In the following chemical equation what are the reactants and what are the products?

1
In the following chemical equation what are the
reactants and what are the products? CH8 3O2 ?
CO2 4H2O
2
CH8 3O2 ? CO2 4H2O
Reactants Products
3
In the chemical formula, AlCl3, what is the
number 3 and what does it tell you?
4
The three is a subscript. It tells you that
there are three chlorine (Cl) atoms in the
compound AlCl3
5
How many aluminum (Al) atoms are in the compound,
AlCl3?
6
There is not a subscript after Al in the formula
AlCl3, therefore we assume that there is only one
Al atom in the compound.
7

• What uses symbols and formulas to show a chemical
  reaction?

8

• A chemical equation.

9

• What happens to energy in during an endothermic
  reaction?
• Does a substance feel hot or cold during an
  endothermic reaction?

10

• Energy is absorbed
• A substance feels cold during an endothermic
  reaction

11

• What happens to energy in during an exothermic
  reaction?
• Does a substance feel hot or cold during an
  exothermic reaction?

12

• Energy is released
• A substance feels hot during an exothermic
  reaction

13

• How many different types of atoms are there in
  KNO3?
• What are they?

14

• There are three different types of atoms are
  there in KNO3.
• They are potassium (K), nitrogen (N), and oxygen
  (O).

15
In the formula, 4H2O, which number is the
coefficient and what does it tell you?
16
In the formula, 4H2O, the four is the
coefficient. It tell you that there are four
molecules of H2O (water).
17

• In the chemical formula, NH4Cl, how many atoms
  are there?

18

• There 6 atoms in NH4Cl.

1 4 1 6 atoms total
19

• In the chemical equation,
• 2H2O2 ? 2H2O O2, how many atoms are in the
  chemical equation?

20

• In the chemical equation,
• 2H2O2 ? 2H2O O2, there are 8 atoms total

4 4 8