What is the molar mass of #K_2Cr_2O_2#?

1 Answer
anor277
Jul 18, 2018

Well, what are the molar masses of potassium, chromium, and oxygen individually...?

Explanation:

And a quick glance at the Periodic Table tells you...

#Cr, 52.00*g*mol^-1#

#K, 39.10*g*mol^-1#

#O, 16.00*g*mol^-1#.

You simply add these masses appropriately to get the molar mass of the compound. Note that compound itself is PROBABLY #K_2Cr_2O_7#, or #K_2CrO_4#....#K_2Cr_2O_2# as written is a bit suspect...

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