Answer:
Explanation:
Option A is the correct answer
Physical properties include: appearance, texture, color, boiling point, melting point, ect.
Answer : The concentration of the NaOH solution is, 0.738 M
Explanation :
To calculate the concentration of base, we use the equation given by neutralization reaction:

where,
are the n-factor, molarity and volume of acid which is 
are the n-factor, molarity and volume of base which is NaOH.
We are given:

Putting values in above equation, we get:


Thus, the concentration of the NaOH solution is, 0.738 M
The clearer answer is they measure the remaining carbon, and the less that there is the older the fossil is.