What is the mole fraction of 30 g of NaCl in 150 g of water?

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

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.

Element before carbon on the periodic table