Is air a compound mixture or a element. compound
Explanation:
4 x 6.02 x 10²³ = 2.41 x 10²⁴
Both aluminum and chlorine have known charges, which are +3 and -1 respectively. To make them cancel each other out in charge, you would need 3 chlorine and for one aluminum, therefore

would be correct
Answer:
Freezing and condensation
Explanation:
Because they are exothermic, they release energy