Respostas

2013-08-25T02:10:27-03:00
190g---> 6,022 x10^23 atomos
x-------> 1 atomo
x= 3,15 x10^-24 g

190g----> 6,022x10^23 atomos
40g------> x
x= 1,26 x 10^23 atomos