Question

name: nolan joscakz date: word
* counting atoms practice *
use your counting atoms notes and periodic table to help you on this assignment.
you may use a calculator if you need it. showing the work is strongly recommended,
but not required.
section a: identify the coefficient and subscripts in the following formulas.
if there is not one, means 0.

1. 3mgcl₂

coefficient:
subscript for mg: 1
subscript for cl:

1. v₂o₅

coefficient:
subscript for v:
subscript for o: 5

1. 4k₂co₃

coefficient: 4
subscript for k:
subscript for c: 1
subscript for o:

1. hc₂h₃o₂

coefficient:
subscript for h:
subscript for c:
subscript for h:
subscript for o:

Explanation:

Step1: Identify coefficient and sub - scripts for 3MgCl₂

The coefficient is the number in front of the chemical formula, which is 3. The sub - script for Mg is 1 (when no sub - script is written, it is 1), and the sub - script for Cl is 2.

Step2: Identify coefficient and sub - scripts for V₂O₅

There is no number in front, so the coefficient is 1. The sub - script for V is 2 and for O is 5.

Step3: Identify coefficient and sub - scripts for 4K₂CO₃

The coefficient is 4. The sub - script for K is 2, for C is 1, and for O is 3.

Step4: Identify coefficient and sub - scripts for NaC₂H₃O₂

There is no number in front, so the coefficient is 1. The sub - script for Na is 1, for C is 2, for H is 3, and for O is 2.

Answer:

1. coefficient: 3, subscript for Mg: 1, subscript for Cl: 2
2. coefficient: 1, subscript for V: 2, subscript for O: 5
3. coefficient: 4, subscript for K: 2, subscript for C: 1, subscript for O: 3
4. coefficient: 1, subscript for Na: 1, subscript for C: 2, subscript for H: 3, subscript for O: 2