Puffy Chalmers was in his room, admiring his Mr. Drought mask, when his mother, Cookie Chalmers, barged into his room. She was so tired of the mask, she ripped it up and threw the pieces into a metal trash can. Then she pulled a bottle of acid out of her purse, and poured it on the mask pieces causing them to bubble, smoke, and change color. Did she change the mask physically or chemically? Explain your answer using evidence and your knowledge of physical and chemical changes. help

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !