4.It refers to the molten materials that are still inside the volcano. A. Lava B. Magma C. Smoke D.Tephra
5. It is the mass of one atom of the element expressed in atomic mas units (amu).
A. Atomic mass B. Avogadro constant C. Molar mass D. Molecular mass
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Answer:
4.A
5.D
6.B
Explanation:
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