If 8.2 g of sodium ethanoate produced 560 cm3 of methane (at s. t.p.). which one of the following is the percentage yield of the reaction; A 2.5
B 4.0
C 12.0
D 25.0

Compare and contrast physical changes with chemical changes.

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it