04/12/20

100.00 mL of 0.100 M Pb(NO3)2 and 100.00 mL of 0.200 M HCl are placed in a calorimeter.
Pb2+ (aq) + 2 Cl- (aq) ---> PbCl2(s).Both solutions were intially at 27.50 C. After the reaction, the final temperature was 24.80 C. Calculate the heat of this reaction in KJ/mol of PbCl2... more
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04/12/20

i need an example of how to do heat transfer and enthalpy of neutralization
volume of 2.11 M HCl- 99.8initial temp of Hcl- 24 degrees Celsiusvolume of 2.05 M NaOH- 99.2initial temp of NaOH- 24 degrees Celsiusmoles of H+ is 0.211 i think?moles of OH- is 0.203 i think? i... more
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04/12/20

how do I calculate calorimeter constant

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04/11/20

At which electrode are electrons generated?

Consider the Figure shown in which X represent Zn(s), T represents Co(s), and S is a solution that is 1.0 M in Co 2+.At which electrode are electrons generated? The reduction potentials of Co2+ and... more
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04/11/20

Determine Eo for the following reaction, using the given standard reduction potentials
Determine Eo for the following reaction, using the given standard reduction potentials:Cr(s) + Mn2+(aq) → Cr3+(aq) + Mn(s)Eo for Mn2+(aq) = -1.18 VEo for Cr3+(aq) = -0.74 VMy answer was 0.44 but... more
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04/11/20

Determine Eo for the following reaction, using the given standard reduction potentials
Determine Eo for the following reaction, using the given standard reduction potentials:Fe3+(aq) + Ti(s) → Fe2+(aq) + Ti2+(aq)Eo for Ti2+(aq) = -1.63 VEo for Fe3+(aq) = 0.77 VMy answer is -2.4 but... more
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04/11/20

When solutions of NH4Cl and KNO3 are mixed?
1)a precipitate of KCI forms2)a precipitate of NH4NO3 forms3) no precipitate of forms4) precipitates of NH4NO3 and KCI form5) a precipitate of NH4CL2 forms
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04/11/20

Chemistry question
What are chylomicrons? enzymes that remove amino acids from the N-terminal end of peptides and proteins possessing a free amino group hormones secreted in the small intestine that stimulate the... more
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04/11/20

Chemistry question
Some fats and oils undergo oxidation and hydrolysis reactions when they come into contact with moist air at room temperature and acquire a characteristic disagreeable odor. This property of fats... more
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04/11/20

Chemistry question
The following are carbohydrates except _________. erythrose triglycerides xylulose ribose mannose
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04/11/20

Chemistry question
Why are radioactive isotopes used for various applications? Select all correct responses. We can detect the radioactivity. We can use the energy given off. They are all artificially produced. They... more
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04/11/20

Chemistry question
Glycerol is used for the synthesis of all except _______. glycolipids phospholipids diacylglycerols glucose triacylglycerols
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04/11/20

Thermal decomposition of potassium chlorate produces oxygen and potassium chloride. Calculate the % yield if 35 g of oxygen are collected after heating 100g of KClO3. 2 KClO3 2KCl + 3O2
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04/10/20

Finding actual Yield, Theoretical yield and percent yield
A student was synthesizing Aspirin (C9H8O4) in the laboratory produced by the reaction of salicylic acid (C7H6O3) and acetic anhydride (C4H6O3). Using 4.0 g of salicylic acid as the limiting... more
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04/10/20

how to find calorimeter constant
volume of cold water- 97.5 mLtemp of cold water- 7 degrees Celsiustemp of hot water- 77 degrees Celsiusvolume of hot water- 98.5 mLfinal temp after mixing- 41 degrees Celsius mass of cold water-... more
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04/10/20

How many grams of sucrose are needed to make 645 mL of a 32.0% (w/v) sucrose solution
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04/10/20

Dilution problem question
Question: There are only 37.5 mL left of the 6.0M NaOH stock solution. A lab calls for 0.75M NaOH solution. What volume of the solution can be made?I've tried converting the mL into liters and then... more
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04/10/20

Chemistry question

Name this derivative of benzene.
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04/10/20

Chemistry question
Organic chemistry historically arose from the study of compounds from what source? the elements living things medicine geological samples the dye industry
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04/10/20

Chemistry question
Why is half-life such a useful concept for understanding radioactive processes? Having a half-life implies radioactive decay by alpha emission. A half-life is a characteristic value for a given... more
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04/10/20

Chemistry question

Choose the incorrect statement about fatty acids from the following. Fatty acids usually contain an even number of carbon atoms. Membrane lipids contain mostly unsaturated fatty acids. The melting... more
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04/10/20

Chemistry intro help
Pb(SO4)2+2Zn⟶2ZnSO4+PbIf 0.431 mol of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate will be produced in the reaction?
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04/10/20

CHemistry into help
For the chemical reaction2Al+3H2SO4⟶3H2+Al2(SO4)3how many moles of hydrogen (H2) are produced from 8.0 mol of aluminum (Al)?
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04/10/20

Chemistry 60 help
If 0.0424 mol CaCl2 is dissolved in water to make a 0.390 M solution, what is the volume of the solution?
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04/10/20

Chemistry 60 help
A student needs to dilute a 0.49 M Pb(NO3)2 solution to make 87.0 mL of 0.21 M Pb(NO3)2. Set up the calculation by placing the values with the correct units into the equation. Then, calculate the... more
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