Answer:
The heat of vaporization of water is 2257-J/g - each grams must release 2257-J of thermal energy. When water condenses its temperature remains constant.
Q = m x Hv ===> 50-g x 2257-J/g = 112,850-J = 112.9-kJ
Homologous structures and vestigial struactures both show the branched adaptation that occurs over generations.
Answer:
basic
Explanation:
like water to an acid or na2co3 or even diluting an acid causes its ph to increase
Answer:
2
Explanation:
The compounds XCl₂ and X₃N₂ shows that the valency of X is 2. If they are ionic compounds then X is a metal. The metals having valency=2 mostly reside in group-2. Exapmle: MgCl₂ and Mg₃N₂.