Q1: How many grams of dipotassium phtalate (MW = 242.31 g/mol) should be added to 30.00 mL of 0.400 M HClO4 to give a pH of 5.10 when the solution is diluted to 500 mL?Q2: What is the pOH of:(a) a 0.0100 F solution of phtalic acid?(b) a 0.0100 F Read more…
Which of the following pairs of reactants will react together to produce water (H2O) as one of the products? NaNO3 and H2O Mg3(PO4)2 and Al2O3 Fe(OH)3 and H2SO4 Li2O and Ba(OH)2Question 2 (Multiple Choice Worth 2 points)Which of the following reactant pairs will not react together to produce a reaction? Read more…
What is usually needed to help a decomposition reaction to occur? a more active second reactant the addition of energy the addition of an enzyme a lower temperatureQuestion 2 (Multiple Choice Worth 2 points)Which of the following is a product formed when CaCO3 decomposes? Ca2 O2 CO2 CaO2Question 3 (Multiple Read more…
Question 1 (Essay Worth 5 points)Use complete sentences to explain how you determined the mass of oxygen in the compound produced in the virtual lab and how the mass of each element can be used to determine the empirical formula of the compound.Question 2 (Multiple Choice Worth 3 points)Which of Read more…
Mass Relationships for CompoundsAnswer all assigned questions and problems and show all work.How many atoms are there in 5.10 moles of sulfur (S)?How many moles of calcium (Ca) atoms are there in 77.4 g of Ca?What is the mass in grams of 1.00 1012 lead (Pb) atomsDescribe how you would Read more…
Place the species in order of increasing bond length and bond energy. (Use the appropriate < = or > symbol to separate substances in the list.)CN^- CN CN^+Use the figure attached to answer the following questions.(a) Would the bonding molecular orbital in HF place greater electron density near the H Read more…
1. A cation exchange resin in the acid form can be represented RSO3H. Water containing a lot of sodium chloride is passed through the resin (contained in a ion exchanger). a) Show the reaction that would occur. b) Would you expect the conductivity of the water to change? If so Read more…
Pursue excellence and success will follow pants down.I can just remember this line while I was watching the documentary on Fermat s Last Theorem. This was said by Rancho on the movie 3 idiots which was a story about pursuing one passion to live a happy and fulfilled.This docoumentary was Read more…
1. Describe the components and internal systems that enable the dental porcelain furnace to operate successfully.2. Discuss the mechanisms that bond porcelain materials to analloy interface?3. Compare the production of porcelain laminate veneers using a refractory die material or the use of a platinum foil matrix.4.Describe in detail the internal Read more…
7. What is the Roman numeral that should be used in the following: silver (_______) sulfide?A. IB. No Roman numeral should be used here.C. IID. III8. Why is pure silicon a poor conductor at room temperature?A. It is a metal.B. Its valence electrons are held tightly within a crystal structure.C. Read more…