Velocity = 15 m/s
90/2 = 45 m
45/3 (seconds to reach) = 15 m
Answer: C
Explanation:
Indicators are organic weak acids or bases with complicated structures.
Answer: "exothermic" .
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Answer:
B
Explanation:
sliver is being reduced (Ag+ + e‐ ----> Ag) while,
magnesium is being oxidized (Mg -----> Mg2+ + 2e‐)