Which of the following pairs of compounds contain the same number of atoms, but different kinds of atoms?

A) CO2 and CaCl2

Explanation: CO2 is the chemical formula for carbon dioxide. Carbon dioxide contains a total of three atoms but two different atoms. CO2 contains one carbon atom (C) and two oxygen atoms (O2). One carbon atom plus two oxygen atoms is equal to a total of three atoms.

On the other hand, CaCl2 is the chemical formula for calcium chloride. CaCl2 contains one calcium atom and two chlorine atoms giving a total of three atoms.

Therefore CO2 and CaCl2 have the same number of atoms but different kinds of atoms.

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a