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OpenStudy (anonymous):
chemistry** determine the number of mole of oxygen atoms in 75.00grams of K2Cr2O7 molar mass of K2Cr2O7 is 294.2g/mole
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sam (.sam.):
\[75g K _{2}Cr _{2}O _{7} X\frac{1molK _{2}Cr _{2}O _{7}}{294.2gK _{2}Cr _{2}O _{7}} X\frac{1molO}{1molK _{2}Cr _{2}O _{7}}=0.255\]
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