4. What coefficients do you need to balance the following equation? CH4 + O2 + CO2 + H2O
O 1, 2, 1, 2
O 2, 1, 1, 1
O 1, 1, 1, 1
O 2, 1, 2, 2

The answer is true for your question.

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.

Idon’t know what the answer is i wish i could