Chemistry The Law of Conservation of Mass (slide 4)

Question 1

Chemical equations have the following characteristics:
The arrow means

Answer 1

Reactants(state symbols)🡪 Products(state symbols)
“yields”, “forms”, “produces”

Question 2

State symbols represent the state in which the substance is in

Answer 2

solid, liquid, gas, aqueous

Question 3

Word and Chemical Equations

Word equations take word problems and represent the equation in words

Example:

sodium + chlorine gas 🡪 sodium chloride

Turn that into chemical formula

Answer 3

Chemical equations take word problems and represent the equation using chemical
formulas

Example:

Na(s) + Cl2(g) 🡪 NaCl(s)

Question 4

Conservation of Mass

Answer 4

In a reaction, mass (and energy) cannot be created nor destroyed

Question 5

The total mass of the reactants is ALWAYS

Answer 5

equal to the total mass of the products

Question 6

mass of reactants =

number of atoms of reactants =

Answer 6

mass of products
number atoms of products