1. (15 points). A metallic spherical gas weather balloon (non-expanding material) has a radius of 1.00 meter and is filled with a mixture of gases in which 63.00% of the gas particles are helium atoms, and 37.00% of the particles are neon atoms at STP conditions. Vsphere=(4/3)r3 a. calculate the masses of the individual gases in the balloon. b. calculate the density of the gas mixture in the balloon. c. the balloon is made of a lightweight material with a mass of 500.00g. Calculate the density of the gas filled metallic weather balloon