Question

1. co₂ # of molecules: 1 # of elements: name of element: # of atoms: total # of atoms: the #2 is a (coefficient or subscript) 14) 3cacl₂ # of molecules: 3 # of elements: name of element: # of atoms: total # of atoms: the #3 is a (coefficient or subscript)

Explanation:

Step1: Analyze CO₂

For CO₂, there are 2 elements, carbon (C) and oxygen (O). There is 1 carbon atom and 2 oxygen atoms, so the total number of atoms is 1 + 2=3. The 2 in CO₂ is a sub - script as it indicates the number of oxygen atoms in one molecule of CO₂.

Step2: Analyze 3CaCl₂

For 3CaCl₂, there are 3 molecules. There are 2 elements, calcium (Ca) and chlorine (Cl). In one CaCl₂ unit, there is 1 Ca atom and 2 Cl atoms. So in 3 CaCl₂ units, there are 3 Ca atoms and 6 Cl atoms, making a total of 3 + 6 = 9 atoms. The 3 in 3CaCl₂ is a coefficient as it indicates the number of CaCl₂ molecules.

Question	Answer
13) Name of element	Carbon, Oxygen
13) # of atoms (Carbon)	1
13) # of atoms (Oxygen)	2
13) Total # of atoms	3
13) The #2 is a	Subscript
14) # of elements	2
14) Name of element	Calcium, Chlorine
14) # of atoms (Calcium)	3
14) # of atoms (Chlorine)	6
14) Total # of atoms	9
14) The #3 is a	Coefficient

Answer:

Step1: Analyze CO₂

For CO₂, there are 2 elements, carbon (C) and oxygen (O). There is 1 carbon atom and 2 oxygen atoms, so the total number of atoms is 1 + 2=3. The 2 in CO₂ is a sub - script as it indicates the number of oxygen atoms in one molecule of CO₂.

Step2: Analyze 3CaCl₂

For 3CaCl₂, there are 3 molecules. There are 2 elements, calcium (Ca) and chlorine (Cl). In one CaCl₂ unit, there is 1 Ca atom and 2 Cl atoms. So in 3 CaCl₂ units, there are 3 Ca atoms and 6 Cl atoms, making a total of 3 + 6 = 9 atoms. The 3 in 3CaCl₂ is a coefficient as it indicates the number of CaCl₂ molecules.

Question	Answer
13) Name of element	Carbon, Oxygen
13) # of atoms (Carbon)	1
13) # of atoms (Oxygen)	2
13) Total # of atoms	3
13) The #2 is a	Subscript
14) # of elements	2
14) Name of element	Calcium, Chlorine
14) # of atoms (Calcium)	3
14) # of atoms (Chlorine)	6
14) Total # of atoms	9
14) The #3 is a	Coefficient