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May 25, 2015

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

chemistry
Lead iodide is a relatively insoluble compound. It can dissolve from the solid phase into the aqueous phase with a Keq of 0.00027. If the concentration of lead iodide in the aqueous phase 0.125 M, then: a. we need more information to determine the progress of the reaction. b. ...
Saturday, February 28, 2015 at 6:39pm

chemistry
Equilibrium is: a dynamic condition in which the concentration of the reactants is equal to the concentration of the products. a static condition in which the concentration of the reactants is equal to the concentration of the products. a static condition in which the rate of ...
Saturday, February 28, 2015 at 6:38pm

chemistry
Hi Please ... is the absolute temperature equal temperature in kelvin? Thanks for you
Saturday, February 28, 2015 at 3:57pm

Chemistry
Acetone is one of the most important solvents in organic chemistry, used to dissolve everything from fats and waxes to airplane glue and nail polish. At high temperature, it decomposes in a first order process to methane and ketene (CH2=C=O).At 600C, the rate constant is 8....
Saturday, February 28, 2015 at 2:02pm

Chemistry
Even when a mechanism is consistent with the rate law , later experimentation may it to be incorrect or only one of several alternative. As an example, the reaction between hydrogen and iodine has the following rate law: rate=k[H]^3[I]2. The long accepted mechanism proposed a ...
Saturday, February 28, 2015 at 1:49pm

Chemistry
At body temperature (37C), K of an enzyme-catalyzed reaction is 2.3x10^14 times greater than k of the uncatalyzed reaction. Assuming that the frequency factor A is the same for both reaction, by how much does the enzyme the E^a?
Saturday, February 28, 2015 at 1:26pm

Chemistry
A principle of green chemistry is that the energy requirement of industrial processes should have minimal environmental impact. How can the use of catalysts lead to "greener" technology?
Saturday, February 28, 2015 at 1:20pm

Chemistry
Need Help! 1. Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g)+3H2(g)→2NH3(g)ammonia How many moles of N2 reacted if 0.65mole NH3 is produced? How many moles of NH3 are produced when 1.2moles H2 reacts? 2.In the acetylene torch, acetylene gas (C2H2) ...
Saturday, February 28, 2015 at 1:02pm

Chemistry
Define the-half of a reaction. Explain on the molecular level why the half- life of a first-order reaction is constant
Saturday, February 28, 2015 at 10:53am

Chemistry
If the temperature in problem 16.60 (25C), by what factor does the fraction of collisions with energy equal to or greater that the activation energy change?
Saturday, February 28, 2015 at 8:31am

Chemistry
Define the-half of a reaction. Explain on the molecular level why the half- life of a first-order reaction is constant
Saturday, February 28, 2015 at 8:22am

Chemistry
For the reaction 4A (g)+3B (g)=C(g) the following data were obtained at constant temperature: Experiment- 1. Initial (A) (mole/L) 0.0500, 01000, 01000 , 0.0500 2. Initial (B) (mole/L) 0.0500, 0.0500, 0.1000, 0.0500 3. Initial (C)(mole/L) 0.0100, 0.0100, 0.0100, 0.0200 Initial ...
Saturday, February 28, 2015 at 8:18am

Chemistry
You are staying the reaction A2 (g)+B2 (g)=2AB (g) To determine its rate law .Assuming that you have a valid experimental procedure for obtaining (A2)& (B2) at various times, explain how you determine (a)the initial, (b) the reaction order, & (c) the rate constant?
Saturday, February 28, 2015 at 7:35am

Chemistry
Consider the uni molecular reaction cyclopropane? Propylene. The value of log A for high pressure limit is 15.17. Calculate the value of S? For the reaction. Calculate the contribution of S trans in the above reaction at 298K?
Saturday, February 28, 2015 at 7:25am

Chemistry
The magnetic moment (mu) values for Cs2 (MnCl4), k4 (Mn (CN) 6) and K2 (Ni (CN) 4) are 5.9 , 1.8 and 0 B.M, respectively. Explain the difference of these values based on the Valence bond theory.?
Saturday, February 28, 2015 at 7:18am

