What is the molar mass of K_2Cr_2O_2?

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...

$C r , 52.00 \cdot g \cdot m o {l}^{-} 1$

$K , 39.10 \cdot g \cdot m o {l}^{-} 1$

$O , 16.00 \cdot g \cdot m o {l}^{-} 1$.

You simply add these masses appropriately to get the molar mass of the compound. Note that compound itself is PROBABLY ${K}_{2} C {r}_{2} {O}_{7}$, or ${K}_{2} C r {O}_{4}$....${K}_{2} C {r}_{2} {O}_{2}$ as written is a bit suspect...