4. explain why 50 g of liquid water at 0°c heats-up more quickly than 50 g of an ice water mixture at 0°c under the same conditions.
5. how much energy (in kilocalories, kcal) is needed to melt 33.8 g of ice at 0.0°c?
6. how much energy (in kilocalories, kcal) is needed to warm 33.8 g of liquid water from 0.0°c to 37.0°c?

with all 3 numbers 4,5,6

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

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.