Question

Gente, preciso calcular a massa de:
a) 5,68x10^15 átomos de mercúrio (Hg)
b) 7,92x10^-9 átomos de carbono.

Obrigado

Answer 1

a) massa atômica do Hg = 200,59 u

200,59 g ------------ 6,0.10²³ atomos
x g ------------------- 5,68.10¹⁵ atomos

x = ( 5,68.10¹⁵) . 200,59 / 6,0.10²³

x = 1,139.10¹⁸ / 6,0.10²³

x = 0.00000189 g de Hg
_________________________________________

Massa atômica do carbono C = 12 u

12 g --------------- 6,0.10²³ atomos
y g ---------------- 7,92.10⁻⁹ atomos

y = ( 7,92.10⁻⁹ ) . 12 / 6,0.10²³

y = 9,504.10⁻⁸ / 6,0.10²³

y = 1,584.10⁻³¹ g

espero ter ajudado!