Wednesday
December 17, 2014

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

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analytical chemistry
Adding 10.0 mL of 0.500 M HCl to 100.0 mL of pH = 7 water produces a solution with a pH of 1.34. What is the pH of the resulting solution when 10.0 mL of 0.500 M HCl is added to 100.0 mL of the buffer solution in the introductory example? That buffer contained 0.100 moles of ...
Monday, November 17, 2014 at 12:57pm

AP Chemistry
Which of the following statements is true regarding two points within a system? A. They will have different types of particles. B. They cannot interact with each other. C. They have different boundaries. D. They have the same internal energy. Im think the answer is d.
Monday, November 17, 2014 at 12:33pm

AP Chemistry
Two objects A and B of different size are both at a temperature of 500 K and are connected by a rod (A looks four times larger than b). What will be the nature of transmission of heat? I believe there won't be a transmission of heat. Any thoughts. Here are the options A. ...
Monday, November 17, 2014 at 12:27pm

Chemistry
Help needed with a calorimeter lab. I have to measure the enthalpy of a neutralization reaction between NaOH and HCl as well as find the concentration of NaOH the following ways. - using the mass and volume of NaOH - Using calorimetric data assuming no heat lost to calorimeter...
Monday, November 17, 2014 at 12:36am

Chemistry
if 5.00 ml of 1.66x10^-1 M HCl solution is diluted to exactly 250.0 ml with water, what is the concentration of the resulting solution?
Sunday, November 16, 2014 at 11:02pm

Chemistry Buffers
Write reactions showing how each of the following buffers would neutralize added HCl. HF and NaF Express your answer as a balanced chemical equation. Identify all of the phases in your answer. HC2H3O2 and KC2H3O2 Express your answer as a balanced chemical equation. Identify ...
Sunday, November 16, 2014 at 10:09pm

Chemistry
Please also, help me set up this problem. Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is C2H2(g)+2H2(g)⇌C2H6(g). Given the following data at standard conditions (all pressures equal to 1 atm and the common ...
Sunday, November 16, 2014 at 9:51pm

Chemistry
Help me set up this problem. I have been looking at a few examples of similar problems and I keep getting the wrong answers. I'm getting really confused. Q: The standard free energy change ΔG∘ and the equilibrium constant K for a reaction can be related by the ...
Sunday, November 16, 2014 at 9:47pm

Chemistry
Please help me set up these problems. I have been staring at them for hours and I can't tell where I went wrong. Question: Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures. (...
Sunday, November 16, 2014 at 9:43pm

Chemistry
Please help me with these problems, the book examples very different. I'm really confused. Any help with these will help me immensely. Thank you in advance! What I got were: 1.)c 2.)d 3.)a 4.)c 5.)b 1.) When is any endothermic reaction spontaneous? a.)When ΔSreaction...
Sunday, November 16, 2014 at 8:56pm

Chemistry
Which of the following is NOT true for ΔGrxn? A.) If ΔG°rxn > 0, the reaction is spontaneous in the forward direction. B.) If Q = 1, then ΔGrxn = ΔG°rxn.If ΔG°rxn = 0, the reaction is spontaneous in the reverse direction. C.) If ΔG&...
Sunday, November 16, 2014 at 8:55pm

Science, Chemistry
Write neutralization reactions for each of the following acids and bases. HNO3(aq) and Ba(OH)2(aq) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
Sunday, November 16, 2014 at 8:39pm

Chemistry
If a solution contains 0.65mol of OH−, how many moles of H+ would be required to reach the equivalence point in a titration?
Sunday, November 16, 2014 at 8:01pm

Chemistry
Which bond in urea is most polar? (P.S. I tried C-O and N-C-O, but it's incorrect)
Sunday, November 16, 2014 at 7:51pm

Chemistry
what does the Lewis Dot Structure of Sr(CN)2 look like?
Sunday, November 16, 2014 at 7:18pm

chemistry
Consider the reaction, 3 H2(g) + N2(g) => 2 NH3(g). How many grams of NH3 will be made by the reaction of 3 moles of H2(g) with 18 moles of N2(g
Sunday, November 16, 2014 at 6:47pm

chemistry
Consider the following reaction: 2 B5H9 + 12 O2 => 5 B2O3 + 9 H2O How many grams of B2O3 are made by the reaction of 233.8 g of O2
Sunday, November 16, 2014 at 6:47pm