Chemistry
Vapour pressure of ideal solutions at 25c the vapour pressure of chloroform and carbon tetrachloride are 26.54 and 15.27 kpa respectively. If the liquids from ideal solutions. (A) what is the composition of the vapour in equilibrium with with a solution containing 1mol of each...
Saturday, February 28, 2015 at 6:57am

Chemistry
how many moles of solid mg(oh)2 should you ad to 200 ml of .15M acetic acid solution to produce ph 4.0 buffer?
Saturday, February 28, 2015 at 6:38am

Chemistry Help
How many moles of H2 and N2 can be formed by the decomposition of 0.250 mol of ammonia, NH3? Is it 0.250*3mol H2=0.75 0.25*1mol N2=0.25 Am I correct?
Saturday, February 28, 2015 at 3:39am

chemistry
50.0 mL of a solution of HCl is combined with 100.0 mL of 1.15 M NaOH in a calorimeter. The reaction mixture is initially at 22.4°C and the final temperature after reaction is 31.2°C. What is the molarity of the HCl solution? You may assume that there is an excess of ...
Saturday, February 28, 2015 at 12:49am

chemistry 2
For the simple decomposition reaction below, rate = k[AB]2 and k = 0.30 L/mols. AB(g) A(g) + B(g) If the initial concentration of AB is 1.20 M, what is [AB] after 10.0 s?
Saturday, February 28, 2015 at 12:39am

Chemistry
Phosphorous acid, H3PO3, is actually a diprotic acid for which Ka1 = 5.0 × 10-2 and Ka2 = 2.0 × 10-7. What are the values of [H+] and [H2PO3-] in a 2.0 M solution of H3PO3?
Friday, February 27, 2015 at 11:37pm

Chemistry
Calculate the pH of a 0.033 M solution of sodium ascorbate, Na2C6H6O6. For ascorbic acid, H2C6H6O6, Ka1 = 7.9 × 10-5 and Ka2 = 1.6 × 10-12. Kb = 1E-14 / 7.9E-5 = 1.266E-10 I 0.033 0 0 C -x +x +x E 0.033-x x x x^2/-0.033 = 1.266E-10 x = 2.044E-6 pOH= -log(2.044E-6...
Friday, February 27, 2015 at 11:28pm

Chemistry
I'm having a brain malfunction... how to calculate how many grams are in a mole of something? How many grams are in 3.80mol of sodium chloride (NaCl)?
Friday, February 27, 2015 at 11:18pm

Chemistry
A reaction proceeds with ∆ H = 40 kJ/mol. The energy of activation of the uncatalyzed reaction is 120 kJ/mol, whereas i t is 55 kJ/mol for the catalyzed reaction. How many times faster is the catalyzed reaction than the uncatalyzed reaction at 25°C?
Friday, February 27, 2015 at 10:43pm

Chemistry Help
How many milliliters of 0.534 M Ba(OH)2 solution are needed to completely neutralize 34.5 mL of 0.220 M HBr solution? The reaction is Ba(OH)2(aq) + 2HBr(aq) → BaBr2(aq) + 2H2O(l) I did 0.0345 * 0.220 = 0.00759 Moles of HCl =2*0.00759= 0.01518 0.01518*1000= 15.18 mL ...
Friday, February 27, 2015 at 10:36pm

Chemistry
Calculate the hydrogen ion concentration, [H+], in 0.00988 M Ba(OH)2. Careful!
Friday, February 27, 2015 at 10:35pm

Chemistry
The autodissociation of water to H+ and OH- is endothermic. At a higher temperature more of the water molecules have sufficient energy to dissociate. So, Kw is greater. At 25oC, Kw = 1.0 x 10-14. (standard Kw) At 65oC, Kw = 1.0 x 10-13. Calculate the hydrogen ion concentration...
Friday, February 27, 2015 at 10:33pm

