Question

cual es el peso de 7 litros de gas amoniaco NH3 en condiciones normales de presion y temperatura​

Answer 1

Cuál es el peso de 7 litros de gas amoniaco NH3 en condiciones normales de presion y temperatura​?

Mm NH3 = 17 g/mol

1. calcular moles

    1 mol ----- 22.4 L

        x    -----     7 L

         X = 0.312 mol de NH3

2. calcular gramos de NH3

n = masa / Mm

masa = 0.312 mol x 17 g/mol

masa = 5.304 g de NH3

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Aplicar la ley de los gases ideales

V x P = n  x  R  x   t

V = 7 L

P =  1 atm

R = 0.0821 (L atm /molK)

T = 273 K

n = ?

1.  calcular n = ?

n = (7 L x 1 atm) / ( 0.0821 (L atm /molK) x 273 K)

n = 0.312 moles

2.  calcular gramos de NH3

n = masa / Mm

masa = 0.312 mol x 17 g/mol

masa = 5.304 g de NH3