I think it’s A, I’m so sorry if I’m wrong.
Answer:
C. An ion with a +2 charge
Explanation:
I guess
Answer:
The existance of dark energy was suggested to help explain measurements, using Type Ia supernovae as distance indicators, that the expansion of the universe is speeding up and its acceleration requires a source of energy. Scientists suggested that It may be a new form of energy for which there is not yet a theoretical explanation. quantum mechanics predict that it may be the vacuum energy associated with "empty" space itself.
Volume doesn't depend on what the substance is, only on how much of it there is.
