Question

One of the first nuclear bombs based on the fission of U-235 had a maximum yield of 7.5 x10¹³ J.  If the fission of U-235 releases 1.8 × 10¹³ J/mol, approximately what mass of U-235 was used in this bomb?  (U-235 has a molar mass of 235.04 g/mol)

Answer 1

= 7.5 × 10¹³/1.8 × 10¹³ = 4.167

= 4.167 mol × 235.04

= 979.41g