Chemistry
Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g)+3H2(g)→2NH3(g)ammonia How many moles of N2 reacted if 0.65mole NH3 is produced? How many moles of NH3 are produced when 1.2moles H2 reacts?
Friday, February 27, 2015 at 9:37pm

Chemistry
Ok, I know how to balance chemical equations, however, I don't know how to tell if it is a S, L, aq, or g? How am I supposed to know this?? Mg(s)+AgNO3(aq)→Mg(NO3)2(aq)+Ag(s)​ Express your answer as a chemical equation. Identify all of the phases in your answer...
Friday, February 27, 2015 at 8:55pm

Chemistry
Dr. Bob222, Calculate the moles of C2H6 in 8.60×1023 molecules of C2H6. I did what you said, I got 8.60*10^23*(1mole/6.02*10^23) = 1.43*10^46??? This is not the answer.. am I doing something wrong?
Friday, February 27, 2015 at 8:34pm

Chemistry
UMM.. I keep coming up with the wrong answer? How do I calculate this? 1. Calculate the number of Li atoms in 9.9 moles of Li. Express your answer using two significant figures. 2. Calculate the number of CO2 molecules in 3.13×10−2 mole of CO2. 3.Calculate the ...
Friday, February 27, 2015 at 8:03pm

chemistry
how do i plot the gibbs isotherm equation in excel given concentration and surface tension? I'm looking for surface excess which is the slope on the graph, the equation is r=1/RT(dST/dln(c)), ST is the surface tension. Do I plot the ln of the concentration versus the ...
Friday, February 27, 2015 at 7:03pm

Chemistry
Determine the percent ionization of a 2.45 M solution of benzoic acid
Friday, February 27, 2015 at 6:53pm

Chemistry
Using a 0.20 M phosphate buffer with a pH of 6.7, you add 0.71 mL of 0.55 M HCl to 52 mL of the buffer. What is the new pH of the solution?
Friday, February 27, 2015 at 3:40pm

Chemistry
You are instructed to create 200. mL of a 0.27 M phosphate buffer with a pH of 7.8. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l) equilibrium reaction arrow ...
Friday, February 27, 2015 at 3:39pm

chemistry
For the reaction: 2SO2(g) + O2(g) = 2SO3(g) conducted at 25°C and 1 atm. Calculate H°, S°, G°
Friday, February 27, 2015 at 1:43pm

Chemistry
True of False, Amorphous solids have crystal structures.
Friday, February 27, 2015 at 9:19am

Chemistry Need Help
Given the chemical equation, Cl2 + F2 2ClF, how many moles of ClF are produced in the reaction, if 1.50 moles Cl2 are made to react with 1.75 moles F2 ? I got the answer 3.50 moles but it was wrong. Can anyone help me please.
Friday, February 27, 2015 at 2:49am

Chemistry
Propanoic acid that, along with its sodium salt, can be used to make a buffer that has a pH of 5.25. If you have 532.9 mL of a 0.250 M solution of that acid, how many grams of the corresponding sodium salt do you have to dissolve to obtain the desired pH?
Friday, February 27, 2015 at 1:09am

Chemistry Help
The theoretical yield of Cl2 that could be prepared by mixing 15.0 g of manganese dioxide (MnO2) with 30.0 g of HCl is 12.2 g. The limiting reagent was MnO2. When the reaction was run only 8.82 g of Cl2 was collected. The percent yield of Cl2 is_? a)58.8 % b)72.3 % c)29.4 % d)...
Friday, February 27, 2015 at 12:55am

