Suppose you have a container filled with iron and sand You can separate the sand if uou so this is s

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

fe 55.85 g/mol and h2o 18.02 g/mol.

i wish i could but this one is weird give me abc and i can solve it.

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