Can you help me (only used these terms) Molecule
Subscript
Element
Solid
Compound
Liquid
Pure substance
Mixture
Vapor (gas)

Subscript- tells how many of each atom there are in a chemical formula

element- a substance containing only one type of atom

solid- a state of matter where particles vibrate and are not free to move

compound- two or more atoms chemically bonded together

liquid- a state of matter in which particles slip past each other

pure substance- all of the smallest individual pieces are the same

mixture- different types of atoms or molecules that are physically mixed together

vapor- a state of matter in which molecules are far apart

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try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high