The air that we breathe contains oxygen, water, nitrogen, dust, pollen, pollution, and other materials. we can clean air using an air filter. air is most likely a a compound an element a mixture a molecule

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

All motion is caused by force? true or false

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?