How many moles of hgo are needed to produce 250.0g of o2

The molar mass of HgO is 216.59 g/mol. The molar mass of O2 is 32.00 g/mol.

Your answer will be 15.63

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

The answer is the first option just took the test