Answer: option c. Gold
Explanation:
Mass of calcium = 12g
Molar Mass of calcium =40g/mol
n = Mass / Molar Mass = 12/40 = 0.3mol
Mass of platinum = 12g
Molar Mass of platinum = 195g/mol
n = Mass / Molar Mass = 12/195 = 0.062mol
Mass of Barium = 12g
Molar Mass of Barium = 137g/mol
n = Mass / Molar Mass = 12/137 = 0.088mol
Mass of Gold = 12g
Molar Mass of Gold = 197g/mol
n = Mass / Molar Mass = 12/197 = 0.061mol
Mass of silver = 12g
Molar Mass of silver = 108g/mol
n = Mass / Molar Mass = 12/108 = 0.111mol
From the above, gold has the lowest number of mol i.e 0.061mol
The gold vial has the fewest moles of metal atoms.
To calculate which metal will have the least amount of moles, it is necessary to know the molar mass of each one:
As, to calculate the number of moles using the mass, we have the following formula:
[tex]n =\frac{mass}{molar.mass}[/tex]
It can be said that the element with the highest molar mass will have the fewest moles.
Thus, this element is gold with 197g/mol.
Learn more about mole calculation in: brainly.com/question/15209553
