Your cell phone should be away during all times today.
Learning Intentions
You can determine how many atoms of each type of atom are in a formula
You can determine the atomic weight/mass of each type of atom in the formulas and add up all the weights/masses to get formula mass for the substance.
You can explain what percent composition is and how to calculate it.
Content Standards being covered:
*Student understands what the letters and numbers stand for in
a compound formula, can use those letter and numbers to determine how many of
each type of element there are in a formula.
101. A compound’s formula will describe which elements are present in the
compound and how many atoms of each.
102. In a compound, the subscript after an element will describe the number of
atoms of that element only
103. If a subscript is placed on the outside of a parentheses that contains more
than one element, the subscript will apply to all of the atoms within the
parentheses
104. A coefficient placed in front of a compound describes the total number of
that entire compound present
107. The total mass of a compound is the sum of all of the atom’s masses that
make up the compound
Habits of Mind/Life skills being covered:
Thinking and Communicating with Clarity
Making Connections with Past Knowledge
Journal Entry:
What elements are in Ca(OH)2? How many of each?