Dear Student,
Given,
Mass of the packet, m = 500 g
Volume of the packet, V = 350 cm3
Density of water, d = 1 g/cm3
Volume of water displaced = volume of the packet = V = 350 cm3
So,
mass of water displaced =
Since the mass of water displaced is less than the mass of the packet, the buoyancy force will be less than the weight of the packet.
So, the packet will sink.
Regards