Answer:
Element: Pure substance consisting of one type of atom. Compound: Pure substance consisting of two or more different atoms. Mixture: Two or more different substances not chemically combined.
Explanation:
PLEASE ADD ME AS BRAINLIEST
1st one
2_2_2
2nd one
3_1_1_3
i looked it up
V=0.3×22.4=6.72 liters hope this helps