The density of the stone is 5 because the formula is mass/volume and the volume is 5 and the mass is 25
I just wanna know what does that even mean
A nanoparticle is larger than an atom. A nanoparticle is usually made from a few hundred atoms. These particles range from 1 nanometers to 100 nanometers. On the other hand an atom ranges from 0.1 nanometers to 105 nanometers. Using the sizes above, one can clearly see and understand that an atom is smaller.
Take 15/100 X 75 = The answer