Given a 6.80 g sample of H2O how many grams of oxygen is produced assuming the decomposition goes to completion

6.0444g

the formula must be after balancingknown as 36(mass) of H2O can produce 32(mass) of O2so 6.80g of H2O can produce (x)g of oxygen

What are the options? physical property can be color, smell, opacity, viscosity, density, infra red spectrum, melting and boiling points, attraction and repulson to magnets, etc.

Ijust took the quiz. their is no coefficient needed. : )