The number of atoms would be 292 X Avogadro's Number X number of atoms per molecule of the substance whose moles are in question. The latter value must be specified before a complete answer can be given.
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In sulfur trioxide (SO3), there are 1 sulfur atom and 3 oxygen atoms. Therefore, in 2.00 moles of SO3, there would be 2.00 moles of sulfur atoms and 6.00 moles of oxygen atoms.
There is 1 mol of calcium atoms in 1 mol of calcium carbonate (CaCO3). Therefore, in 2.5 moles of CaCO3, there are 2.5 moles of calcium atoms.
To find the number of moles, divide the given number of atoms (1.204x10^24) by Avogadro's number (6.022x10^23). Therefore, 1.204x10^24 atoms of calcium is equal to 2 moles.
There are 4.5 moles of sodium fluoride in 4.5 moles of sodium fluoride.
There are 2.41 x 10^24 atoms in 4.0 moles of sodium (Na). This number is derived by multiplying Avogadro's number (6.022 x 10^23 atoms/mol) by the number of moles.