The ester of chocolate and the test of chocolate ​

Iknow #2 is d. i just need to know why

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.