Which of the following ions will always be a spectator ion in a precipitation reaction?

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

What is the percent by mass of oxygen in fe2o3

What substance has a mass of 9.5g and volume of 2.1cm^3