Interpreta correctamente enunciados y plantea correctamente ecuaciones balanceadas, usando la notación y simbología adecuada. -El sulfuro de hidrógeno reacciona con hierro para formar sulfuro de hierro (II) e hidrógeno gaseoso.

-El cobre se sumerge en una solución de nitrato de plata hasta producir nitrato de cobre acuoso y un precipitado de plata.

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.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl