Question

I need help with the whole worksheet

A solar cell can be constructed by depositing copper(II) sulfide from an aqueous solution directly onto certain n-type silicon semiconductors. The precipitation of CuS may be represented by the following unbalanced equation: In one experiment, a 22.2 mm by 15.5 mm solar cell was prepared using 6.00 mL of 0.105 M thioacetamide and 2.00 mL of 0.101 M copper(II) acetate (the source of the Cu^2+ ions). a. Write the balanced chemical equation, including physical states. b. Draw Lewis structures for thioacetamide and acetamide. c. List all the intermolecular forces in thioacetamide and acetamide, and predict which should have the higher melting point. Explain. d. Report the density of CuS to at least three significant figures. Cite your source. e. what is the molar concentration of thioacetamide and copper(II) acetate the instant they are mixed? (Assume the volumes are additive.) f. what is the maximum amount of CuS, in grams, that can form (precipitate)? g. If the (actual) yield of CuS was 79.9%, what mass of CuS was produced? what volume (in cm^3) was produced? h. If all of the CuS produced was deposited as an even layer on one side of the solar cell, how thick was the layer of CuS? i. Assuming a formula unit of CuS is a perfect cube, how many formula units thick was the CuS in the solar cell?

Answer 1

Physical stades is g gas S之Solid hioacetani Heru sutfhur have valance electhron ¡ท outh Colly and Nihegen have svalrmq sphur bound with car bo by doubl Bond heru for y eleckon s balande similary fo ibogen 3 bounded with hycdrogen and and 2. balona ee) elachen issues f acetami Hey aem have 4 valena and aHachd ith eluchon

C. All the intermolecular forces acting in thioacetamide due to covalent bond between C and H ,S,N molecule, hydrogen bond between N and H molecule and polarity of S molecule similarly for acetamide covalent bond between C and N,O,H, and hydrogen bond between N and H ,polarity OF O molecule.

The polarity of S molecule in thioacetamide is higher than the polarity of O molecule in acetamide due to this the melting point of thioacetamide is higher than melting point of acetamide.