chemistry
Consider the following reaction: 2 B5H9 + 12 O2 => 5 B2O3 + 9 H2O How many grams of O2 are needed to make 432.7 g of H2O?
Sunday, November 16, 2014 at 6:47pm

chemistry
2.15 g of a substance X contain 4.34 x 1022 molecules of X. Calculate the molar mass of X in g/mol.
Sunday, November 16, 2014 at 6:46pm

chemistry
Consider the equation: N2 + 3 H2 =>2 NH3. How many moles of NH3 will be made from 4.2 x 1023 molecules of N2? Give your answer to one decimal place.
Sunday, November 16, 2014 at 6:46pm

chemistry
Consider the equation: N2 + 3 H2 =>2 NH3. How many moles of NH3 will be made from 2.1 x 1024 molecules of N2?
Sunday, November 16, 2014 at 6:44pm

chemistry
Consider the reaction, 4 NH3 + 5 O2 => 4 NO + 6 H2O How many grams of NO will be made from 10.7 moles of O2?
Sunday, November 16, 2014 at 6:30pm

Chemistry
Assume you are performing the calibration step of Experiment 8 and you begin with 50 g of water at 20 oC and 50 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the ...
Sunday, November 16, 2014 at 6:11pm

Chemistry
How many moles of CO2 will be made from 115.4 grams of C3H8?
Sunday, November 16, 2014 at 5:55pm

chemistry
100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density is 1.25g/ml 50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solutions are mixed. Molarity of cl ions in the resulting solution ...
Sunday, November 16, 2014 at 4:42pm

Chemistry
Estimate the percent ionic character of the BrF bond using this graph:
Sunday, November 16, 2014 at 4:34pm

Chemistry (Acid&Base)
How many mL of 0.203 M HCl(aq) are required to prepare a diluted solution that has a concentration of 0.0433 M in a 100-mL volumetric flask?
Sunday, November 16, 2014 at 4:10pm

chemistry Ben
50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solutions are mixed. molarity of cl ions in the resulting solutions is At.wt of ba = 137 100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final...
Sunday, November 16, 2014 at 3:00pm

chemistry step by step for me
100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density is 1.25g/ml. 50ml of 20.8% bacl2 and 100ml of 938% h2s04 solutions are mixed. Molarity of cl ions in the resulting solutions...
Sunday, November 16, 2014 at 2:35pm

Chemistry
Consider the reaction 2 SO2(g) + O2(g) in equilibrium with 2 SO3(g) . At 25°C delta H° = -197.78 kJ and delta S° = -187.95 J/K. Using this information, calculate the equilibrium constant for the reaction at -32°C. (R = 8.314 J/K) Enter your answer using TWO ...
Sunday, November 16, 2014 at 2:11pm

Chemistry
Are there any chemical reactions or observations that involve sodium hydroxide or any other bases, but cannot be used to confirm its basic nature?
Sunday, November 16, 2014 at 6:25am

Chemistry
Write a balanced formula equation with phase indicators: Strong heating of copper(II) nitrate trihydrate produces copper (II) oxide, nitrogen dioxide, oxygen gas, and water (The part I'm confused about is how to write the molecular formula for copper (II) nitrate ...
Sunday, November 16, 2014 at 6:05am

Chemistry
8.5g of sample of iron required just 75cm3 of 3.00M HCl to dissolve it and give a neutral solution.Calculate the percentage purity of the sample of iron.
Sunday, November 16, 2014 at 5:50am

Chemistry
Suppose that 0.205 g of a mixture containing Na2SO4 and K2SO4 is dissolved in water. An excess of BaCl2 is added and a precipitate of 0.298 g of BaSO4 is produced. Calculate the percent by mass of Na2SO4 and K2SO4 in the original mixture.
Saturday, November 15, 2014 at 9:24pm

Chemistry
Suppose that 50.0 mL of a 0.250 M HCl solution is mixed with 50.0 mL of a 0.100 M Ba(OH)2 solution in a coffee-cup calorimeter. The temperature of the resulting solution increases by 1.76 oC . Calculate DH for the reaction between HCl (aq) and Ba(OH)2 (aq) in kJ per mole of Ba...
Saturday, November 15, 2014 at 9:23pm

Chemistry
Consider the following reaction AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq) DH = -66 kJ Suppose that 100.0 mL of 0.100M AgNO3 is added to 200.0 mL of 0.100 M NaCl in a coffee cup calorimeter. Assuming that the initial temperature of the solution is 25.000C calculate ...
Saturday, November 15, 2014 at 7:03pm

