Is burning a physical change or a chemical change? Justify your answer!

A chemical change occurs whenever matter changes into an entirely different substance with different chemical properties. Burning is an example of a chemical change.

Explanation:

Chemical Change

Explanation:

Burning of an object is an irreversible process. It cannot be turned back into its original reactant. Physical change would be something like ice melting. You could freeze the water back into ice, therefore reversible.

The volume of stock solution of acid required 6.94 mL.

Explanation:

To calculate the volume of stock solution, we use the equation given by neutralization reaction:

where,

are the molarity and volume of acid which is

are the molarity and volume of stock solution of acid.

We are given:

Putting values in above equation, we get:

Hence, the volume of stock solution of acid required 6.94 mL.