Explanation:
A double replacement or double decomposition or metathesis reaction is a reaction which involves the actual exchange of partners to form new compounds.
AB + CD → AD + CB
Examples are neutralization reactions, precipitation reactions e.t.c
Characteristics and identification:
- Formation of insoluble compounds called precipitates.
- Formation of water or any other non-ionizing compound
- liberation of a gaseous product.
Type of compounds in the reactants and products:
The reactants involved are always ionic compounds that are joined by electrovalent bonds. These compounds will produce ions in solutions.
The products are usually;
- Insoluble precipitate
- Gases
- Water
Learn more:
Precipitation brainly.com/question/1870098
Neutralization brainly.com/question/6447527
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Answer:
The stoichiometric coefficient for aluminum is 2
Explanation:
Step 1: Data given
Aluminum metal = Al(s)
aqueous iron(III) oxide = Fe2O3(s)
aqueous aluminum oxide = Al2O3(s)
iron metal = Fe(s)
Step 2: The unbalanced equation
Al(s) + Fe2O3(s) → Al2O3(s) + Fe(s)
Step 3: Balancing the equation
On the left side we have 1x Al , on the right we have 2x Al (in Al2O3). To balance the amount of Al on both sides, we have to multiply Al (on the left side) by 2.
2Al(s) + Fe2O3(s) → Al2O3(s) + Fe(s)
On the left side we have 2x Fe (in Fe2O3) , on the right we have 1x Fe. To balance the amount of Fe on both sides, we have to multiply Fe (on the right side) by 2. Now the equation is balanced.
2Al(s) + Fe2O3(s) → Al2O3(s) +2Fe(s)
The stoichiometric coefficient for aluminum is 2
The mass of one Au atom is 196.97 amu from periodic table and the mass of Avogadro's number of Au atoms is 196.97 g due to this is the mass of one mole of gold
Answer: colliding tectonic plates
Explanation:
Answer:
Answer D. Picture II shows a chemical change, because the same substance changes form
Explanation:
This is the temperature that water molecules slow down enough to stick to each other and form a solid crystal