Chemistry
Suppose that 1.048 g of benzene is combusted in a bomb calorimeter which contains 945 g of water. The temperature of the water increases from 23.640 OC to 32.681 oC. The heat capacity of the empty calorimeter is 891 J/ OC . C6H6 (l) + 15/2 O2 (g) > 3 H2O (l) + 6 CO2 (g) (a...
Saturday, November 15, 2014 at 7:02pm

Chemistry
In order to calibrate a bomb calorimeter , 3000 g of water is added to the calorimeter. next, 1.08 x 10-2mol of ethanol (C2H6O) is combusted in the presence of excess oxygen according to the equation, C2H6O (l) + 3 O2 (g) > 3 H2O (l) + 2 CO2 (g) DE = - 1365 kJ/mol . ...
Saturday, November 15, 2014 at 7:02pm

Chemistry
The standard enthalpy of formation of H2O (l) is -285.8 kJ/mol. Calculate ∆E° for the following reaction. H2O (l) → H2 (g) + 1/2 O2 (g)
Saturday, November 15, 2014 at 7:00pm

Chemistry
The standard enthalpy of formation of H2O (l) is -285.8 kJ/mol. Calculate DEO for the following reaction. H2O (l) → H2 (g) + 1/2 O2 (g)
Saturday, November 15, 2014 at 6:58pm

Chemistry
Identify the intermolecular attractive force(s) that must be overcome to vaporize CH3Cl(l).
Saturday, November 15, 2014 at 4:23pm

chemistry
If we assume that the energy-level diagrams for homonuclear diatomic molecules shown in Figure 9.42 in the textbook can be applied to heteronuclear diatomic molecules and ions, predict the bond order and magnetic behavior of CO+
Saturday, November 15, 2014 at 3:33pm

Chemistry
What is the molar mass of a gas (96.0 g) in a 25.0 L container at 27.0 °C? The pressure inside the container is 3.04E5 Pa.
Saturday, November 15, 2014 at 2:39pm

chemistry
How many joules of energy would be liberated by condensing 49.6 mol of steam at 100.0 °C and allowing the liquid to cool to 30.0 °C?
Saturday, November 15, 2014 at 2:31pm

chemistry
How many grams of the nonelectrolyte sucrose (molar mass -342 g / mole) must be added to 450 grams of water (molar mass 18.0 g / mole) to change the vapor pressure to 745 mm Hg at 100
Saturday, November 15, 2014 at 1:56pm

chemistry
If 124 g of ice at 0.0°C is added to 1.36 L of water at 90 °C, what is the final temperature of the mixture?
Saturday, November 15, 2014 at 1:10pm

chemistry
Exactly .203g of zinc metal is dissolved in dilute HCl(aq) in an ice calorimeter. The heat released melts enough ice to produce a volume change of 0.254mL in the ice water mixture surrounding the reaction vessel. Calculate the enthalpy change per mole of zinc for the reaction...
Saturday, November 15, 2014 at 1:07pm

chemistry
1. In an ice calorimeter experiment, what is the relationship between joules and volume change expressed in joules/mL of volume change? a.) The specific volume of H20(l) is 1.001mL/g b.) The specific volume of H2)(s) is 1.092mL/g c.) The latent heat of fusion of ice is 334 J/g...
Saturday, November 15, 2014 at 1:06pm

chemistry
Calculate the amount of heat absorbed when 58 g of steam at 117◦C are completely converted to ice at −32.5◦C. Specific Heat: H2O(s) = 2.09 J/g◦C H2O(l) = 4.18 J/g◦C H2O(g) = 2.03 J/g◦C Heat of Fusion = 334 J/g Heat of Vaporization = 2260 J/g...
Saturday, November 15, 2014 at 12:21pm

Chemistry
If 9560 J of energy were absorbed by 500. g of ice at 0.0 °C, what would be the final temperature? Can someone walk me through setting this up?
Saturday, November 15, 2014 at 11:44am

chemistry
The complete combustion of ethanol, C 2 H 5 OH (FW = 46.0 g/mol ), proceeds as follows: What is the enthalpy change for combustion of 15.0 g of ethanol?
Saturday, November 15, 2014 at 11:09am

chemistry
The tomato is dropped. What is the velocity, v , of the tomato when it hits the ground? Assume 91.9% of the work done in Part A is transferred to kinetic energy, E , by the time the tomato hits the ground.
Saturday, November 15, 2014 at 10:49am

