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You are watching: Suppose you have 2.00×1018 reams of lead (pb). how many lead atoms do you have?


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Questionsuppose you have actually 100mL of each of the adhering to solutions. In which will the many CaCO3 dissolve? a) 0.10M NaCl b) 0.10M Na2CO3 c) 0.10M NaOH d) 0.10M HCl .


QuestionSuppose you have actually a calorimeter that includes 100.0 grams the water in ~ an initial pressure of 25 degrees Celsius. A salt (2.19 g, 0.020 moles) is dissolved in the water, and also the last temp is 29 degrees Celsius. Calculation the standard warm of solution and determine even if it is dissolution to be exothermic.


QuestionSuppose you have actually 1.0L that a saturated Zn(OH)2 solution. How many moles of Zn(OH)2 will precipitate when enough solid NaOH is added to provide a last concentration of 0.010M ? (Assume no volume change). The pH the a saturated equipment of Zn(OH)2 in water is pH=8.65..


QuestionSuppose you had solutions 1 M in Hg(NO3)2 and Na2S available. Ksp HgS=1.6x10-34. What is the highest possible E you could accomplish with a Hg-Hg2+ concentration cell? What would be the constituents of each fifty percent cell? ignore the truth that S2- hydrolyzes generally in water.


QuestionSuppose you have 4.85 g the powdered magnesium metal, 0.950 together of 2.00 M potassium nitrate solution, and also 0.950 together of 2.00 M silver nitrate solution.Part C: What volume of systems is necessary to completely react v the magnesium?Part D: What is the molarity of the Mg2+ ions in the resulting.


QuestionSuppose you had actually a mixture of 2.0 moles of methanol and also 1.0 mol that ethanol at a constant temperature. The vapor press of pure methanol in ~ this temperature is 81 kPa and the vapor pressure of pure ethanol is 45 kPa. What is the partial press attributed come ethanol in.


QuestionSuppose you had a huge bottle of concentrated hydrochloric acid, 12.0M. Just how much the the concentrated hydrochloric acid would certainly you have to use if you to be to do 500mL of a 3.0M equipment of hydrochloric acid? 20.0 mL .


QuestionSuppose you have actually a bucket that sand containing 6.5 billion seed of sand (6.5 x 10^9 grains). Most of the seed of sand space white, yet there space some brown grains combined evenly throughout.If the concentration the brown sand is 2.0%, how many grains that brown sand space in the.


QuestionSuppose you have 25.00 mL of phosphoric acid, and you perform not understand what it's concentration is. If you titrated it through a 0.733 M potassium hydroxide solution, and also it take it 39.50 mL the the base to neutralize the acid. What to be the concentration the the phosphoric acid? write the.


QuestionSuppose you have a 250 mL glass bulb containing an unknown amount of PCl3 gas. If the bulb consists of 1.5 atm the PCl3 in ~ 25C, determine just how much gas in grams is in the bulb..


QuestionSuppose you have a 6M HCl solution and also want to make 15 mL the 1.25 M HCl solution. How much 6M HCl is needed and also how lot distilled water is used?.


QuestionSuppose you had actually an analyte i m sorry is prone to hydrolysis, oxidation and reacts with many of the essential solvents. Describe which sample preparation method you would pick to isolate this analyte type a organic product procession (tree bark)..


QuestionSuppose you have actually 1.00 together of an aqueous 1.00 M NaCl solution. Go the NaCl concentration the the staying solution decrease, stay the same, or boost with the adhering to changes?(Assume each adjust is done independently to the original solution.)-Letting half of the water evaporate from the solution -Adding second 1.00.


QuestionSuppose friend had added a magnesium piece to every one of the check tubes, i m sorry of the unknowns would have reacted? Write well balanced chemical equations for every one of them. Remember that your equations need to be balanced!Unknowns - barium chloride : BaCl2, sodium sulfate: Na2SO4, potassium iodide : KI, lead (II) nitrate.


QuestionSuppose you have actually a cylindrical glass tube v a thin capillary opening and you wish to recognize the diameter that the opening. You deserve to do this through weighing the glass pipe before and also after that is filled v liquid mercury. Using the following information, calculation the diameter the the capillary.


