The combustion of propane (C3Hg) produces CO2 and H2O: C3H8() +502(g) → 3CO2(g) + 4H20(g)
How many moles of H2O can be produced by the reaction of 3.9 mol O2 with excess C3H8?

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.

a) the particles of the chair are strongly held together.

the maximum mass of nh3 is nh3 in grams

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este