1 Hydrogen 1s1
2 Helium 1s2
3 Lithium 2s1
For the first part, use the question M=mol/vol (liters)
To do this, you have the given 1.6 M solution
divide the 360g by the molar mass of ethanol (44.07) to get moles
360/44.07=8.16 mol
so
1.6M = 8.16 mol/x vol
volume: 5.1 Liters
It has a double C=C bond so that means it's unsaturated, but it can also be a cyclic compound with only simple C-C bonds