Question

Wₕₐₜ ᵢₛ cₕₑₘᵢcₐₗ cₕₐₙgₑ?⠀⠀​

Answer 1

Answer:

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions

Answer 2

• ᴀ ᴄʜᴇᴍɪᴄᴀʟ ᴄʜᴀɴɢᴇ ɪs ᴀ ᴄʜᴀɴɢᴇ ᴏғ ᴍᴀᴛᴇʀɪᴀʟs ɪɴᴛᴏ ᴀɴᴏᴛʜᴇʀ , ɴᴇᴡ ᴍᴀᴛᴇʀɪᴀʟs ᴡɪᴛʜ ᴅɪғғᴇʀᴇɴᴛ ᴘʀᴏᴘᴇʀᴛɪᴇs .