A single atom of platinum has a mass of 3.25x10^-22g. What is the mass of 6.0x10^23 platinum atoms?

194.36 g

Solution:

Data Given:

Number of Atoms = 6.0 * 10²³

A. Mass of Platinum = 195.08 g. mol⁻¹

Step 1: Calculate Moles of Platinum,

Moles = Number of Atoms : 6.022 * 10²³ Atoms. mol⁻¹

Putting value,

Moles = 6.0 * 10²³ Atoms : 6.022 * 10²³ Atoms. mol⁻¹

Moles = 0.9963 mol

Step 2: Calculate Mass of Platinum:

Moles = Mass : M. Mass

Solving for Mass,

Mass = Moles * M. Mass

Putting values,

Mass = 0.9963 mol * 195.08 g. mol⁻¹

Mass = 194.36 g