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  • Q1:8 calculate the ionization energy of the li 2 ion 9 show that the wavefunctions 100 and 200 for the hydrogen atom areSee Answer
  • Q2:8 calculate the ionization energy of the li 2 ion 9 show that the wavefunctions 100 and 200 for the hydroge 10 calculateSee Answer
  • Q3:Problems 1. The following electrode potentials were observed after a 1-year immersion period in natural seawater of pH 8.0 [20]:See Answer
  • Q4:5. In the interpretation of Pourbaix diagrams, corrosion is considered to occur when the concentration of dissolved metal ions attains a minimum concentration of 1.0 x 10-6 M. Suppose that a 0.50-cm² sample of aluminum immersed in 1.0 L of an aqueous solution corrodes at a constant current density of 100 μA/cm². How long will it take to produce a concentration of 1.0 x 10-6 MAI³+?See Answer
  • Q5:6.1 The problem has the potentials vs SCE whil pourbaix diagram has potential vs SHE, so you to convert via table 3.2.See Answer
  • Q6: a. Match the following terms to their definitions. (2 points) b. Match the following terms to their units. (1.5 points) c. What is the relationship between the atomic mass of an element and a mole of that element's atoms? (.5 point)See Answer
  • Q7: Problem 3Two chemicals, A and B when mixed produced an almost perfect ideal solution. The vapour pressures of A and B were 25.4 kPa and 96.1 kPa respectively at 298 K. (b) Indicate on your phase diagram the compositions (xA, YA, ZA) of the piston at the given pressure. What is the total number of moles of A and the total number of moles of B in the piston? What is the number of moles of gas and number of moles of liguid in the piston? What is the number of moles of gaseous chemical A and liquid chemical A in the piston? What is the number of moles of gaseous chemical B and liquid chemical B in the piston? What is the approximate volume (in liters) of the piston? (hint: ignore the volume of the liquid). (a) Draw a pressure composition phase diagram for 298 K (full marks if drawn correctly in Excel). A solution containing a total of 20 mmol = na + n(b)was prepared in a piston with the composition of Z(A) = 0.6481. The total pressure on the piston was adjusted to 40.66 kPa.See Answer
  • Q8: which element has the largest bond atomic radius? A. Tungsten, W B Osmium C Rhenium D Tantalum E hafnium HF The coordination sphere of complex consists of A. coordination of steric numbers B. ligands C.metal ion only D. the cental metal ion the ligands bonded to it 5.primary and secondary valenciesSee Answer
  • Q9: which of the following displays geometrical isomerism ) square-plunar ERH (U)a clz square planar [P+ Len)272 Octunedral. Octahedral rWINHa)CI]2tSee Answer
  • Q10: B.NumePOllowing metals 1, Ch torinepen ta aqua ehh liro Ch ruminiun nchiorpenta a qu a Ch rumi um (Ll!) 1on Chlonde 3. Penta aq -vh ch lor1) ch lurideSee Answer
  • Q11: 15. What are the reS rectire-cetial- metal. Ox idatun stute. wordinaten #, t all over ChargeOFfullowycumplex Naz EcrENHa), (Nes] C; +3,しitl Detl, le,- e. +2,4,-)See Answer
  • Q12: Problem A: Below is shown a plot of the natural logarithm of the diffusion coefficient versus reciprocal of the absolute temperature, for the diffusion of iron in chromium. Determine values for the activation energy(in J/mol) and pre exponential (in m?/s). See Answer
  • Q13: Need Overall cell reaction for sodium sulfate electrolysis. Anode and cathode are given. Here are the half reactions for anode and cathode: \text { Anode: } \operatorname{Cu}(\mathrm{s}) \longrightarrow \mathrm{Cu} \wedge 2+(\mathrm{aq})+2^{\wedge} \mathrm{e}-\text { and cathode: } 2 \mathrm{H} 2 \mathrm{O}(1)+2 \mathrm{e}^{\wedge} \rightarrow \mathrm{H} 2(\mathrm{~g})-2 \mathrm{OH}-(\mathrm{aq})See Answer
  • Q14: a. What two reactants are necessary in order for a hydrocarbon combustion reaction to take place? (.5 point) b. What three product stake place? (.5 point)are necessary in order for a hydrocarbon combustion reaction to C.Complete the following combustion reaction. Write your balanced equation two different ways. (1 point) \mathrm{C}_{8} \mathrm{H}_{18}+\mathrm{O}_{2} \rightarrow \mathrm{C}_{8} \mathrm{H}_{18}+\mathrm{O}_{2} \rightarrowSee Answer
  • Q15: Use the pictures shown to identify three ways of drawing hydrocarbon molecules. Then write the molecular formulas. (1 point each) See Answer
  • Q16: Use the periodic table to answer the following questions. (Round atomic masses to the nearest tenth unit.) \text { a. What is the molar mass of } \mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{2} \text { ? (. } 5 \text { point) } \text { d. What is the molarity of } 48.6 \mathrm{~g} \text { of magnesium ( } \mathrm{Mg} \text { ) ions in } 2 \mathrm{~L} \mathrm{H}_{2} \mathrm{O} \text { ? (.5 point) } \text { What is the number of molecules of } 140 \mathrm{~g} \text { of } \mathrm{CO} \text { ? } What is the number of moles of 27.6 g of lithium (See Answer
  • Q17: a. Identify the different parts of the chemical equation below. (2 points) \mathrm{A}(s)+\mathrm{B}(l) \rightarrow \mathrm{C}(g)+\mathrm{D}(\mathrm{aq}) b. Match each type of chemical reaction to the general form of the equation describing it. (2 c. Use the activity series of metals to predict the products of the followingsingle-replacement reaction. Explain your answer. (1 point) \mathrm{NiCl}_{2}+\mathrm{Fe} \rightarrow d. Use the solubility table to predict if a precipitate will form in the double-replacement reaction. \mathrm{CuSO}_{4}+2 \mathrm{KOH} \rightarrow \mathrm{Cu}(\mathrm{OH})_{2}+\mathrm{K}_{2} \mathrm{SO}_{4} Explain your answer. (1 point) e. Label the states of each compound in the reaction below. (2 points) \mathrm{CuSO}_{4}(\quad)+2 \mathrm{KOH}(\quad) \rightarrow \mathrm{Cu}(\mathrm{OH})_{2}(\quad)+\mathrm{K}_{2} \mathrm{SO}_{4}(\quad)See Answer
  • Q18: a. How can one tell if a chemical reaction is balanced? (.5 point) b. What information does a complete ionic equation give that the balanced equation doesn't show? (.5 point) c. What information does a net ionic equation give that the complete ionic equation does not show? (.5 point)See Answer
  • Q19: a. What is the difference between the empirical formula and the molecular formula? (.5point) b. How does one determine the molecular formula from the empirical formula? (.5 point)See Answer
  • Q20: a. How is the percent composition by mass determined? (.5 point) b. Determine the percent composition of each element in MgCl,. (1 point) i. Magnesium (Mg): (.5 point) ii. Chlorine (CI): (.5 point) c. Calculate the empirical formula from the given percent compositions. 82% nitrogen (N), 18% hydrogen (H) (2 points)See Answer

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