Which is the correct answer? (I already tried to do it)

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

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.

Define a is a tiny pavket of energy