I think <span>3H2+N2==>2NH3</span>
Explanation:
magnesium Hydroxide + Hydrochloric react together and give us magnesium chloride + water
Answer:
A. The increase in the mass of the magnesium oxide was due to oxygen atoms in the air.
Explanation:
Burning occurs in the presence of oxygen. A chemical combination occurs between Mg and O in that the atom of magnesium attracts one another.
Mg + O₂ → MgO
Starting with the magnesium, on reacting with oxygen a new compound forms. This is why there is mass increase in the MgO compared to the starting material.
They loose a valence electron
The original sample was a compound because it was composed of two different elements and was not purely one element
