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 = 18 . ( 5,4.10²⁶) / 6,02 .10²³

x = 9,72.10²⁷ / 6,02.10²³

x = 16146,17 g de água