Answer:
<em>The branch of natural science that deals with the composition and constitution of substances and the changes that they undergo as a consequence of alternations in the constitution of their molecules is chemistry.</em>
Explanation:
3K + AlCl3 --------> 3 KCl + Al
element compound compound element
This is single replacement (displacement) reaction.
Answer:
solute is that we disolve in solvent
solvent is in which we dissolve solute
Answer:
Option 6 ) Neutralization
Explanation:
For this case, the missing coefficient would be a "6" before the H₂O, within final products (right side of the equiation), hence, the final reaction should be:
2H₃PO₄ + 3Ba(OH)₂ ------> Ba₃(PO₄)₂ + 6H₂O
You should have in mind that the amount of atoms at each side of the chemical equation should be the same, so as to comply with the principle of mass conservation. If you add "6" on the left side of the H₂O, the equation will be balanced (for each side, lef and right, you will have: 12H, 2P, 14O and 3Ba)
Lastly, this is a chemical neutralization reaction, where an acid (H₃PO₄) is reacting with a base (Ba(OH)₂) in order to finally obtain a neutral salt (Ba₃(PO₄)₂) and water (H₂O)
