Samuel adds a teaspoon of salt to a glass of water. he notices that the salt disappears. samuel takes a sip to discover that the water tastes salty. what kind of change has occurred? a) it’s a chemical reaction because a new substance has formed. b) it’s a physical change because the water and the salt kept their original properties. c) it’s an example of synthesis because two substances reacted to give one substance. d) it’s a chemical reaction because the water now tastes salty but originally did not

Option (b) is the correct answer.

Explanation:

When a teaspoon of salt is dissolved in water then it will completely dissociate into ions forming a homogeneous solution.

This is because particles of salt will evenly distribute into ions in the water.

This is a physical change as salt has dissociated into its ions and it has not chemically combined to the water molecules.

Hence, both salt and water will retain their chemical; properties.

Thus, we can conclude that in the given situation it’s a physical change because the water and the salt kept their original properties.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)