What is the formula unit for a compound made from pb^4+ and oxygen

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction