Does iron always have a charge of 2+ when it forms an ion

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.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at