sunday, April 27, 2014 at 4:25am

chemistry
2H2(g) + S2(g) ¡ê 2H2S(g) Analysis of the contents of a 15.0L flask reveals that there are 4.4 moles of hydrogen gas, 2.0 moles of sulfur gas, and 3.7 moles of hydrogen sulfide gas in the flask at equilibrium. Calculate the equilibrium constant K
Saturday, April 26, 2014 at 11:36pm

Chemistry 2
calculate the PH of a mixture containing 30 mL, 0.10M HC2H3O2? (Ka=1.8x10^-8 of HC2H3O2)
Saturday, April 26, 2014 at 11:21pm

Chemistry
Iodine 131 is a radioactive isotope. After 4.00 days, 70.8% of a sample of 131I remains.What is the half life of 131I?
Saturday, April 26, 2014 at 10:18pm

Chemistry
NH4NO3(s) ¡æ N2O(g) + 2H2O(§¤). How much water is produced if 22.9 g of N2O is produced in this reaction? Answer in units of g I converted grams of N2O to mol. Then I did a mol ratio getting mol of H2O. Then I converted mol of H2O to grams. I got 18....
Saturday, April 26, 2014 at 6:08pm

Chemistry
How many of the following changes would alter the numerical value of the equilibrium constant Kp for the reaction 2OF2(g) ⇀ ↽ O2(g) + 2F2(g)? I) an increase in temperature II) a decrease of the container volume III) adding more O2 at constant volume IV) adding a ...
Saturday, April 26, 2014 at 5:50pm

Chemistry URGENT
A student heated a hydrated salt sample with an initial mass of 4.8702 g, After the first heating, the mass had decreased to 3.0662 g (two part question) 1. if the sample was heated to constant weight after reheating, what is the minimum mass that the sample can have after the...
Saturday, April 26, 2014 at 5:23pm

Chemistry URGENT
I need help to evaluate if I completed my experiment calculation. determination of water in a hydrate. 1. Mass of crucible, and cover = 18451.3 2. Mass of crucible, cover and sample = 23410.2 3. Mass of crucible, cover and sample after 1st heating = 21789.8 4. Mass of crucible...
Saturday, April 26, 2014 at 5:02pm

chemistry
how many grams of HCL is needed to produce 200 grams of hydrogen?
Saturday, April 26, 2014 at 4:05pm

Chemistry URGENT/DR BOB
Hello DR. BOB, the correct value in the problem posted at 1:17pm regarding Student A and Student B accuracy and random error is the: MEAN of 2.63 g/mL. Could you take a look back at that post and let me know if i answered 2 and 3 correctly.
Saturday, April 26, 2014 at 2:39pm

Chemistry URGENT
I need help figuring out the calculations of my experiment. I'm sure I did something wrong cause I can not figure how to calculate the mass of sodium chloride. My measurements follow. 1. 250 mL beaker = 8.4 2. Mass of container = 0.4013 3. mass of container + sodium ...
Saturday, April 26, 2014 at 1:27pm

chemistry URGENT
I need someone to check my answers to make sure that I have the correct answers. (3 Part Question) Two students each measure the density of a quartz sample three times: Student A Student B 3.20 g/mL 2.82 g/mL 2.58 g/mL 2.48 g/mL 2.10 g/mL 2.59 g/mL mean 2.63 g/mL 2.63 g/mL 1. ...
Saturday, April 26, 2014 at 1:17pm

chemistry
the freezing point of water is -1.86 degree Cm, if 5.00 g Na2SO4 is desolve at 45.0g H2o the freezing point is changed by -3.82 degree C. Calculate the Van't Hoff Factor for Na2SO4
Saturday, April 26, 2014 at 2:30am

chemistry urgent!
what is the net ionic for these following balanced equations: 2(NH4)3PO4(aq) + 3Ba(OH)2(aq) -> Ba(PO4)2(s) + 6H2O(l) + 6NH3(g) 2HNO3(aq) + K2CO3(aq) -> H2O(l) + CO2(g) +2KNO3 NaF(aq) + HCl(aq) -> NaCl(aq) + HF(aq)
Friday, April 25, 2014 at 9:48pm

College Chemistry
If 3.00 moles of NaCl were mixed with 0.9 L of 0.5 M of AgNO3, how many moles of solid would form? Include the formula for the solid.
Friday, April 25, 2014 at 9:41pm

Chemistry
What is the final concentration if 27.08 (MW: 36.46) dissolved in 55.51 ml?
Friday, April 25, 2014 at 8:46pm

Chemistry
What is the chemical reaction between these chemicals? NH4Cl + Na2SO3 NH4Cl + NaOH Na2SO3 + BaCl2 Na2SO3 + NaOH H2SO4 + BaCl2 BaCl2 + NaOH
Friday, April 25, 2014 at 7:47pm

chemistry
What volume of ethanol must be diluted with water to prepare 315 mL of 0.620 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL
Friday, April 25, 2014 at 5:27pm

chemistry
It takes 10 workers to produce 39 parts in a month in that same time a machine can take 6 parts and produce 1 products which sell for $100 each. If you want to make $1000 worth of sells, how many workers are needed?
Friday, April 25, 2014 at 4:18pm

chemistry
If 3.00 moles of NaCl were mixed with 0.2 L of 1.5 M of AgNO3, how many moles of solid would form? Include the formula for the solid.
Friday, April 25, 2014 at 4:17pm

