I GIVE BRAINLIEST: Which of these is a characteristic of warm air? (5 points)

a It transfers energy through radiation.

b Its molecules are far apart.

c It sinks due to convection.

d It cools the land below it.

The answer is B. The air molecules of warm air have high energy and therefore collide with high energy. This causes them to move away from each other with increased temperatures. This is another reason why heating air in a closed container results to high pressure with increased heating.

Explanation:

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

if you're asking what comes out, it's steam.