-16 9. What wavelength (~) of radiation has photons of energy (E) at 2.87 x 10^-16 J?

10. A photon of visible light has a frequency (v) of 4.3 x 10^14 s^-1. What is the energy (E) of this photon?

11. Calculate the energy(E) of a photon of radiation whose wavelength() is 322nm.
Note: (1nm=1x10-9-m)

12. What wavelength(2) of radiation has photons of energy (E) at 2.87 x 10^-16 J?

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

i'm assuming that it's c.) red bank..

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.