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CBSE Class 12-science Answered

Lead sulphate crystals has NACL struclure.what is its density ?the edge length of PbS crystal is 500pm.
 
 
 
 
PLEASE SOLVE THIS NUMERICAL WITH HELP OF LOG TABLE AND ALSO EXPLAIN EACH STEP
WAITING FOR REPLY.
Asked by Shahwar | 07 Jun, 2015, 11:16: PM
answered-by-expert Expert Answer
begin mathsize 11px style Given colon straight M space equals space 239.2 space amu straight a space equals space 500 space pm space equals space 500 space cross times space 10 to the power of negative 10 end exponent space cm straight Z space equals space 4 straight N subscript 0 space equals space 6.022 space cross times space 10 to the power of 23 Formula colon space space straight rho space equals space fraction numerator MZ over denominator straight N subscript 0 straight a cubed end fraction Solution colon therefore space straight rho space equals space fraction numerator 239.2 space cross times space 4 over denominator 6.023 space cross times space 10 to the power of 23 space space left parenthesis 500 space cross times 10 to the power of negative 10 end exponent right parenthesis cubed end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space equals space log space 239.2 space plus space log space 4 space minus space log space 6.023 space minus space 23 space minus space left parenthesis 3 space cross times space log space 5 right parenthesis space minus space 6 space plus space 30 space space space space space space space equals space 2.3787 space plus space 0.6020 space minus space 0.7798 space minus space 23 space minus space 2.0967 space minus space 6 space plus space 30 log space equals space 1.1042 therefore space straight rho space equals space Antilog space left parenthesis 1.1042 right parenthesis space space space space space space space space space space space space space space space space space space space space space space space equals 12.7115 Answer colon space The space density space equals 12.71 space straight g space cm to the power of negative 3 end exponent end style
Answered by Hanisha Vyas | 08 Jun, 2015, 10:54: AM

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