Answer:
No.
Explanation:
1. Volume of a rice grain
There is no standard for the size of a rice grain, so let's make an arbitrary assumption.
An average rice grain behaves as if it were a rectangular solid with dimensions 7 mm × 2 mm × 2 mm.
The volume of one rice grain is
V = lwh = 7 mm × 2 mm × 2 mm = 28 mm³
Convert to cubic metres
:

2. Volume of the room
V = lwh = 30.0 m × 8.5 m × 3.5 m = 890 m³
3. Volume of a mole of rice

4. Conclusion
The room is not big enough to hold a mole of rice.
If you work it out, you will find that it takes about
20 000 000 000 000 (twenty trillion) rooms to hold a mole of rice.