Chemistry question and answers for September 23, 2023
- Q 1.Draw the mechanism for converting a fat into a fatty acid.2. Why does soap become ineffective in hard water?3. There are many different types of fats. What are twofeatures that...
- Q Calculate the pH for each case in the titration of 50.0 mL of0.110 M HClO(aq) with 0.110 M KOH(aq). Use the ionization constantfor HClO.What is the pH before addition of...
- Q What mass of oxygen will react with 16.6 g of aluminum accordingto the following reaction?4 Al + 3 O2 ? 2 Al2O3
- Q A. A 75.0-mLmL volume of 0.200 MM NH3NH3(Kb=1.8×10−5Kb=1.8×10−5) is titrated with 0.500 MM HNO3HNO3.Calculate the pHpH after the addition of 11.0 mLmL of HNO3HNO3.B. A 50.0-mLmL volume of 0.15 MM...
- Q Post Lab Questions:1. Describe the underlying principle of VSEPR theory.2. Explain why two compounds with the same generic formula,NH3 and BH3, have different geometries anddifferent shapes.3. Why are the structures...
- Q How many rotational degrees of freedom are there in a carbondioxide (CO2) molecule? Under low pressure, CO2 gas heated up tohigh enough temperature to excite its translational, rotational andvibrational modes,...
- Q Suppose 39.4g of zinc chloride is dissolved in 250.mL of a 0.60M aqueous solution of potassium carbonate. Calculate the finalmolarity of zinc cation in the solution. You can assume the...
- Q a)Provide two examples of corrosion that aredestructive.For each, provide the chemical equation that describes thecorrosion, and an example of an object that could be impacted byit. For example rust on...
- Q Calculate the pZn of a solution prepared by mixing 25.0 mL of0.0100 M EDTA with 50.0 mL of 0.00500 M Zn2+. Assumethat both the Zn2+ and EDTA solutions are buffered...
- Q An analysis of the inorganic constituents of a raw water yieldedthe following results:Ca^+2= 63 mg/LMg^+2= 15 mg/LNa^+=20 mg/LK^+= 10 mg/LCO3^-2= 16 mg/LHCO3^-1= 189 mg/LSO4^-2= 80 mg/LCl^- =14 mg/La) Compute the...
- Q 1. Vanadium crystallizes in a body-centered cubic lattice, andthe length of the edge of a unit cell is 305 pm. what is thedensity of V?2. Vanadium crystallizes in a face-centered...
- Q Use tabulated electrode potentials to calculate ΔG∘ forthe reaction2K(s)+2H2O(l)→H2(g)+2OH−(aq)+2K+(aq)
- Q You are designing a system to add CO2 to water to makecarbonated water (sparkling water, like Club Soda or Perrier). Ifthe gas pumped into the bottle above the water is...
- Q Explain (giving at least one example) how stable isotopes ofoxygen (i.e. 16O and 18O) can be used to measure thepaleotemperature of the ocean, specifically based on calciumcarbonate in “shells?â€
- Q Enough of a monoprotic weak acid is dissolved in water toproduce a 0.0122 M solution. The pH of the resulting solution is2.64 . Calculate the Ka for the acid.
- Q In a 1.0× 10–4 M solution of HClO(aq), identify the relativemolar amounts of these species from least to most. HNO3,OH^-,H3O^+,NO3^-,H2O
- Q Use the balanced equation for the combustion of ethaneto complete the table.2C2H6(g)  +7O2(g) →4CO2(g)  +6H2O(g)Initiallymixed0.231g1.056g0.00 g0.00 gHow muchreacts  g    g  ――Compositionof finalmixture  g    g    g    g Â
- Q 1) The percent ionization of a certain weak acid is 3.14%. Ifthe starting concentration of the acid is 0.55 M, what is the Ka ofthe acid?2) What is the pH...
- Q 3. Liquid Coffee Mate has many ingredients includingcorn syrup solids, vegetable oil, and sodium caseinate (a milkderivative). Classify each of these substances into the followingcategories of macromolecules: carbohydrates, lipids, or...
- Q Determine the pH during the titration of 24.8mL of 0.475 M nitrous acid(Ka = 4.5×10-4) by0.361 M NaOH at the followingpoints.(a) Before the addition of any NaOH__________(b) After the addition...
- Q Give representative chemical formulas for the three principaltypes of fossil fuels.Write a balanced chemical reaction converting each fuel to CO2and water.Using the equation calculate the grams of CO2 emitted per...
- Q Carbon-14 decays as follows:140           14                             C  ----> e  + N   6-1             7  isotopic masses are 14.00307 for nitrogen-14 and14.00324 for carbon-14. What energy change (kJ/moles) occurs in thebeta decay of C-14? NOTE: Do I...
- Q Calculate the enthalpy of the reaction2NO(g)+O2(g)?2NO2(g)given the following reactions and enthalpies of formation:12N2(g)+O2(g)?NO2(g),   ?H?A=33.2 kJ12N2(g)+12O2(g)?NO(g),  ?H?B=90.2 kJExpress your answer with the appropriate units.?H? =Part BCalculate the enthalpy of the reaction4B(s)+3O2(g)?2B2O3(s)given the following...
- Q Solid carbon can react with gaseous water to form carbonmonoxide gas and hydrogen gas. The equilibrium constant for thereaction at 700.0 K is 1.6×10−3 Kp .Part AIf a 1.55-LL reaction...
- Q i want a definition on lipids trans fats and hydrogenation whatthey do and there formulas
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