Final answer:
The total number of molecules in 2CaCl2 is 1.2044 x 10^24 molecules. There are 4 calcium (Ca) atoms and 4 chloride (Cl) atoms present in 2CaCl2.
Step-by-step explanation:
a. To determine the number of total molecules, we need to use Avogadro's number, which is 6.022 x 10^23 molecules per mole. Since there are 2 moles of CaCl2 (written as 2CaCl2), we can multiply the Avogadro's number by 2 to get the total number of molecules. Therefore, the total number of molecules is 2 x 6.022 x 10^23 = 1.2044 x 10^24 molecules.
b. In 2CaCl2, there are 2 calcium (Ca) atoms per molecule. Since we have 2 moles of CaCl2, we can multiply the number of moles by 2 to get the number of calcium atoms. Therefore, the number of calcium atoms is 2 x 2 = 4 atoms.
c. In CaCl2, there are 2 chloride (Cl) atoms per molecule. Since we have 2 moles of CaCl2, we can multiply the number of moles by 2 to get the number of chloride atoms. Therefore, the number of chloride atoms is 2 x 2 = 4 atoms.