Counting Atoms
How many Hydrogen (H) atoms are in this compound?
C8H18
18 Hydrogen atoms
Is this equation balanced?
CaCl2 -> Ca + Cl2
Yes
1 Calcium (Ca) and 2 Chlorine (Cl) atoms on each side of the equation
True or False?
Exothermic reactions increase the temperature of their surroundings.
True
What type of reaction is this an example of?
CuCl2 + H2S -> CuS + HCl
Double Replacement
What do the Weavers love most about working at Franklin HS?
You guys! Our students :)
How many Carbon (C) atoms are in this compound?
5 CO2
5 Carbon atoms
Is this equation balanced?
N2 + 3H2 -> 2NH3
Yes!
2 Nitrogen (N) and 6 Hydrogen (H) atoms on each side of the equation
True or False?
An endothermic reaction gives off heat.
False. An endothermic reaction absorbs heat.
What type of reaction is this an example of?
K + MgBr2 -> KBr + Mg
Single Replacement
College football is usually played on Saturdays. Who are the Weavers rooting for?
Penn State (or anyone going against Ohio State)
How many Magnesium (Mg) atoms are in this compound?
4 Mg3N2
12 Magnesium atoms
Is this equation balanced?
Mg3N2 -> 2Mg + N2
No!
Reactants has 3 Mg and 2 N atoms
Products has 2 Mg and 2 N atoms
Melting ice in a glass of water is an example of which type of reaction (exothermic or endothermic)?
Endothermic (heat is being absorbed from surroundings, entering in)
What type of reaction is this an example of?
CH4 + O2 -> CO2 + H2O
Combustion
The Weavers have three cats in our family, what are ALL of their names?
Sybil, Phoebe, and Carmen
How many Barium (Ba) atoms are in this compound?
3 Ba3(PO4)2
9 Barium atoms
Is this equation balanced?
3 CaCl2 -> 3Ca + 6 Cl2
No!
Reactants has 3 Ca and 6 Cl atoms
Products has 3 Ca and 12 Cl atoms
A graph that shows that the Reactants have less energy than the Products is a model of which type of reaction (endothermic or exothermic)?
Endothermic
An upward slant means energy was absorbed / entered
What type of reaction is this an example of?
CaCl2 -> Ca + Cl2
Decomposition
Which Mrs. Weaver prefers to cook? Which one prefers to bake?
Kate prefers to bake, Ashley prefers to cook
How many Oxygen (O) atoms are in this compound?
2 Ba3(PO4)2
16 Oxygen atoms
Is this equation balanced?
CH4 + 3O2 -> CO2 + 4H2O
No!
Reactants has 1 C, 4 H, and 6 O
Products has 1 C, 8 H, and 6 O
A graph that shows that the Reactants have more energy than the Products is a model of which type of reaction (endothermic or exothermic)?
Exothermic
Slant down means energy has exited / been released
What type of reaction is this an example of?
Mg3N2 -> Mg + N2
Decomposition
What are the Weavers' first names?
Kate & Ashley
(our wedding hashtag was #marrykateandashley)