The mass of 1 curie of U-234 is :

Options

A. `3.7xx10^(10)g`
B. `2.348xx10^(-23)g`
C. `3.7xx10^(-10)g`
D. `1.438xx10^(-11)g`

Answer

D

Explanation

1 Curie of a substance is the amount of substance which gives `3.7xx10^(10)` disintegrations per second. Number of disintegrations is proportional to the number of atoms so that `6.02xx10^(23)` atoms of U-234 has mass =234g `3.7xx10^(10)` atoms of U-234 has mass
`=(234)/(6.02xx10^(23))xx3.7xx10^(10)`
`=1.438xx10^(-11)g`