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A tire’s pressure is 30 psi when 0.40 mol of

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Get college assignment help at Smashing Essays Question A tire’s pressure is 30 psi when 0.40 mol of air fill it at 100 K. If the temperature rises to 300 K and 0.20 mol of air are let out of the tire, what is the new pressure?Show your equations, label your answers, and explain your calculation.

explain the electron configurations ATTACHMENT PREVIEW Download attachment IMG-1461.JPG

Question explain the electron configurations ATTACHMENT PREVIEW Download attachment IMG-1461.JPG

Need help with assignment #2 Please.Lab Link – http://chemcollective.org/vlab/85 Objective:

Question Need help with assignment #2 Please.Lab Link – http://chemcollective.org/vlab/85 Objective: To gain an understanding of LeChatlier’s principle through the observation of the effect of induced perturbations on the equilibrium distribution of various cobalt(II) complexes. Background: Cobalt(II) does not exist in aqueous solution as a free ion, but forms a complex ion where 6 water molecules, acting as a Lewis bases (electron pair donors), donate electrons into the vacant orbitals of the cobalt (II). This results in the pink complex ion Co(H2O)6 2. In the presence of chloride ions, a different complex forms, the blue CoCl4-2 complex ion. We use their different colors to indicate the equilibrium concentrations for the following reaction. For instance, when Co(H2O)62  is predominant, the solution is pink, and the equilibrium lies on the left side or reactants side. Blue solution means CoCl42- is the major species.Co(H2O)62 (aq) 4Cl – (aq) CoCl42- (aq) 6H2O (l)                 Equation 1.                pink                                blueAssignment 1: Write a K expression for this reaction (note that that liquid water shouldn’t be included in the K expression). K=Activity 1, workbench setup:From the stockroom/solution tab, add all three solutions under the Cobalt (II) Chloride Exp solutions sub menu to the workbench. From the stockroom/glassware tab, add three 250mL Erlenmeyer flasks to the same workbench. Pour 25mL of 1M CoCl2 solution from the stock solution flask to each of the three Erlenmeyer flasks, and save the original flask, which also has 25 mL 1M CoCl2 solution, as control. In this simulation you not only observe the equilibrium concentrations through their colors, but also directly read their concentrations. Clicking on any of these four flasks should reveal a table of species concentrations in molarity on the left-hand side menu. The solution’s temperature is also shown on the left-hand side as in deg C. Note how the stock solutions exist as their ions (CoCl2(aq) exist as Co(H2O)62  and Cl-. Now you are ready for this experiment.Assignment 2:Use the K expression in assignment 1 and equilibrium concentrations on the left to determine the K value at 25 deg C. Activity 2, Adding Cl-:Predict the effect of adding chloride ions. According to LeChatlier’s Principle, which side would the equilibrium shift when adding chloride? What would be the color after the shift?To one of the 1M CoCl2 Erlenmeyer flask, which has [Co(H2O)6]2  and Cl-, add 12 M HCl form the HCL solution flask directly in 1mL increments until the equilibrium color has changed. ( Hint: Type in 1 for the volume to be transferred, and then keep clicking “pour” until you see a change, counting clicks or subtract 25mL from the total volume to determine the volume of HCl added.)Does your observation match or against your prediction in this activity?Activity 3, Removing Cl-:Predict the effect of removing chloride ions. According to LeChatlier’s Principle, which side would the equilibrium shift when removing chloride? What would be the color after the shift?Removal of free chloride ions in the above equilibrium can be achieved by adding some silver nitrate, AgNO3, as the reactions below. AgNO3(aq) Ag  (aq) NO3- (aq)Ag (aq) Cl – (aq) AgCl(s) AgNO3(aq) Cl – (aq) AgCl(s) NO3-(aq)                                                                                              Equation 2.Note by the above equation, Ag  scavenges free chloride ions on the reactant side of equation 1 by tying them up in a precipitate, and thus removes them from the solution. You can observe the effect of removing chloride through color change and concentration change.Use the same Erlenmeyer flask from activity 1 without changing anything in this activity. Now remove some of the free chloride ions by adding some silver nitrate to this flask. (Hint: add 1 mL amounts of the silver nitrate successively until the equilibrium has been shifted instead of a whole bunch at once. Count the clicks or subtract 25mL from the total volume to determine the volume added.).Does your observation match or against your prediction in this activity?Activity 4, equilibrium under different temperature:Right click on the second Erlenmeyer flask and choose “thermal properties”. You can now change the temperature between 0 and 99 deg C. You should select temperatures much higher and lower than 25 deg C, the control flask’s temperature. Multiple tests may be required to see a clear color change. Therefore, “heat” or “cool” the system until you have perturbed the equilibrium. Use the color change during if the heating shifts the equilibrium to which side. Or the cooling process shifts the equilibrium to which side. Then apply LeChatlier’s principal to determine if it is exothermic or endothermic.Is the reaction as written endo or exothermic?Activity 5, determine an equilibrium constant K’ at a different temperature:Either use the control flask or the third flask for this activity. Right click and choose the thermal properties, click on the thermally isolated system option, and change the temperature to a number of your choice, for example, 35 deg C. The concentrations of different species in the solution may change even though the color may stay the same. The concentrations can be read out from the table on the left.Assignment 3:After finishing the last activity, left click on the flask that was used in Activity 5 and take a screenshot or a clear snapshot with your smartphone. You will be asked to upload this screenshot to earn points on Canvas.Determine the equilibrium constant K’ at this temperature with the concentrations.Compare this K’ with the K in Assignment 2, are the value difference agree or against with your endo or exothermic determination?