Chemistry
When 0.500 moles of boron trichloride react with 1.20 moles hydrogen gas to produce elemental boron and hydrogen chloride gas, the actual yield of boron was 66.4 % of the theoretical yield. The mass of boron obtained was _____ g. Please help I'm stuck on it.
Friday, February 27, 2015 at 12:28am

chemistry
Consider a sample of a hydrocarbon (a compound consisting of only carbon and hydrogen) at 0.959 atm and 298 K. Upon combusting the entire sample in oxygen, you collect a mixture of gaseous carbon dioxide and water vapor at 0.755 atm and 375 K. This mixture has a density of 0....
Friday, February 27, 2015 at 12:21am

chemistry
You made 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 84.8 mL left (the rest had evaporated). In addition, you forgot the initial concentration of the solution. You decide to take 2.00 mL of the ...
Thursday, February 26, 2015 at 11:35pm

chemistry
The rate of removal of Aspirin from the body is a first order reaction with a rate constant,k = 0.34/h How long does it takes for 87.5% of Aspirin to be removed from the body?
Thursday, February 26, 2015 at 11:03pm

chemistry
Sodium nitrate reacts with copper (II) hydroxide. I know how to write it down: NaNo3+CuOH2----> NO REACTION The problem is that I don't understand why it's no reaction I know it's double replacement and we have to look at activity series of metal to figure out ...
Thursday, February 26, 2015 at 10:56pm

Chemistry help
2. How would it be affective if there were a lot of saliva left in the gum after chewing?
Thursday, February 26, 2015 at 9:46pm

Chemistry, HELP!
Molybdenum (Mo) is a heavy metal that can have severe health effects on humans and animals. Tailings from a mining operation in Colorado have polluted surface waters used by grazing animals with Mo. Based on the following information determine the concentration of the three Mo...
Thursday, February 26, 2015 at 9:10pm

Quick chemistry help
How would I find the number of atoms in this mole statement? 12 molecules chlorine gas=_______ atoms of Cl
Thursday, February 26, 2015 at 8:19pm

Chemistry Equilibrium
1.15 g oh h2O (density 1.00 g/ml) is introduced into an empty 1.00 L container. The seled container is heated to 412 K and .150 moles of O2 (g) is present at equilibrium. A. Wrte the equilibrium expression for the reaction above. B. Calculate the equilibrium concentration (in ...
Thursday, February 26, 2015 at 6:16pm

Chemistry to DrBob222
DrBob222 You are an amazing person! I have received more help from you the past two days that I have this whole semester from my instructor! You have an amazing gift of breaking things down to understand completely! Where are you from? Do you get paid for this somehow? look me...
Thursday, February 26, 2015 at 5:11pm

solution making/ chemistry/biotech
You have 750ml's of a solution that was originally made up using a 20X stock. How much stock was used? I think the answer is 37.5 by dividing 750/20 but I am not sure
Thursday, February 26, 2015 at 3:00pm

chemistry
why does HF have a boiling point of 19°c and H2O 100°c
Thursday, February 26, 2015 at 2:30pm

Chemistry
Ok, Need some more help... This is what I have so far. 4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. molar mass:NH3=17 CO2=44 CO(NH2)2=60.1 a. (10 points) Write a ...
Thursday, February 26, 2015 at 11:02am

Chemistry Drbob222
Dr. Bob222 Please don't get frustrated with me, I'm really trying to figure this out... UGH!! I'm starting over again... Please advise... . Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were ...
Thursday, February 26, 2015 at 11:01am

Chemistry! Please Help!
Lime (CaO) is used to prevent SO2 from escaping smokestacks of coal burning power plants by the formation of solid CaSO4•2H2O also known as the mineral gypsum. One of the important reactions in the overall process is the dissociation of CaCO3(s). b. If a 12.0 g sample of ...
Thursday, February 26, 2015 at 10:04am

Chemistry
Ok, Need some more help... This is what I have so far. 4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. molar mass:NH3=17 CO2=44 CO(NH2)2=60.1 a. (10 points) Write a ...
Thursday, February 26, 2015 at 2:01am

Chemistry
Dr. Bob222 Please don't get frustrated with me, I'm really trying to figure this out... UGH!! I'm starting over again... Please advise... . Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were ...
Thursday, February 26, 2015 at 1:23am