QuestionSuppose you have actually 12ml that nitric acid, and you dont know what it's concentration is. If girlfriend titrated it through .233 M salt hydroxide solution, and it take it 8.33 ml the the basic to neutralize the acid, what was the concentration the the nitric acid? compose the Neutralization reaction, balance.


Questionsuppose you have actually 125.0 ml of 0.400 M NaCl solution. This is also salty, so you dilute that by including another 50.0 ml the water. What is the new concentration the NaCl in units of molarity.


QuestionSuppose you have a 250 mL buffer solution containing 0.400 M nitrous acid and also 0.400 M salt nitrite. You then add 50.0 mL that a 0.100 M NaOH solution. What is the final pH of the mechanism assuming the the buffer concentration were at equilibrium prior to the base to be added..


QuestionSuppose girlfriend dissolve 0.1 moles of formic acid in 1 water. A. What are every one of the molecules and ions girlfriend would intend to find? b. Which among the over will be discovered in the greatest complete amount? c. Hich the the over will be discovered in really small.


QuestionSuppose you have actually 1.00 together of an aqueous buffer comprise 60.0 mmol acetic mountain (pKa = 4.76) and 40.0 mmol acetate. Calculation the pH the this buffer. What volume of 2.00 M NaOH would be compelled to rise the pH come 4.93?.


QuestionSuppose you create the adhering to spectroscopic data because that two various concentrations that a solution. What is the slope of the line formed by this points? What is the y-intercept? What is the concentration the a systems with an absorbance of 0.371 ? M.


QuestionSuppose you have actually a 6M HCl systems on hand and want come prepare 15mL the a 1.25M HCl solution. Exactly how much 6M is needed? exactly how much distilled water is used? display your work.


QuestionSuppose you have actually a 50.00ml that 0.0100 M chloroacetic acid solution, HC_2H_2O_2CI. K_a=1.40 times 10^-3. What is the early pH for this solution? What is the equivalence point pH if the chloroacetic mountain was titrated v 0.0100M NaOH?.


QuestionSuppose you have actually 1.00 l of an aqueous buffer comprise 60.0 mmol benzoic mountain (pKa = 4.20) and 40.0 mmol benzoate.pH the buffer= 4.023What volume the 4.50 M NaOH would certainly be required to rise the pH come 4.93? .


QuestionSuppose you extract warm from saturated heavy steam at 300 C entering a warm exchanger in which the vapor condenses and leaves the warmth exchanger together saturated fluid water in ~ 90 C.(a) for a total enthalpy adjust of H = mh = 44.700kJ/s what is the compelled mass flow rate the the steam?(b) What is.


QuestionSuppose you have actually 1.00g that CO2 and also 1.00 the SO2 in a container whose total pressure is 723 mmHg. What is the partial pressure of each gas? Hint: girlfriend will need to discover the moles of every gas and also determine the fractional ingredient of CO2 and also SO2 in this mixture..


Question3. Saccharin is a weak essential base through a Kb of 4.80 x 10 A 0.297-g sample the saccharin dissolved in 25.0 mL of water has actually a pH that 12.190. What is the molar mass of saccharin?.


Question3. Rate and also Temperature room non-linear relation yet Arrhenius uncovered an equation which shows straight relation between log k (k= price constant) and also 1/T (T = reaction temperature in kelvin). Write the Arrhenius equation. What is Ea in this equation?.


QuestionSuppose you had actually an unknown solution that contained either liquified NaOH, NaCl, or NaNO. You included 4 fall of AgNO equipment to 4 fall of the unknown solution and observed the no solid formed. What deserve to be concluded around the unknown solution.a. It contains NaOH.b. It has NaCl.c. That contains.


QuestionSuppose you have actually a 10.00mL systems of H2A, a diprotic weak acid, which has actually a pka1 of 4.00 and also a pka2 of 9.00. The official concentration is 0.100M and also it is titrated by 0.100M NaOH.(a) write the two significant reactions during the titration. Find the 2 equivalence points.(b) because that each of the.


QuestionSuppose you have actually 4.75g of powdered magnesium metal, 1.10L of 2.00M potassium nitrate solution, and also 1.10L of 2.00M silver nitrate solution.(a) Which among the options will react through the magnesium powder?(b) What is the net ionic equation that describes this reaction? Express her answer as a chemical equation. Identify every one of the phases in your.


