Aspirin is a compound that contain nine carbon atoms, eight hydrogen atoms and four oxygen atoms. It is used as a pain killer. An aspirin tablet contain 1.25x 10^30 molecules. How many moles of the compound are present in the tablet also write its empirical and molecular formulas.​

A__ is two or more substances that are together in the same place but are not chemically combined

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.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?