What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm? a. 246 kJ
b. 6.46 x 10-25 J
c. 12.4 kJ
d. 6.46 x 10-16 J
e. 2.46 x 10-4 J

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture