Answer:
D, Li2S
Explanation:
This is because Lithium, which is in group IA of the periodic table, has a charge of +1. Sulfur will have a charge of -2 because it is in group 6A in the periodic table, which means to balance these out, there needs to be 2 lithium ions which would result in a charge of +2. With Lithium now having a charge of +2 due to having two atoms in the compound, and sulfur already having a charge of -2 as one atom, these two cancel out meaning the compound is neutral.
Testable, that is always required for a hypothesis. Otherwise, how can you prove it?
Answer:
Bohr placed the electrons in distinct energy levels. Rutherford described the atom as consisting of a tiny positive mass surrounded by a cloud of negative electrons. Bohr thought that electrons orbited the nucleus in quantized orbits. Also, rutherfords was just a hypothesis while Bhor took the time to make his an experiment
Explanation:
It is known that at the equivalence point,
Equivalent of acid = equivalent of base ......... (A)
and, Equivalent = 
Therefore, equivalent of acid is calculated as follows.
Equivalent of acid = 
.......... (1)
Equivalent of base = 
............ (2)
Hence, using equation (A) we will calculate the concentration as follows.
M = 0.16 M
Thus, we can conclude that concentration of the unknown weak acid solution 0.16 M.
