Please help 9.2.1 project in science just ned an example

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

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

Exit what is the density of an object having a mass of 5.0 g and a volume of 45.0 cm3?