Fire is actually a chemical reaction. It's an oxidation reaction to be specific. When wood gets hot enough (the part of the wood that is burning) the large hydrocarbons break down to charred solids and a gas. The gas is what reacts with oxygen in the atmosphere to produced light, CO2 and H2O.
They fit in by atomic mass and amount of valence electrons categorized in families
Answer:

Explanation:
1. First balance the equation for the synthesis of cryolite:

2. Find the limiting reagent between the
and 
- First calculate the number of moles of each compound using its molar mass and the mass that reacted completely:



- Divide the number of moles obtained between the stoichiometric coefficient of each compound in the chemical reaction:



The
is the limiting reagent because it has the smallest number.
3. Find the mass of cryolite produced:

Answer:
Calculate the pOH for a solution with a hydroxide ion, (OH-) of concentration of 6.49 X 10-11 M.
Calculate the pH.
Note: the answers should have three significant figures
The pOH is: Blank 1
The pH is: Blank 2
Explanation: