HELP!!! How much heat is required to change 40 g of ice (H2O) at 225 K to vapor (steam) at 387K?

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?