Use the drop-down menus to order the steps for writing chemical formulas. Balance the charges.
✔ 3

Identify the negative ion and charge.

Identify the positive ion and charge.

Use the information in the ratio to write the chemical formula.

Write the ratio of ions that balances the charges.

hi is the answer i need help

its 42

i say its d?

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.