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A radioactive sample contains 2.2 mg of pure Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. which has half life period of 1224 seconds. Calculate (i) the number of atoms present initially. (ii) the activity when 5μg of the sample will be left.
Asked by Topperlearning User | 09 Jul, 2014, 06:46: PM
answered-by-expert Expert Answer

 

(i) By definition 11g of carbon Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. contains NA = 6.023 x 1023 atoms

number of atoms in 2.2 mg = 2.2 x 10-3g of Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. will be

                                        = Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

(ii) Activity A = λN

Half life T1/2 =Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Activity A = Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Where N = Number of atoms in 5μg (= 5 x 10-6g) which is equal to

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

 

Answered by | 09 Jul, 2014, 08:46: PM

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