In order to determine, Order of reaction, we have to add all the exponents written in the Chemical form, on the Reactant species.
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Elements which composed of an equal amount of three components protons, neutrons and electrons are considered neutral elements. example of neutral elements are hydrogen, helium, lithium and beryllium...
Answer:
24.5
Explanation:
15/6.3 => 2.38 half lives passed.
.5^2.38 => 0.19198 decimal representation of the percentage that is left over after 2.38 half lives have passed.
0.19198 *128 = 24.5 mg of the material remaining.
Glacial striations show the direction a glacier is moving, and it suggests that the glacier flowed from a single location.