Which of these is an example of a physical change -baking a cake -toasting bread -grinding pepper -lighting up a grill

Your best choice would be grinding pepper

Grinding paper because a physical change is where it’s still the same subsctance, not a chemical because chemical is when it changes into a new substance like toasting bread, the burnt parts are a new substance, it changes it. But grinding pepper isn’t changing the substance it’s just making it into little pieces

Answer(28.02g/mol);