steps. The uvelan U number of enzyme-catalyzed is C6H1206 (s) → 2C2H3OH(I) + 2CO2(g) Calculate the standard enthalpy change for this reac- tion, assuming that the carbohydrate is a-D-glucose. Bond Enthalpy 3.58 (a) Explain why the bond enthalpy of a molecule is always defined in terms of a gas-phase reaction. (b) The bond dissociation enthalpy of F2 is 150.6 kJ mol-1. Calculate the value of ArHo for F(g) 3.59 From the molar enthalpy of vaporization of water at 373 K and the bond dissociation enthalpies of H2 and O2 (see Table 3.4), calculate the average O-H bond enthalpy in water, given that H2(0) +02(9) H2Ou) 285.8 kJ mol-1 3.60 Use the bond enthalpy values in Table 3.4 to cal- culate the enthalpy of combustion for ethane, 2C2H6(g) + 702 (g) → 4CO2(g) + 6H20(1) Compare your result with that calculated from the nthalpy of formation values of the products and reac- ants listed in Appendix 2.

The American Dental Association recommends that an adult female should consume 3.0 mg of fluoride (F-) per day to prevent tooth decay. If the fluoride is consumed as sodium fluoride (45.24% F), what amount of sodium fluoride contains the recommended amount of fluoride? Express your answer using two significant figures.

7. Aliter of boiling water will dissolve 97.5 grams of a certain compound. At room temperature, only 2.3 grams of the compound will dissolve in a liter of water. When a student dissolves 65.8 grams of the compound in a liter of boiling water and lets it cool to room temperature, what will be the mass (grams) of the crystals that form? Show your calculation.

6. 7 8. 9. 10 11 12 13 14 A chemist prepares a solution of potassium iodide (KI) by measuring out 3.0 × 10“ umol of potassium iodide into a 350. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in umol/L of the chemist's potassium iodide solution. Round your answer to 2 significant digits. alo Ar μ mol x10 Submit Assignment Continue 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center | Accessibility Show All IMG-4472.jpg IMG-4471.jpg IMG-4467.jpg IMG-4464.jpg IMG-4474.jpg MacBook Air DII F12 80 F9 F10 F11 F7 F8 F5 F6 F3 F4 F2 %23 $ 4 5 6 7 8 9 3 P 4.