Question

video: chemical formulas
what do formulas tell you about substances?
use the formula below to complete the sentences about formulas below: 2ccl₄
a) which number identifies how many coefficients are in the formula above?
b.) the coefficient tells us how many of which element?
c ) which number identifies the subscript?
d.) the subscript tells us how many of which element?

Explanation:

Step1: Identify coefficient

In the chemical formula $2CCl_4$, the coefficient is the number in front of the compound. Here, the coefficient is 2. So for part a), the number that identifies the coefficient is 2.

Step2: Understand what coefficient represents

The coefficient represents the number of molecules of the entire compound. So for part b), the coefficient 2 tells us there are 2 molecules of $CCl_4$.

Step3: Identify sub - script

The sub - script is the number written below and to the right of an element symbol. In $CCl_4$, the sub - script is 4. So for part c), the number that identifies the sub - script is 4.

Step4: Understand what sub - script represents

The sub - script 4 in $CCl_4$ tells us that there are 4 chlorine (Cl) atoms in each molecule of $CCl_4$. So for part d), the sub - script tells us the number of chlorine (Cl) elements.

Answer:

a. 2
b. Molecules of $CCl_4$
c. 4
d. Chlorine (Cl)