Option “A” is the crest of the wave because it’s the maximum value of upward displacement within a cycle.
Answer:
Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.
Explanation:
Mass number = protons + neutrons. 12 + 11 = 23.
Molar mass K₂SO₄ = 174.259 g/mol
moles
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