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Problem A. Step 1. Determine the number of atoms for each element

/in /by

Problem A. Step 1. Determine the number of atoms for each element present in the following molecule:

Na2CO3

Step 2. Using the periodic table of elements, determine the molar mass for this molecule

step 3. Show your work please 

Problem B. 

Step 1. Determine the number of atoms for each element present in the following molecule: Mg(NO3)2

Step 2. Using the periodic table of elements, determine the molar mass for this molecule

Step 3. Show your work please. 

 
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