Chapter 19 Review (PS 2013 Book)

In order for an equation to be balanced, there must be ...

• equal numbers of each type of ATOM on both sides.

• more products than reactants.

• more reactants than products.

• equal numbers of MOLECULES on both sides.

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products 

• Subscripts

• Coefficients

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products 

• Subscripts

• Coefficients

Atom or molecule?

H₂O

• Atom

• Molecule

Atom or molecule?

Cl

• Atom

• Molecule

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient

• Product

• Subscript

• Reactants

What does the part in red tell you?

H₂ + O₂ -> H₂O

• How many of that MOLECULE

• How many ATOMS of that element

• The reactants

• The products

What is the number before a molecule or atom called?

Ex: 2H₂ + O₂ --> 2H₂O

• Coefficient

• Reactant

• Subscript

• Product

What does the number in front of the molecule tell you?

Ex: 2H₂ + O₂ --> 2H₂O

• How many molecules (or single atoms) you have

• The number of atoms bonded together

• The order of the atoms

• The electronegativity

How many atoms of hydrogen (H) are in C₆H₁₂O₆?

• 3

• 6

• 12

• 24