The light produced by fireflies is a complex
oxidation reaction between a compound named
luciferin, produced in the body of the firefly,
and oxygen in the air. which statement about
the reaction is probably not true?
f the reaction has low activation energy.
g the reaction is exergonic.
h the reaction produces a lot of thermal
energy.
j most of the energy given off by the
reaction is in the form of light.

The answer is h the reaction produces a lot of thermal energy

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.