Chemistry
You added how may mols NaOH? That's M x L = mols. What final volume do you have. You added 18.01 mL and 10 mL so total volume is 28.01 mL. Convert that to L., then M = mols/L Do I do 0.1M x .01801L = 0.001801mols? Then do M = 0.001801mols/0.02801L? I'm a little ...
Friday, April 25, 2014 at 4:15pm

Chemistry
I am trying to complete a lab called Precipitation Titration of Cobalt Chloride. I've done the experiment and I got that if you combine 18.01mL of 0.1M NaOH with 10mL of CoCl2, the precipitate is forms. Now how do I calculate the concentration of the amount of NaOH I added...
Friday, April 25, 2014 at 2:49pm

Chemistry
HELP!! I'm doing an experiment to do with phosphorus and plant food and MgNH4P04 6H20 my air dry weight of MgNH4P04 6H20 was 1.31 g grams of P in plant food was .165 g % P in plant food is 13.87% % P205 equivalent to % P above is 63.02% % P 205 in 10-52-10 is 52% i then ...
Friday, April 25, 2014 at 12:51pm

Chemistry. Please
If 15ml of 1M sulfuric acid is used until faint pink endpoint is reached how many moles of magnesium hydroxide are in 50ml solution. Please help
Friday, April 25, 2014 at 6:20am

Chemistry. Please :(
1. If 23.00 grams of carbon dioxide and 18.75 grams of water are formed from the combustion reaction. What is the percent yield for CO2 and H20. How much in grams of the excess reactant remains? 2. Balance the equation and determine the mass in grams of hydrogen gas produced ...
Friday, April 25, 2014 at 4:43am

Chemistry
At 25 °C, the equilibrium partial pressures for the following reaction were found to be PA = 4.10 bar, PB = 5.60 bar, PC = 1.20 bar, and PD = 9.70 bar. 2A(g)+2B(g)-->C(g)+ 3D(g) What is the standard change in Gibbs free energy of this reaction at 25 °C. I don't ...
Friday, April 25, 2014 at 3:51am

Chemistry
A reaction has a standard free-energy change of –4.60 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively?
Friday, April 25, 2014 at 2:26am

Chemistry
How do you calculate ΔSfus and ΔSvap for HCl given melting point,ΔHfus, boiling point, and ΔHvap also how do you determine the entropy change when 5.20 mol of HCl(l) freezes at atmospheric pressure.
Friday, April 25, 2014 at 1:19am

Chemistry
The following equation represents the decomposition of a generic diatomic element in its standard state. (1/2)X2(g)--->X(g) Assume that the standard molar Gibbs energy of formation of X(g) is 5.45 kJ·mol–1 at 2000. K and –64.30 kJ·mol–1 at 3000...
Friday, April 25, 2014 at 1:09am

Chemistry
For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 bar for all species. For the reaction C2H6(g)+H2(g)---->2CH4 the standard change in Gibbs free energy is ΔG° = -32.8 kJ/mol. What is ΔG for this reaction at 298 K when the ...
Thursday, April 24, 2014 at 11:47pm

Chemistry
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by ATP(aq) +H2O (l) --->ADP(aq) +HPO4^2- for which ΔG°rxn = &#...
Thursday, April 24, 2014 at 11:42pm

Chemistry URGENT
I am not good with math problems. I need help with these two problems. I'm not sure what equations to use. please help. A student heated a hydrated salt sample with an initial mass of 4.9702 g. After the first heating, the mass had decreased to 3.0662g. 1. if the sample ...
Thursday, April 24, 2014 at 11:36pm

chemistry
What is the standard entropy of reaction, the standard entropy of reaction, in J/K, for the combustion reaction of ethylene described in the previous questions? The temperature is 298.15K. (Enter your answer as a signed number in scientific notation without units.) My answers ...
Thursday, April 24, 2014 at 11:05pm

Chemistry
The mechanism for the reaction described by NO2(g) + CO(g) ---> CO2(g) + NO (g) is suggested to be (1) 2NO2(g) --->(k1) NO3(g) + NO (g) (2) NO3(g) +CO(g) --->(k2) NO2(g) + CO2(g) Assuming that [NO3] is governed by steady-state conditions, derive the rate law for the ...
Thursday, April 24, 2014 at 10:50pm

chemistry
calculate the concentration of a solution when 35.0g of k2so4 is dissolved in enough water to make to make 125.0g solution.
Thursday, April 24, 2014 at 9:40pm

chemistry
0.050 kg of 4.0% (m/m) MgCl2 the answer is 2.0g MgCl2 how do you show the work
Thursday, April 24, 2014 at 9:05pm

Chemistry
calculate the pH of a solution after .054 moles of KOH is added to a 1.0L buffer solution of .25M HF (Ka=7.1 x 10^-4) and .10M KF
Thursday, April 24, 2014 at 8:14pm

Chemistry
The mechanism for the reaction described by 2N2O5(g) ---> 4NO2(g) + O2(g) is suggested to be (1) N2O5(g) (k1)--->(K-1) NO2(g) + NO3(g) (2) NO2(g) + NO3(g) --->(K2) NO2(g) + O2(g) + NO(g) (3) NO(g) + N2O5(g) --->(K3) 3NO2(g) Assuming that [NO3] is governed by steady...
Thursday, April 24, 2014 at 7:16pm

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