Question

why a solid body of mass 25kg has equal mass in space also but posses zero weight

Answer 1

because gravity there is 0 and also F= MG SO INSTEAD HAVING A MASS HIS WEIGHT WILL BE O . hre is your answer buddy and mark as brainlest

Answer 2

This happens because mass is a property of the object which remains constant, i.e mass of an object will be same whether it is on earth or moon or mars or space.
But weight depends upon the gravitational force. Weight on moon will be different than that on earth as gravity on both is different. As in space, there is no gravity, hence weight in space is zero.
Also Weight=mass X acceleration due to gravity