Final answer:
Approximately 4890.23 grams of Zn are equivalent to 4.5x10^25 atoms, calculated by first determining the number of moles using Avogadro's number and then multiplying by the atomic weight of Zinc.
Step-by-step explanation:
To calculate the mass in grams of 4.5x1025 atoms of Zinc (Zn), we start by using Avogadro's number, which states that 1 mole of any substance contains 6.022x1023 atoms. The atomic weight of Zinc (Zn) is 65.4 grams per mole.
We can find the number of moles by dividing the number of atoms given by Avogadro's number:
Number of moles = 4.5x1025 atoms / 6.022x1023 atoms/mole = 74.718 moles of Zn (Approx).
Now, multiply the number of moles by the molar mass of Zinc to find the mass:
Mass = 74.718 moles x 65.4 g/mole = 4890.23 grams of Zn (Approx).
Therefore, 4.5x1025 atoms of Zn have a mass of approximately 4890.23 grams.