Question

calcule las moléculas en 2,5 gramos de benceno​

Answer 1

2,5 g C6H6 (benceno)

M ( C6H6) = 6 x 12 + 6 x 1 = 78 g /mol

. Calculamos las moleculas

Primero, Calculamos los moles:

$2.5 \: g \: </strong><strong>C</strong><strong>6H</strong><strong>6 \times \frac{1 \: mol \: </strong><strong>C</strong><strong>6H</strong><strong>6}{78 \: g \: </strong><strong>C6H</strong><strong>6} = 0.032 \: moles \: </strong><strong>C</strong><strong>6H</strong><strong>6$

Por último, Calculamos las moleculas

$0.032 \: moles \: </strong><strong>C</strong><strong>6H</strong><strong>6 \times \frac{6.022 \times {10}^{23}molec. }{1 \: moles \: </strong><strong>C6H</strong><strong>6} = 1.927 \times {10}^{22} \: moleculas$

Hay 1,927 x 10^22 moléculas en 2, 5 g C6H6