<span>The valence electrons occur in the outer shell of the atom. </span>
Answer:
The process in which heat flows by the mass movement of molecules from one place to another is C) convection.
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Answer:
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Explanation:
Answer:
Explanation:
Let be % of at time (time in minutes).
Amount of in room=Volume of room
Rate of change of in room=Volume of room x
Rate of inflow of =
Rate of outflow
Therefore rate of change of is
% rate of change is
Therefore we have:
Integrate both:
InIn
Raise both sides to base ,
Initially, there's only 0.25% of ,
Now substitute and