How many molecules are there in 21.4 grams of Ca(OH)2?
1 answer:
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2.4 x 10²² atoms
<h3>Further explanation</h3>Atomic mass is the average atomic mass of all its isotopes
In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu
So the atomic mass obtained is the mass of the atom relative to the 12th carbon atom
mass single Uranium atom=4.7 x 10⁻²² g
then for 111 mg=0.111 g