Answer:
In this problem,it is very important to use
the constant called Avogradro's number
which is equal to 6.022 * 10^23 particles
per mole. For any kind of substance,
whatever it is, this is the number of
particles that constitute 1 mole.
This means that 6.022x10^23 grains is
equivalent to 1 mole of rice grain.
1.807 10^24 grains (1 mole/
6.02210^23) 3 moles of rice grains
