Which type of substance is graphene? a. atom b. mixture c. molecule d. compound

Calculate the number of molecules present in 0.750 mol of mgo.

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.

Name the element in group 17, period 2. (periodic table)