Question

Which of the following chemical equations is correctly balanced?
Select one:
a. Na3PO4 + 3AgNO3 NaNO3 + Ag3PO4
b. CH4 + 2O2 CO2 + 2H2O
c. 2Al + 6HCl 2AlCl3 + 2H2
d. 2AgNO3 + Cu 2Cu(NO3)2 + 2 Ag

Answer 1

The equation is balanced if the same amount of "elements" are on both sides.
For example, in choice C, you see there are 2 Aluminum either atoms or moles, whichever way you wanna look at it, on the left side. And there are 2 Al atoms or moles on the right side. The Al is balanced in that choice, but maybe not the entire thing.

Answer 2

So, based on that information, choice b is correctly balanced. Do you see why?

Answer 3

b. CH4 + 2O2 CO2 + 2H2O

Answer 4

Yes thank you