Answer:
a compound is a syllable in the outer world
Explanation:
The heat energy needed is 2928800J. Mass is given as 20 (kg)
Oxygen is Earth's most abundant element by volume in Earth's Orbit
Answer: b. accepts 
ions from acids
Explanation:
According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions 
when dissolved in water and an acid is defined as a substance which donates hydronium ions 
in water.
According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates ions and a base is defined as a substance which accepts ions.
Here water is donating ions, and thus act as acid and ammoia 
is accepting ions from water and thus is a base.
According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.
Thus base is a substance which accepts ions from acids.
...with the discovery and identification of the electron; and with the discovery of the first subatomic particle.
C'mon man, this is on the wiki page for J.J. Thomson, first paragraph.
