What process caused the different layers to earth to form

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

Which position represents spring in the southern hemisphere? a) b) c) d)