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48-Anna____________________________(aprire) la porta per me stamattina.

49-________________________________ tre ore ieri per pulire la casa ieri!

59- Signora, non firmi l’assegno (the check)!

14- Lucilla e’ cosi bella ___________Maria.

60- Giovanni, vai al ristorante adesso (now)!

Chemical bonds are based on ______.

Consider the spontaneity of a chemical reaction, or whether it will proceed on its own without an external input (e.g., energy). For a reaction that is spontaneous, which of the following are true statements?

Consider the Gibbs free-energy change (delta G), a measure of whether a reaction is spontaneous or requires an energy input to proceed. Match each delta G value with the correct description.

Ions and polar molecules are ______ and stay in solution because of their interactions with water’s partial charges.

Look at the picture and choose one of the people to describe. Use your imagination to create details about the person. In addition to describing the person’s physical and personality traits, be sure to include the person’s age (create an age or at tell if s/he is old or young), two things s/he likes to do, and where s/he goes to do those things.