Answer: 
Explanation:
Combustion is a chemical reaction in which hydrocarbons are burnt in the presence of oxygen to give carbon dioxide and water.
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken. In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.
The balanced combustion reaction is,:

Explanation:
precipitation like snow rain with increased acid is know as acid precipitation
Answer:
corrosion resistance.
Explanation:
In summary, stainless steel does not rust because it is sufficiently reactive to protect itself from further attack by forming a passive corrosion product layer. (Other important metals such as titanium and aluminum also rely on passive film formation for their corrosion resistance.)
Answer:
2.83mole of Cl
Explanation:
Equation of reaction:
Na + Cl -----> NaCl
Since 1 mole of Na react with 1 mole of Cl from the equation. Then 2.83mole of Na will react with 2.83mole of Cl