Answer:
B
Explanation:
hydrogen it's atomic number (Z) is
recall from the formular of Energy
E = -2.178 x 10-18/Z
= -2.178 x 10-18/1
E = -2.178 x 10-18
(9.8/1) x 1mol/40g = 0.245 mol
The answer is elements. Hope i could help.
Answer:
Answer: a chemical Change, because a gas is being formed
Answer:
A rock is a naturally occurring solid mixture of one or more minerals or organic matter.
Explanation:
A mineral is naturally formed, inorganic, solid, with a fixed chemical composition, and crystalline structure. A rock at the surface of the Earth would need to be weathered down into sediments.
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