hw-1[1].-fall-10

hw-1[1].-fall-10 - 1a. The element hydrogen has been placed...

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1a. The element hydrogen has been placed in the following groups in the periodic table: (IUPAC #s), 1, 17, 14 and floating above the main table, often coupled with He. Explain briefly the justification for each placement. Group 1………………………………………………………………………………………………………(1) Group 17……………………………………………………………………………………………………. .(1) Group 14……………………………………………………………………………………………………. .(1) Floating. .……………………………………………………………………………………………………. .(1) 1b. Cryolite, Na 3 AlF 6 , is produced in the following reaction. 6 NaOH + Al 2 O 3 + 12 HF 2 Na 3 AlF 6 + 9 H 2 O Calculate the yield assuming that the complete reaction of 287g of Al 2 O 3 produced 945g of cyolite.
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(7 points) 2a. What are the necessary conditions needed to obtain diffraction and interference effects from any form of radiation? Your response should mention the path lengths of waves as well as the dimensions of slits or obstacles. (4) ----------------------------------------------------------------------------------------------------------
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This note was uploaded on 01/16/2011 for the course CHEM 20A taught by Professor Scerri during the Fall '05 term at UCLA.

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hw-1[1].-fall-10 - 1a. The element hydrogen has been placed...

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