In terms of electron arrangement in the formation of the ionic compound aluminium oxide, two aluminium atoms donate their three outer electrons to three oxygen atoms. This results in two triple positive aluminium ions to three double negative oxide ions via electron transfer.

The physical state of chemicals is also very commonly stated in parentheses after the chemical symbol, especially for ionic reactions. When stating physical state, (s) denotes a solid, (l) denotes a liquid, (g) denotes a gas and (aq) denotes an aqueous solution.

The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products. A product is a substance that is present at the end of a chemical reaction.

Yes, the equation is balanced. There are the same number of Hydrogen (H) and Oxygen (O) atoms on both sides of the equation.

yes hydrogen has 4×2=8 atoms and oxygen has 2×2=4 atoms on both sides hence it is balanced.

4Al (s) + 3O2 (g) —–> 2Al2O3 (s) This is a combination reaction. Simple Combination. Chemical equations must be balanced since anything that is consumed by the reaction must form product – we can’t have atoms disappearing or appearing out of nowhere! Answer Oxygen oxidises aluminium to aluminium oxide.

This is an example of a decomposition reaction.

Almost all stoichiometric problems can be solved in just four simple steps:

1. Balance the equation.
2. Convert units of a given substance to moles.
3. Using the mole ratio, calculate the moles of substance yielded by the reaction.
4. Convert moles of wanted substance to desired units.

synthesis reaction

Aluminum also reacts with oxygen to form aluminum oxide.

Human exposure to aluminium is inevitable and, perhaps, inestimable. Aluminium’s free metal cation, Alaq(3+), is highly biologically reactive and biologically available aluminium is non-essential and essentially toxic.

Her weaknesses are when she is high up in the air and there is little oxygen in the air, it makes her dizzy.

Common uses of oxygen include production of steel, plastics and textiles, brazing, welding and cutting of steels and other metals, rocket propellant, oxygen therapy, and life support systems in aircraft, submarines, spaceflight and diving.

Oxygen is made in two ways: – Medical oxygen: is made by separating the oxygen from other gases and impurities found in air by repeated steps of compression, filtration and purification, according to Air Liquide Sante France. Such medical oxygen reaches more than 99.5 percent purity and is rigorously tested.

Antoine Lavoisier determined that oxygen was a key substance in combustion, and he gave the element its name. He developed the modern system of naming chemical substances and has been called the “father of modern chemistry” for his emphasis on careful experimentation.