Question

qual a massa de 5,4*10^26 moléculas de agua

Answer 1

mm (H2O) = 18 g/mol

18 g ------------- 6,02.10²³ moléculas
x g -------------- 5,4.10²⁶ moléculas

x = ( 5,4.10²⁶ ) . 18 / 6,02.10²³

x = 9,72.10²⁷ / 6,02.10²³

x = 16146.17 g