Will a precipitate of PbCl2 (Ksp = 1.6 × 10–5) form in a solution with the following initial concentrations: [Pb2+] = 0.03 M and [Cl-]=0.02 M    

Consider the following chemical reactions. 1:       2 KClO4(s)     ⟶    2 KClO3(s)    +    O2(g) 2:       H2O(g)     ⟶   H2O(l) 3:       2 HgO(s)     ⟶    2 Hg(l)    +    O2(g) Which of the following reactions would you expect to have a negative entropy change?

(45 points) Work out the following problems (12, 13, and 14) on paper.  When you are done, take a photo of your work and upload it to CANVAS as a SINGLE jpeg or pdf.  You must SHOW ALL OF YOUR WORK (no work – no points).  You also must show ALL relevant reactions (equilibria and/or 100% complete). Report answers to three significant figures. Circle your final answers.   Determine the molar solubility of silver sulfide, Ag2S, in a solution that is 1.5×10–4 M AgNO3. The Ksp of silver sulfide is 6.2×10–30. Determine the change in entropy for the following reaction using the entropies of formations given:                   2 Pb(s)  +  O2(g)  

Which of the following insoluble salts will show no pH dependence in it’s solubility? 1.     BaC2O4 2.     SrSO4 3.     Fe(OH)3

Which of the following insoluble salts will show a pH dependent solubility? 1.     BaC2O4 2.     SrSO4 3.     Fe(OH)3

Problem 2 (5 points) – B-Tree (1) (1 point) Explain how to find the minimal key stored in a B-tree; (2) (2 points) Give the pseudo code of the predecessor function B-Pred(x, k) of a given key k stored in node x of a B-tree; (3) (2 points) Show the process of inserting the following keys into a B-tree with degree t = 2 in the given order using the algorithm in our Textbook: Your Family Name, FIU, SCIS, COP5407,  Final, Exam, and Spring2025 (you only need to show the relative positions of the keys without drawing the nodes).

Problem 1 (8 points) – Concepts on Data Structures and Analysis Techniques      Please keep your answers short (one sentence for the problem description and a couple of sentences for meaningful explanations). (1) (1 point) Briefly describe a simple problem where hash tables can be effectively used. (2) (1 point) Briefly describe a simple problem where B-trees can be effectively used. (3) (1 point) Briefly describe a simple problem where disjoint sets can be effectively used. (4) (1 point) Briefly describe a simple problem where average case complexity analysis is needed. (5) (1 point) Briefly describe a simple problem where amortized analysis is needed. (6) (1 point) Briefly describe a simple problem where greedy methods can be effectively used. (7) (1 point) Briefly describe a simple problem where dynamic programming is needed. (8) (1 point) Briefly describe a simple problem where graph search algorithms can be effectively used.

What is the formula for Calcium Sulfite?

Find an appropriate sentence for the blank below.    민지: 성희야, 방학 때 계절학기 들어? 성희:  ______________________________________________. 

Write more than three sentences what you would like to do if you were… “내가 만일 부자라면~”