Answer:
Avogadro's number is the number of particles in one mole of anything. In this context, it is the number of atoms in one mole of an element. It's easy to find the mass of a single atom using Avogadro's number. Simply divide the relative atomic mass of the element by Avogadro's number to get the answer in grams.
6.02214086 x 10^23 mol^-1
Use a periodic table, It should help
It is called condensation
Answer: 300mm
Explanation:
30cm x (10mm/1cm) x <em>(1mm/1mm)</em> = 300mm
<em>Btw, I'm not sure about the </em><u><em>(1mm/1mm).</em></u>
