Answer:
The energy for 1 mole of these photons is E = 31 × 
Explanation:
Given data
Wavelength 
639.8 × 
m
Plank constant h = 6.626 × 
J sec
Speed of light c = 3 × 
meter per second
We know that Energy of a photon is given by
Value of ( h c ) = 6.626 × × 3 × = 19.878 × 
639.8 × m
Now Energy of a photon
E = 0.031 × 
Joule per mole
E = 31 ×
Therefore the energy for 1 mole of these photons is E = 31 ×
Because it is made up of sodium, a metal, and carbon, a nonmetal.
Hope I helped ♡
The limiting reactant can be determined by calculating the
moles supplied / moles stoich ratio and the lowest is the limiting reactant.
Fe(CO)5 ratio = [6 g / 195.9 g/mol] / 1
Fe(CO)5 ratio = 0.0306
PF3 ratio = [4 g / 87.97 g/mol] / 2
PF3 ratio = 0.0227
H2 ratio = [4 g / 2 g/mol] / 1
H2 ratio = 2
<span>We can see that PF3 has the lowest ratio, so it is the
limiting reactant.</span>
<span>A) elements and compounds.
Compounds are two combined elements.</span>
Answer:
1.38g/cm 3
Copper-More Dense than 1.38g/cm 3
