Answer: 20.1 kg.
Explanation:
To calculate mass of a substance, we use the equation:
We are given:
Density of gasoline = 
Volume of gasoline = 
(Conversion factor: 
)
Putting values in above equation, we get:
The rule apply for multiplication and division is :
The least precise number present after the decimal point determines the number of significant figures in the answer, thus the answer musty have three significant digits.
Hence, the mass added is 20.1 kg.
Answer:
5) A chemical that cannot be broken down or separated into other chemicals
Explanation:
Element:
When number of single type of atoms meet then they form element.Element is a pure substance.Element is the basic unit to form all other substances which exits in the world. These are the element which have same number of proton in the nucleus.Element can not be broken down or can not be separated in to other .
Ex: Oxygen(O) ,Hydrogen(H) ,Helium(He) ,Copper(Cu) ,gold(Au) ,Silver(Ag),Aluminium(Al) etc .
5) A chemical that cannot be broken down or separated into other chemicals.
