How many moles of oxygen molecules, O2, are required to produce 0.268 mol of K2Cr2O7? Show your work.
hint:
7O2->2K2Cr2O7
use the mole ratios (coefficients) to convert 0.268 mol of K2Cr2O7 to mol of O2
7O2->2K2Cr2O7
use the mole ratios (coefficients) to convert 0.268 mol of K2Cr2O7 to mol of O2