Asolution of na2co3 is added dropwise to a solution that contains 1.23×10? 2 m fe2 and 1.46×10? 2 m cd2 . what concentration of co32? is need to initiate precipitation? neglect any volume changes during the addition.

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What happens to the temperature of a substance when the average kinetic energy of its particles increases?

Do polar molecules have ionic bonds?