Question

calculati nr de molecule din 3 , 2g H2​

Answer 1

Răspuns:

Explicație:

cerinta neclara !!!!!!!!    este 3g,  2g   sau 3,2g  ??????

am calculat toate variantele !!!!!

n= m: M

n= 3g : 2g/moli= 1,5 moli H2

1molH2-----------------6,022.10²³molecule H2

1,5 moli--------------------------x

x= 1,5  . 6,022.10 ²³= 9,033 .10²³molecule H2

n= 2g : 2g/mol i= 1mol H2

1mol--------6,022.10 ²³molecule H2

daca nr. este 3,2 g

n= 3,2g : 2g/moli= 1,6 moli H2

1mol H2---------6,022.10²³molecule H2

1,6moli-------------------x

x= 1,6 . 6,022 .10²³ =9,6352.10²³molecule H2