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Question 1.     Does your prepared soap contain excess sodium hydroxide? How can you tell? 2.     Does your household soap sample contain excess sodium hydroxide? How can you tell?

For the reaction 4FeCl2(aq) 3O2(g) → 2Fe2O3(s) 4Cl2(g),

Question For the reaction 4FeCl2(aq) 3O2(g) → 2Fe2O3(s) 4Cl2(g), what volume of a 0.945 M solution of FeCl2 is required to react completely with 4.32 ×1021molecules of O2?5.69 mL5.08 mL answer10.1 mL9.04 mL4.23 × 103 mL Flag this QuestionQuestion 92 ptsAn analytical procedure requires a solution of chloride ions. How many grams of CaCl2 must be dissolved to make 1.95 L of 0.0439 M Cl-?4.75 g0.400 g answer19.0 g 9.74 g2.44 g Flag this QuestionQuestion 102 ptsHow many grams of NaCl are contained in 350. mL of a 0.115 M solution of sodium chloride?40.3 g2.35 gnone of these answer6.7 g4.70 g Flag this QuestionQuestion 112 ptsDiabetics often need injections of insulin to help maintain the proper blood glucose levels in their bodies. How many moles of insulin are needed to make up 45 mL of 0.0062 M insulin solution?0.00056 mol answer0.14 mol0.28 mol0.00028 mol7.3 mol

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Question How many molecules of sucrose are in 0.5 L of a 1 molar solution of sucrose? I don’t understand how to work this problem out.

Hydrolysis of the disaccharide sucrose gives the following monosaccharides: 1)

Question Hydrolysis of the disaccharide sucrose gives the following monosaccharides: 1)  fructose and ribose. 2)  fructose and glucose. 3)  ribose and glucose. 4)  ribose and galactose. 5)  fructose and lactoseIodine can be used to detect the presence of __________ in solution. 1)  maltose. 2)  fructose. 3)  starch. 4)  galactose. 5)  xylose.

I need help with my physical chemistry lab report, attached

Question I need help with my physical chemistry lab report, attached is the question alt=”BFFB126C-627D-4223-A5D0-0DA7D8E2608B.png” /> Attachment 1 Attachment 2 ATTACHMENT PREVIEW Download attachment BFFB126C-627D-4223-A5D0-0DA7D8E2608B.png opagat Experiment 4 – Kinetics?preview=10280704 Page

What does the proper half-reaction involving N look like?NO3-

Question What does the proper half-reaction involving N look like?NO3- Ag → NO2- Ag a. 2 H NO3- → NO2- 2e- H2Ob. 2 H 2e-  NO3- → NO2- H2Oc. 2 H NO3- → NO2- H2O. d. 2 H NO3- → NO2- 3e- H2Oe. 2 H 3e- NO3- → NO2- H2OShow all of your work!

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Question Which of the following reactions will be spontaneous? a. Ag metal in aqueous Zn(NO3)2 b. ZN metal in aqueous AgNO3 c. Both are spontaneous d. Neither are spontaneous

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Get college assignment help at Smashing Essays Question How many grams of 2% ammoniated mercury ointment can be made from 1250 grams of 5% ammoniated mercury ointment ?please explain the answer

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Question Which of the following will cause H2O to boil below 100 °C? a. Lowering outside air pressure b. Increasing outside air pressure c. Keep outside air pressure at STP but heat the liquid more thoroughly. d. Keep outside air pressure at STP but heat the liquid less thoroughly.Provide a rationale for your answer.

Energy Calculation: Part a: style=”background-color:transparent;color:rgb(33,33,33);”>Calculate the energy absorbed when 10.

Question Energy Calculation: Part a: style=”background-color:transparent;color:rgb(33,33,33);”>Calculate the energy absorbed when 10. g of sodium melts.Part b: Calculate the energy required to raise the temperature of 10. g of bromine from 50°C to 75 °C.Provide equations and rationales for your answers,

Which of the following ions has the largest radius?Br-S2- />B3 Mg2

Question Which of the following ions has the largest radius?Br-S2- />B3 Mg2 Li

Specific Heat

Question Specific Heat

Examine the geometry of the molecule in the window. Use

Question Examine the geometry of the molecule in the window. Use the geometry to determine the bond types. />The molecule does not have a hydroxyl group. _______ (true or false)The molecule has a hydroxyl group that is bonded to a tetrahedral carbon atom. _______ (true or false)The molecule has a hydroxyl group that is bonded to a trigonal planar carbon atom. _______ (true or false)The molecule is an alcohol. _______ (true or false) ATTACHMENT PREVIEW Download attachment Capture92.JPG

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When the substance is heated from D to E in

Question When the substance is heated from D to E in Diagram 1, the energy is going towards ____. a. Raising the temperature of the substance b. Breaking the intermolecular forces between molecules c. Raising the temperature of the surroundings. d. All of these Give a rationale for your answer.

When the membrane transports proteins and move glucose from a

Question When the membrane transports proteins and move glucose from a high to low concentration across the plasma membrane?

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Question What is the primary function of a carbohydrate molecule in the plasma membrane?

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