Chemistry
A volume of 80.0mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.20 ∘C , what is the mass of the steel bar? Use the following values: specific heat of ...
Wednesday, February 25, 2015 at 11:10pm

chemistry
a mixture of NaCl and sucrose that has a combined mass of 10.20g is dissolved in enough water to make up to a 250mL solution. osmotic presdure of solution is 7.32atm at 23℃. calculate the mass percent of NaCl
Wednesday, February 25, 2015 at 11:03pm

Chemistry
Make 50.0 mL of a 0.500 M solution of acetic acid (CH3COOH) from the 1.00 M CH3COOH using a 50.0 mL graduated cylinder. 1. Show your calculations and explain how you made the acetic acid solution.
Wednesday, February 25, 2015 at 10:44pm

chemistry
A sample of oxygen that occupies 2.5 × 10−6 mL at 508 mm Hg is subjected to a pressure of 1.2 atm. What will the final volume of the sample be if the temperature is held constant? Answer in units of mL
Wednesday, February 25, 2015 at 9:22pm

Quick chemistry check
Please check each of these mole statements. Correct me if I'm wrong! 1. 59g of hydrochloric acid (HCL)=____moles I got 1.6 moles 2. 4.6 moles of sodium hydroxide (NaOH)=___ grams I got 184 grams 3. 35.0 of sulfuric acid (H2SO4)=__ f.u sulfuric acid I got 2.15x10^25th power...
Wednesday, February 25, 2015 at 9:06pm

Chemistry help
given 2.01x10^23power molecules of carbon dioxide, how many moles of co2 do you have? How many grams of carbon dioxide would this be? I need help!!
Wednesday, February 25, 2015 at 8:57pm

Quick chemistry check
Indicate whether each of the following statements is true or false. 1. One mole of NH3 weighs more than one mole of H2O IS this false 2. There are equal numbers of hydrogen atoms in one mole of H2 and one mole of H20. Is this true? 3. There are more hydrogen atoms in 2 moles ...
Wednesday, February 25, 2015 at 8:35pm

chemistry
Hydrogen fluoride has a boiling point of 19 degree Celsius whereas water has a boiling point of 100 degree Celsius...... Explain
Wednesday, February 25, 2015 at 7:54pm

chemistry
The following equilibrium exists in a closed container: N2(g) + O2(g) = 2NO(g), ΔH = +181 kJ/mol. Which of the following perturbations would favor the formation of NO(g)? (practice MCAT question from The Princeton Review MCAT Science Workbook, 2009 edition) increasing the...
Wednesday, February 25, 2015 at 7:51pm

chemistry
What volume of oxygen gas can be collected at 0.565 atm pressure and 48.0◦C when 42.9 g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆−−−−͛​4;2KCl(s) + 3O2(g) MnO2
Wednesday, February 25, 2015 at 7:06pm

chemistry
Suppose you have the following reaction at equilibrium: N2(g) + 3H2(g) = 2NH3(g), ΔH = −22 kcal/mol What changes are expected to occur if the temperature of the system was decreased. You may select multiple answers. The concentration of NH3(g) would decrease The ...
Wednesday, February 25, 2015 at 6:58pm

chemistry
1) C2H2O4(aq) = H+ (aq) + C2HO4- (aq); Keq = 6.5E-2 2) C2O42- (aq) + H+ (aq) = C2HO4- (aq); Keq = 1.64E+4 then what is the equilibrium constant for the following reaction: C2H2O4(aq) = 2H+ (aq) + C2O42- (aq)? Keq = 1070 Keq = 227 Keq = 2.21E-4 Keq = 3.96E-6 Keq = 6.30E-3
Wednesday, February 25, 2015 at 6:46pm

Chemistry Pre-AP
What volume of oxygen gas can be collected at 0.565 atm pressure and 48.0◦C when 42.9g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆−−−−͛​4;2KCl(s) + 3O2(g) MnO2
Wednesday, February 25, 2015 at 6:45pm

