Balancing Chemical Equations

Front

How many Oxygens are in this molecule? (OH)₂

Back

2

Front

What are the smaller numbers that you CANNOT change in a chemical equation?

Back

Subscript

Front

What are the larger numbers that you CAN CHANGE in a chemical equation? Options: Coefficient, Products, Reactants, Subscripts

Back

Coefficient

Front

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

Back

2

Front

Pb(NO₃)₂ + KI --> PbI₂ + KNO₃
What type of reaction is this? Options: Synthesis, Decomposition, Single Replacement, Double Replacement

Back

Double Replacement

Front

Na + O₂ -----> Na₂O
Type of reaction? Balance it too.

Back

Synthesis, 4Na / 2Na₂O

Front

What type of reaction is this?
__H₂O₂ ---->  __H₂O + O₂
Options: Synthesis, Decomposition, Single Replacement, Combustion

Back

Decomposition

Front

What law governs the balancing of chemical equations? Options: Law of Energy, Law of Conservation of Matter/Mass, Law of Gravity, Law of Matter Movement

Back

Law of Conservation of Matter/Mass

Front

Balance this chemical reaction: __H₂O₂ ----> __H₂O + O₂

Back

2H₂O₂ ----> 2H₂O + O₂

Front

Why is it called the Law of Conservation of Matter/Mass?

Back

Energy is never created, nor destroyed-- it always moves