How do we find the formula mass of "chromic sulfite", Cr_2(SO_3)_3?

1 Answer
anor277
Feb 17, 2017

"Of chromic sulfite................?"

Explanation:

We add the atomic masses of the the given constituents......of Cr_2(SO_3)_3:

=[2xx52.00(Cr)+3xx32.06(S)+9xx16.00(O)]*g*mol^-1

=344.18*g*mol^-1.

All I have done is to take the atomic masses from the Periodic Table, and added them together appropriately. You are not expected to remember any of the atomic masses (tho' a few will stick).

What is the molar mass of Cr_2(SO_4)_3*18H_2O?

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