Drag each tile tile to the correct location in the equation, each tile can be used more than once, but not all tile will, be used. balance the equation with the correct coefficients

2C2H2 + 5O2 > 4CO2 + 2H2O

Explanation:

The question is incomplete, but i manage to find one question similar to this, and the remaining part is:

C2H2 + O2 > CO2 + H2O

To balance the equation, we need to use the priority order to balance, which is the following:

Metals > non metals > Oxygen > Hydrogen

According to this, we have non metals, oxygen and hydrogen in the above equation, let's balance first the carbon. We have 2 carbons in the products, and 1 in the products, then, we just put a 2 there:

C2H2 + O2 > 2CO2 + H2O

Now, the number of carbon is balanced, but the number of oxygen was altered, let's see how much do we need. We have 5 oxygens in the products, and 2 in the reactants, we can put a 2 next to the water, so the sum of the oxygens in the products will be 6, and then, a 3 in the reactants:

C2H2 + 3O2 > 2CO2 + 2H2O

Putting that, will alter the number of hydrogens, so we need to balance that putting a 2 in the reactants; however this will alter again the number of carbons, so we must change the number in the products for the carbon, changing the 2 by a 4:

2C2H2 + 3O2 > 4CO2 + 2H2O

Finally, we can change the number of oxygens in the reactants, from 3 to 5, to balance the equation:

2C2H2 + 5O2 > 4CO2 + 2H2O

And this is the final balanced equation

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72