Consider the chemical reaction represented below. ch4 + 2o2 co2 + 2h2o + heat which of the following statements about this reaction is true? a. the reaction releases heat. b. heat is absorbed by the reaction. c. the reaction releases oxygen. d. the reaction consumes water.

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.

all eukaryotic cell have mitochondria : )