QuestionSuppose you have 4.75g of powdered magnesium metal, 1.10L the 2.00M potassium nitrateChemistry

QuestionSuppose you have actually a bottle of aqueous solution labeled "53.4(+or- 0.4)% (wt/wt)NaOH whose density is 1.52(+or- 0.01) g/ml".A) How plenty of ml that 53.4% NaOH are necessary to prepare 2.000 together of 0.169 M NaOH?B) If the apprehension in transporting the NaOH is (+or- 0.10 ml), calculation the absolute hesitation in.


Question3. Choose the ideal reagent to transform 3-heptyne to trans-3-heptene?A) Na/NH3B) H2/PtC) H2/Lindlar's catalyst.


QuestionSuppose you have actually 12.00 mL of nitric acid, and you perform not recognize what it's concentration is. If friend titrated it through a 0.233 M salt hydroxide solution, and it took 8.33 mL the the basic to neutralize the acid. What was the concentration that the nitric acid? compose the.


QuestionSuppose you have a 1.00 L systems with 0.429 moles of HF (Ka = 7.2*10-4). Friend have added 0.429 mole of NaOH come the solution. Recognize the pH of solution after the NaOH has actually been added..


QuestionSuppose you have 0.100 m3 that CO2, at pressure of 2.00 atm, and also a temperature the 30.0 C. How numerous grams of CO2 execute you have? Express your answer in grams. Enter only a number value, execute not enter units..


QuestionSuppose you have 100 mg of a sample dissolved in 0.6 mL the water. The partition coefficient because that this link in water and also ether is 4.01. Calculate just how much full compound friend would acquire with 3x0.2 mL extractions with ether.2. Calculate just how much girlfriend would obtain wiht 1 x 0.6.


QuestionSuppose you decision you don't trust your lab mate's stock solution and want to comprise the 250 mM HEPES systems fresh. Describe this process. HEPES has actually a molar fixed of 238.30 g/mol..


QuestionSuppose you have 100.0 mL that a 1.000m HCl (aq) solution and also 100.0 mL of a 1.000m NaOH (aq) solution, which are mixed at 25 degreesC. Presume volumes room additive, what will certainly be the boiling allude of the result solution? (Kb because that water is 0.512 degreesC/m).


QuestionSuppose you decision to define your own temperature scale using the freezing suggest (13 C ) and boiling point (360 C) of oleic acid, the key component that olive oil. If you collection the freezing suggest of oleic acid as 0 C and also the boiling suggest as 110 C, what.


QuestionSuppose you had actually standard .1000 M NaOH ,an indicator, such as phenolphthalein, an analysis balance, and also a micro-buret available. Describe how you could determine the (apparent) purity that the para-nitrobenzoic mountain you synthesized..


QuestionSuppose you had 1.00 mole that pennies (each penny has actually a thickness the 0.059 inches} and you stacked them among top that each various other to do a an extremely tall pile. You collection off native the bottom that the pile in a room craft that deserve to travel at the speed.


QuestionSuppose you discovered that the elution volume that the hemoglobin (molecular mass 64,000 daltons) to be 7.5mL on her column and that the elution volume of a myoglobin molecule (molecular mass 17,000 daltons) waas 11.4mL. Calculate the approximate molecular mass of an unknown protein which had an elution volume of 9.0mL.


QuestionSuppose you have 50.0 cm^3 that a problem with density of 46.0 g/L transform the volume indigenous cubic centimeters to millimeters to liters, then identify the fixed of the sample in grams. Additionally show the unit analysis by dragging components into the unit-factor slot below. The inquiry marks (?) represent.


QuestionSuppose you had actually to store your solution between laboatory periods, however forget to stopper your melting pipe (once you have actually weighed everything but have not yet measured the second freezing point). Would your calculation molar mass be better than, less,than, or the very same as the correct molar mass? Prove this.


QuestionSuppose you have actually 50.0 cm3 of a problem with density of 44.0 g/L. Convert the volume from cubic centimeters to milliliters come liters, then identify the mass of the sample in grams. Also show the unit analysis by dragging contents into the unit-factor slots below. The question marks (?) represent.

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QuestionSuppose you have a cube through mass that 16.0 g, v a leaf of size 2.0 cm. What is the density of the cube in g/ml. Go into only a numerical value, do not go into units..