Question

va roggg macar 3 sau 2 va implorr​

Answer 1

Răspuns:

Explicație:

1.

0,06 kg= 50 g K

n= 50g : 39g/moli=1,28 moli K

1molK-------6,022.10²³atomi K

1,28 moli-------------x

x= 1,28 . 6,022.10²³=7,70816 .10²³atomi K

 2.

1mol Na----------6,022.10²³atomi Na

2,02 moli----------------y

y= 2,02 .6,022.10²³=12,16444 .10²³atomi K

3.

0,075kg= 75g Be

n= 75g : 9g/moli=8,33 moli Be