Chemistry
In an experiment, a mixture of two gases occupies a volume of 3.00 L at a temperature of 22.5 degree centigrade. The mixture contains 14.0 g of water, 11.5 g of oxygen, and 37.3 g of nitrogen. Calculate the total pressure and the partial pressure of each gas?
Saturday, November 15, 2014 at 3:40am

Chemistry
N2O5 is an unstable gas that decomposes according to the following reaction: 2N2O3(g) ---> 4NO2(g) + O2(g) What would be the total pressure of gases present if a 10.0L container at 22.0 degree centigrade begins with 0.400 atm of N2O5 and the gas completely decomposes?
Saturday, November 15, 2014 at 3:37am

Chemistry
One way to generate oxygen is to heat potassium chlorate, KCLO3 (the other product is potassium chloride). If 386 mL of oxygen at 41 degree centigrade and 97.8 kPa is generated by this reaction, what is the minimum mass of KCLO3 used?
Saturday, November 15, 2014 at 3:33am

Chemistry
A sample of a smoke stack emission was collected into a 1.25L tank at 752 mm Hg and analyzed. The analysis showed 92% CO2, 3.6% NO, 1.2% SO2, and 4.1% H2O by mass. What is the partial pressure exerted by each gas?
Saturday, November 15, 2014 at 3:22am

Chemistry
A sample of a smoke stack emission was collected into a 1.25 L at 752 mm Hg and analyzed. The analysis showed 92% CO2, 3.6% NO, 1.2% SO2, and 4.1% H2O by mass. What is the partial pressure exerted by each gas?
Saturday, November 15, 2014 at 3:21am

Chemistry
For a gas sample whose total pressure is 740 torr, what are the partial pressures if the moles of gas present are 1.3 mol N2, 0.33 mol O2, and 0.061 mol Ar?
Saturday, November 15, 2014 at 3:18am

Chemistry
A cylinder containing 15.0 L of helium gas at a pressure of 165 atm is to be used to fill party balloons. Each balloon must be filled to a volume of 2.0 L at a pressure of 1.1 atm. What is the maximum number of balloons that can be inflated? Assume that the gas in the cylinder...
Saturday, November 15, 2014 at 3:16am

Chemistry
What is the molarity of a solution prepared by dissolving 820. g of sodium phosphate, Na3PO4, in water and diluting to 2.89 liters? (atomic masses: Na = 22.99, P = 30.97, O = 16.00)
Friday, November 14, 2014 at 10:56pm

chemistry (AP)
The heat of neutralization of HCl (aq) by NaOH is -55.9Kj/mol H2) produced. If 50ml of 1.6M NaOH at 25.15 celsius is added to 25ml of 1.79M HCl at 26.34 celsius in a plastic foam cup calorimeter, what will be solution temperature be immediately after the neutralization ...
Friday, November 14, 2014 at 9:52pm

chemistry
Assuming 100% dissociation, calculate the freezing point and boiling point of 0.700 mol of AgNO3 in 1.00 kg of water.
Friday, November 14, 2014 at 9:17pm

Chemistry
How many electrons can be described by the quantum numbers n = 2, l = 1, ml = -1? a.) 2 b.) 14 c.) 6 d.) 10 e.) 0 I thought it was 6 but here's my reasoning n = 2 energy levels l = 1 (p orbital) ml = -1 (I don't think this is relevant to the question?)
Friday, November 14, 2014 at 9:13pm

Chemistry
A 0.327 g sample of a mixture of NaOH(s) and NaCl(s) requires 31.5 mL of 0.150 M HCl(aq) to react with all the NaOH(s). What is the mass percentage of the NaOH(s) in the mixture?
Friday, November 14, 2014 at 3:39pm

Chemistry
What is the minimum amount of 6.0M H2SO4 necessary to produce 19.0g of H2(g) according to the reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H​2(g)
Friday, November 14, 2014 at 2:12pm

chemistry
How can we draw one of the shapes of molecule according to the VSEPR theory which is SO2?
Friday, November 14, 2014 at 9:05am

chemistry
what is the structure of OF anion?
Friday, November 14, 2014 at 5:32am

chemistry
You perform the following titration: You placed 35 mL of H2S in a flask and placed it under a buret. The buret contains 0.243M Sr(OH)2 and you are going to titrate the H2S with the base. You titrate until the color changes. At that point, you record that you used 10.15mL of ...
Friday, November 14, 2014 at 1:20am

chemistry
addition of 1.280g of zinc metal to 100mL of 0.3917 M HCl in a coffee-cup calorimeter causes the temperature to increase from 1 degrees celsius to 22.11 degrees celsius. What is the value of the change of Hrxn for the following equation: Zn(s) + 2HCl(aq)-->ZnCl2(aq) +H2(g) ...
Thursday, November 13, 2014 at 11:08pm

