Coal gasification can be represented by the equation: 2 C(s) + 2 H2O(g) ĻCH4(g) + CO2(g) ǼH = ? Use the following information to find ǼH for the reaction above. CO(g) + H2(g) ĻC(s) + H2O(g) ǼH = -131 kJ CO (g) + H2O(g) ĻCO2(g) + H2(g) ǼH = -41 kJ CO(g) + 3 H2(g) ĻCH4(g) + H2O(g) ǼH = -206 kJ

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.

c. is the answer

by love gaming