What is the mass of 5.22×10^21 platinum atoms? ?

1.69g

Explanation:

To solve the problem you need to know the Avogadro´s number and the molar mass of the Platinum.

The Avogadro´s number is . For the platinum it means that there are atoms of platinum for each mol.

And the molar mass for the platinum is , that is the mass in grams of each mol of platinum.

So, with this information we can solve the problem as follows:

of Pt

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

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