The cake will not taste right (it will be too sweet) and the batter will be the wrong consistency. It will either be too liquidy (fine sugar) or too coarse and thick (coarse grain sugar or lump sugar).
You will get really fat and sick... yuck!
you put about 1/2 of cake batter
If you are using a 2" deep cake pan you would need 13.5 cups of batter.
As much as you want except if your pregnant
The mixture would get stuck together and get hard glops.
10 Pieces .
1/2 full
6 cups for one layer
It depends on how deep the cake pan is.
A 16x16x2 cake pan has a volume of 512 cubic inches (16 x 16 x 2). Cake batter typically weighs about 0.5 to 0.6 ounces per cubic inch, so the pan can hold approximately 256 to 307 ounces of cake batter. This translates to around 16 to 19 pounds of batter, depending on the specific density of the cake recipe used.
5 because the cake swells when it bakes so 5 is enough
For a 12x12x3-inch cake pan, you'll need approximately 9 to 10 cups of cake batter. This is based on the volume of the pan, which is about 432 cubic inches. Depending on the recipe and the density of the batter, adjusting slightly may be necessary, but this amount should fill the pan adequately without overflowing.