A 2.45 g sample of calcium completely reacts with oxygen to form 3.43 g of calcium oxide. What is the mass percent composition of calcium in calcium oxide.

explanation:

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but