Chemistry
A) n=1 l=0 ml=0 ms=1/2 B) n=3 l=1 ml=-1 ms=1/2 C) n=2 l=0 ml=0 ms=-1/2 D) n=2 l=1 ml=0 ms=1/2 E) n=3 l=2 ml=0 ms=1/2 F) n=2 l=1 ml=1 ms=-1/2 Which of the above sets of quantum numbers could possibly describe an electron in the ground-state configurations of sulfur
Thursday, November 13, 2014 at 10:19pm

chemistry
How many formula units would there be in a 54.3 gram sample of sodium nitrate
Thursday, November 13, 2014 at 10:09pm

chemistry
how does one find out the moles of NaCl?
Thursday, November 13, 2014 at 9:28pm

Chemistry
I missed a few days of school due to a sick child. I'm reviewing for an exam and the following questions are giving me trouble as I wasn't there when they were reviewed in class. If possible, I need the answer and step-by-step process so I can see what what to do and ...
Thursday, November 13, 2014 at 9:15pm

Chemistry
I missed a few days of school due to a sick child. I'm reviewing for an exam and the following questions are giving me trouble as I wasn't there when they were reviewed in class. If possible, I need the step-by-step process. Thanks. 1.) If you put hydrogen peroxide on ...
Thursday, November 13, 2014 at 7:25pm

chemistry
What is the balance chemical equation for calcium sulfate and potassium phosphate to form potassium sulfate and calcium phosphate
Thursday, November 13, 2014 at 7:17pm

chemistry
A gas mixture is composed of 4.3 grams of hydrogen (density at STP = 0.089 g/L) and 2.9 grams of helium (density at STP = 0.179 g/L). What is the percentage (v/v) helium in the mixture? If v/v = Volume of gas/total volume how would we find the volume of both of the gases?
Thursday, November 13, 2014 at 6:59pm

Chemistry 11
A hydrate of zinc chlorate, Zn(ClO3)2 .xH2O(s) contains 21.5% zinc by mass. Find the value of x. What I've done: Molar mass of Zn: 65.409 g/mol Molar mass of Cl: 2*35.453 =70.906 g/mol Molar mass of O: 6*15.9994 =95.9964 g/mol Total molar mass of Zn(ClO3)2: 232.3114 g/mol ...
Thursday, November 13, 2014 at 6:50pm

chemistry
How much work is done when a 175g tomato is lifted 14.7m?
Thursday, November 13, 2014 at 6:12pm

chemistry
How many liters of CO2 gas are contained in a 3.16 liters of a gas mixture which is 8.1% (v/v) CO2? They never gave us the formula or a process to figure this out in class. Will you please help?
Thursday, November 13, 2014 at 5:32pm

chemistry
How many grams of O2 are contained in a 25.0L sample at 5.20 atm and 28.0C?
Thursday, November 13, 2014 at 5:10pm

Chemistry
2HI <==> H2 + I2 Keq = 81.0 A 2.00L container is initially filled with 400 mol HI. Calculate the [HI] at equilibrium. This is what I did so far... HI = 4.00/2 = 2M ___2HI___<==>___H2___I2_ I 2.0M_________----__---- C -2X___________X_____X__ E 2-...
Thursday, November 13, 2014 at 2:09pm

Chemistry (Equilibrium)
At high temperature, 0.500 mol of HBR was placed in a 1.00L container where it decomposed to give the equilibrium: 2HBr <==> H2 + Br2 At equilibrium, the [Br2] is 0.0855 mol/L. What is the value of the equilibrium constant? My work: ..2HBr <==> H2 + Br2 I 0.500M...
Thursday, November 13, 2014 at 5:51am

chemistry
At what temperature will freeze rastor 48.8 g of ethanol C2H5OH (Mr = 46) in dm3 of water (p = 1.86)
Thursday, November 13, 2014 at 5:25am

chemistry
why do we use the limiting reactant data to calculate delta h? why might it be important to know delta h prior to running a reaction?
Thursday, November 13, 2014 at 3:39am

