# Molecules

The temperature of an open room of volume $$30$$ $$m^3$$ increases from $$17 ~ ^\circ C$$ to $$27$$ $$^\circ C$$ due to sunshine. The atmosphere pressure in the room remains $$1 \times 10^5$$ Pa. If $$n_i$$ and $$n_f$$ are the number of molecules in the room before and after heating, then $$n_f - n_i$$ will be:

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