Answer:
I, III, and V
Explanation:
All five options are correct.
However, your instructor is probably expecting the answer I, III, and V.
These three elements are on the left-hand side of the Periodic Table. Thus, they tend to lose electrons and form positive ions most easily.
H is the most reluctant to form a cation. Its first ionization energy is 1100 kJ·mol⁻¹.
However, F and He can lose electrons to form cations.
It takes only 1700 kJ·mol⁻¹ to remove an electron from F. However, F tends to add electrons to get a complete valence shell.
Even He, with a complete valence shell, will give up a valence electron for the expenditure of only 2400 kJ·mol⁻¹.
Answer: 2.0 grams per cubic centimeter
Explanation: i had this
Hydrazine and UDMH are both organic nonpolar liquids. Despite having different densities, their miscibility with each other allows the mixture of the two to homogenize. This means that the concentration of hydrazine and UDMH in all parts of the mixture are the same. This is also the reason why the mixture is called Aerozine 50 because the components are not distinguished but rather, stay well mixed in the system providing a stable set of properties unique to Aerozine 50.