Chemistry
What volume of oxygen gas can be collected at 0.565 atm pressure and 48.0◦C when 42.9 g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆−→MnO2 2KCl(s) + 3O2(g)
Wednesday, February 25, 2015 at 6:27pm

chemistry
How much H2 gas at STP can be produced by the reaction 2 Na(s) + 2 H2O(ℓ)heat−→ H2(g) + 2 NaOH(aq) of 3.90 g of Na and excess water? Answer in units of L.
Wednesday, February 25, 2015 at 6:13pm

Chemistry
A solution that contains a large amount of salt and a small amount of water is said to be a _______ solution. A. unsaturated B. saturated C. dilute D. concentrated im pretty sure its C
Wednesday, February 25, 2015 at 6:09pm

Chemistry
Are solutions of the following salts acidic, basic, or neutral? For those that are not neutral, write balanced chemical equations for the reactions causing the solution to be acidic or basic. a.C5H5NHCLO4 b.NH4NO2 c.KOCL d.NH4OCL
Wednesday, February 25, 2015 at 6:07pm

chemistry
The pollutant NO is formed in diesel engines. The reaction fixes atmospheric nitrogen with oxygen to form NO. The reaction is: N2(g) + O2(g) = 2NO(g). If the equilibrium constant for this reaction at elevated temperatures is 5.60E-11, then what is the partial pressure of NO ...
Wednesday, February 25, 2015 at 6:06pm

Chemistry
The statement "matter can be neither created nor destroyed by chemical means, but it can be changed from one form to another" is the chemical law of A. definite proportions. B. atomic disintegration. C. conservation of energy. D. conservation of matter. im not sure ...
Wednesday, February 25, 2015 at 5:41pm

CHEMISTRY
Someone please tell me if I'm doing this right... It's due tonight!! Dr. Bob222, Yesterday I posted a question and you answered me with how to calculate it.. Can you tell me if I'm doing this correctly?? Please! Consider the following chemical equation: TiCl4(g) + ...
Wednesday, February 25, 2015 at 5:29pm

Chemistry
Dr. Bob222, Yesterday I posted a question and you answered me with how to calculate it.. Can you tell me if I'm doing this correctly?? Please! Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were reacted ...
Wednesday, February 25, 2015 at 5:10pm

chemistry
Why is it that hf has a boiling point of 19°c while h2o has a boiling point of 100°c?
Wednesday, February 25, 2015 at 4:44pm

Chemistry
Can someone help me with this question? This could help me with how to do another question, similar to this, for my homework. 1.Estimate the pH of (a) 0.15 M NAHSO3 (aq) (b) 0.050 M NaHSO3 (aq) Thank you!
Wednesday, February 25, 2015 at 4:28pm

Chemistry
a 100 g sample of ice at -15 degrees celsius is heated until it is converted to water vapour at 120 degrees celsius what is the energy change?
Wednesday, February 25, 2015 at 4:15pm

Organic Chemistry
Looking down C2-C3 of 2-methylpentane, is the first newman projection staggered or eclipsed?
Wednesday, February 25, 2015 at 3:55pm

chemistry
How is the reaction quotient used to determine whether a system is at equilibrium? The reaction is at equilibrium when Q > Keq. At equilibrium, the reaction quotient is undefined. The reaction quotient must be satisfied for equilibrium to be achieved. The reaction is at ...
Wednesday, February 25, 2015 at 2:51pm

chemistry
Upon combustion, 4.30 grams sample of a compound containing only carbon, hydrogen, and oxygen produced 8.59 g of CO2 and 3.52g of H2o. what is empirical formula of the compound ?
Wednesday, February 25, 2015 at 2:32pm

