1.

The number of millimoles of ""_(6)^(14) C equivalent to one milicurie , if t_(1//2) = 5570 year and1 curie = 3.7 xx 10^(10) dps is

Answer»

`1.56 xx 10^(-2)`
`3.12 xx 10^(-2)`
`4.34 xx 10^(-2)`
`7.80 xx 10^(-2)`

SOLUTION :`A = lamdaN,1 xx 10^(-3)xx 3.7xx 10^(10)= ((0.693 )/(5570 xx 365 xx 24 xx 60 xx 60 )) xxN_t`
`N_t= ((1 xx 10^(-3) xx 3.7 xx 10^(10) xx 5570 xx 365 xx 24 xx 60 xx 60 )/( 0.693 )) =((7522.285 )/( 0.693 )) xx 86400 xx 10^(10)`
`=(( 7.522285 xx 10^3 xx 8.64 xx 10^4 xx 10^(10))/( 0.693 )) =( 7.522285 xx 8.64 )/( 0.693 )xx 10^(17)= 93.784 xx 10^(17)= 9.3784 xx 10^(18)`


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