An LED lightbulb has an energy efficiency of 89%. This means that 11% of the electrical energy that goes into an incandescent lightbulb is used to produce light energy. Which statement best explains what happens to the other 11% of the electrical energy that goes into the lightbulb?

The leftover electrical energy is destroyed

The leftover electrical energy is transferred into heat energy

The leftover electrical energy is transferred into chemical energy

The leftover electrical energy is transferred into potential energy

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.