Answer :
Final answer:
In a 208g sample of cobalt, by using the molar mass of cobalt and Avogadro's number to perform the calculations, there are approximately 2.124 x 10^24 atoms of cobalt.
Explanation:
To determine the number of atoms in a given mass, we can utilize the concept of molar mass and Avogadro's number. Cobalt has a molar mass of about 58.93 grams/mole. First, calculate the number of moles in the 208g sample. Divide the mass of the sample (208g) by the molar mass of cobalt (58.93 g/mole) which gives approximately 3.53 moles of cobalt.
According to Avogadro's number, each mole of a substance contains approximately 6.022 x 10^23 entities (atoms in this case). Multiply the number of moles calculated earlier by Avogadro's number: (3.53 moles) * (6.022 x 10^23 atoms/mole) to result in approximately 2.124 x 10^24 atoms. Hence, in a 208g sample of cobalt, there are approximately 2.124 x 10^24 atoms of cobalt.
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