Chemistry
0.100 moles of NaOH are combined with 0.125 moles acetic acid. The mixture is taken to a final volume of 100.00 ml. What is the expected pH of the solution? Use Ka for acetic acid of 1.76 x 10^-5
Thursday, November 13, 2014 at 12:40am

Chemistry
20.0 ml of 1.00 M formic acid are combined with 10.0 ml of 1.00 M sodium formate. Calculate the expected pH. Ka for formic acid is 1.77 x 10^-4
Thursday, November 13, 2014 at 12:37am

Chemistry (Equilibrium)
Consider the following equilibrium system at 900°C: H20(g) + CO(g) <==> H2(g) + CO2(g) Initially 5.0 moles of H2O and 4.0 moles of CO were reacted. At equilibrium, it is found that 2.0 moles of H2 are present. How many moles of H2O remain in the mixture? Would be ...
Wednesday, November 12, 2014 at 9:15pm

chemistry
Which sample has the most solute? Question 15 options: 200. mL of 0.200 M MgCl2 150. mL of 0.250 M MgCl2 100. mL of 0.300 M MgCl2 100. mL of 0.250 M MgCl2
Wednesday, November 12, 2014 at 7:49pm

chemistry
{V1} mL of 0.100 M HCl is placed in a {V2}.0 mL volumetric flask and water is added to bring the final volume up to 250.0 mL. What is the molarity of the dilute solution?
Wednesday, November 12, 2014 at 7:48pm

chemistry
How much CaCl2 (MM = 111.0 g/mol) would you weigh out to prepare 325. mL of 0.150. M CaCl2?
Wednesday, November 12, 2014 at 7:48pm

chemistry
23.9 g of CaCl2 (MM = 111.0 g/mol) is dissolved in enough water to make 300. mL of solution. What is the molarity of the solution?
Wednesday, November 12, 2014 at 7:47pm

Chemistry 11
Find the percent composition of a compound containing sodium and chlorine if 24.34g of the compound contains 13.45g of sodium. My work: Molar mass of NaCl: MNa +MCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol Percent composition of Na: 22.99 g/mol / 58.44 g/mol x 100 = 39.34% Na...
Wednesday, November 12, 2014 at 7:17pm

chemistry
The reaction SO2 + H2O =H2SO4 Is the last step in the commercial production of sulfuric acid . the enthalpy change for this reaction is -227 KJ . In designing a sulfuric acid plant is it necessary to provide for heating or cooling of the reaction mixture ? explain
Wednesday, November 12, 2014 at 6:35pm

Chemistry
Consider the following equilibrium: 2HI(g) *are in equilibrium with* H2(g) = I2(g) Keq = 81.0 A 2.00L container is initially filled with 4.00 mol HI. Calculate the [HI] at equilibrium. *I don't know how to put the equilibrium sign on the computer* Can someone please ...
Wednesday, November 12, 2014 at 6:35pm

Chemistry
What is the molar mass of 0.500 g of unknown monoprotic acid used in titration, if 22.5 mL of 0.15 M NaOH solution was required to neutralize it? I do not need the answer, but instead an example of how to do a question just like it.
Wednesday, November 12, 2014 at 5:11pm

Chemistry
1. what type of covalent bonded liquid will a polar covalent solid dissolve in? (hint like dissolves like) 2. what type of covalent bonded liquid will a non polar covalent solid dissolve in? (hint like dissolves like) 3. In what type of solvent will a polar solute dissolve? In...
Wednesday, November 12, 2014 at 5:06pm

Chemistry
0.05 L of chlorine gas is bubbled through 0.5 L of 2 M sodium Bromide solution. -What type of reaction is this ? A) Single Replacment B) Double Replacement C) Synthesis D) Decomposition E) Combustion - What product(s) will be predicted for this reaction? (bubble all that apply...
Wednesday, November 12, 2014 at 4:49pm

chemistry
2.9 in3 of mercury to its volume in milliliters and its mass in kilograms
Wednesday, November 12, 2014 at 4:41pm

chemistry
calculate the amount of heat released when 77.0g of steam at 104.5 celsius cools to ice at 0.0 celsius. I don't understand the steps to take to solve this problem. Can someone walk me through it please?
Wednesday, November 12, 2014 at 4:32pm

chemistry
263 mL ethanol to its mass in grams
Wednesday, November 12, 2014 at 4:29pm

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