In an experiment,0.327 g of zinc metal reacts to produce 0.407 g of zinc oxide.Using the conservation of mass law,predict the mass of reacting oxygen gas. 2 Zn(s)+ O₂(g) 2 ZnO(s)

Question

In an experiment,0.327 g of zinc metal reacts to produce 0.407 g of zinc oxide.Using the conservation of mass law,predict the mass of reacting oxygen gas. 2 Zn(s)+ O₂(g)  2 ZnO(s)

Quizplus · Accepted Answer

To use the conservation of mass law, we can assume that the mass of oxygen gas (O2) is equal to the difference between the mass of the zinc oxide produced and the mass of the original zinc metal used.

Mass of O2 = Mass of ZnO produced - Mass of Zn used
Mass of O2 = 0.407 g - 0.327 g
Mass of O2 = 0.080 g

Therefore, the mass of reacting oxygen gas is 0.080 g. The answer is choice B.

In an Experiment,0