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Problem- In the determination of the density of a rectangular metal bar, a student made the following measurements: length 8.53 cm, width, 2.4cm, height, 1.0cm, mass 52.7064g. Calculate the density of the metal to the correct number of significant figures.
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Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.140 M HClO (aq) with 0.140 KOH (aq)
the net atp yield for the complete oxidation of a single glucose molecule is 30 atp. phosphorolysis saves energy and
Depict a Lewis structure for the most significant resonance form of each ion showing formal charges and oxidation numbers of the atoms (a) AsO43- (b) ClO-2 Explain what are the oxidation numbers for As and O in ASO43-
What is the internal energy of an ensemble of 1 mole of particles having two non-degenerate electronic energy levels separated by 1000cm^-1 at 1310K.
Gel filtration of the protein gave an estimated molecular weight of 85000 g/mol. How many His residues are in the protein
Limestone (CaCO3) is used to remove acidic pollutants from smokestack flue gases. It is heated to form lime (CaO), which reacts with sulfur dioxide to form calcium sulfite
The pH of an aqueous solution containing only a monoprotic weak acid has a pH of 4.1. What is the concentration of hydronium ion, H3O+, in the solution? (a)2 x 10?3 M (b)2 x 10?4 M (c)8 x 10?4 M (d)8 x 10?5 M (e)0.61 M
Draw the lowest energy conformation of 3-ethyl-2,4,4-trimethylheptane, depicting the C3-C4 bond on a sawhorse.
Further recylcing reactions that would take the products back to some of the monomers. What reactions to use? What would you get as products
Problem- Propose a reason for why 2,4-DNP or semicarbazone derivates usually precipitate out of their ethanolic solutions.
how many NB molecules could you make by screwing one nut onto each bolt? show a balanced chemical equation and show all calculations for full credit
What are the n and l quantum numbers of the electron removed when Bi is ionized to Bi+ and would you expect element 115 to have ionization energy greater than, equal to, or less than that of bismuth? Explain.
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