Chemistry
HCl is a gas at room temperature and does not conduct electricity. Yet when dissolved in water, the solution becomes an excellent conductor. Classify HCl as metallic, ionic, molecular or covalent network, and explain why HCl would conduct electricity in an aqueous solution.
Wednesday, February 25, 2015 at 2:26pm

chemistry
I ned these classified as metallic, ionic, molecular or covalent network and two reasons why. Aluminum Ascorbic acid Graphite Paraffin Palmitic acid Sodium chloride Sucrose Water
Wednesday, February 25, 2015 at 2:26pm

chemistry
Are acids like ascorbic acid and palmitic acid ionic, molecular, or covalent network compounds
Wednesday, February 25, 2015 at 2:24pm

chemistry
Which of the following statements is not true? 1.Chemical equilibria are examples of reversible processes. 2.When multiple reaction steps are in equilibrium, then the equilibrium constant for the net reaction is the product of the individual reactions. 3.The equilibrium ...
Wednesday, February 25, 2015 at 2:21pm

Chemistry
Lets say you melted palmitic acid, paraffin, and sucrose. While they be good conductors, poor conductors, or will they not be able to conduct electricity.
Wednesday, February 25, 2015 at 2:10pm

Physical sciences(Chemistry)
Explain why the ethanoic acid have a higher boiling point than ethanol and other molecules?
Wednesday, February 25, 2015 at 1:32pm

Physical sciences(Chemistry)
Explain why ethanol has a higher boiling point than bromoethane and the hydrocarbons?
Wednesday, February 25, 2015 at 1:23pm

Chemistry
A weighed amount of sodium chloride is completely dissolved in a measured volume of 4.00 M ammonia solution at ice temperature, and carbon dioxide is bubbled in. Assume that sodium bicarbonate is formed until the limiting reagent is entirely used up. The solubility of sodium ...
Wednesday, February 25, 2015 at 1:14pm

Chemistry
A dive tank is designed and built to be safe if the difference between the pressure inside the tank and the pressure outside the tank does not exceed 12 atm. A diver has the tank filled at the dive store at a temperature of 20o C to a pressure of 10 atm. The diver places the ...
Wednesday, February 25, 2015 at 1:14pm

Chemistry
pyrite, FeS2 reactswhen it is heated strongly in the air according to the equation 4 FeS2(s) + 11 O2 rightarrow 2 Fe2O3(s) + 8 SO2(g) What volume of sulfir dioxide ( measured at room temprature and pressure) would be produced by heating 100g of pyrite in excess of air Molar ...
Wednesday, February 25, 2015 at 11:49am

11th chemistry
Give reason- Ice floats on water near the melting point. Copper is ductile and malleable but brass is not. Latent heat of fusion of solid co2 is much less than that of silicone dioxide. pls ans asap...have my exams tom.
Wednesday, February 25, 2015 at 6:17am

Chemistry
Why is it that Hydrogen fluoride has a boiling point of 19 degree celsius, whereas water has a boiling point of 100 degree celsius.
Wednesday, February 25, 2015 at 2:18am

chemistry
2KClO3-2KCl+3O2 If this reaction produced 35.2 g of KCl, how much O2 was produced (in grams)?
Wednesday, February 25, 2015 at 12:25am

Chemistry
Consider the following reaction: CO(g)+H2O(g)⇌CO2(g)+H2(g) Kp=0.0611 at 2000 K A reaction mixture initially contains a CO partial pressure of 1348torr and a H2O partial pressure of 1780torr at 2000 K. Calculate the equilibrium partial pressure of CO2. Calculate the ...
Wednesday, February 25, 2015 at 12:23am

AP Chemistry
iN A LAB, the orders of two reactants, A and B, were determined experimnetally to be 2 and 3 respectively. a. write the rate law for this reaction. c. what would happen to the rate of the reaction if A were Doubled? d. what would happen to the rate of the reaction if B were ...
Tuesday, February 24, 2015 at 11:26pm

Chemistry
Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were reacted completely and 7.91×106g of Ti(s) was obtained in the experiment. a. Calculate the theoretical yield of Ti(s). b.What is the actual yield of Ti(...
Tuesday, February 24, 2015 at 11:24pm

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