Respostas

2014-03-12T22:50:55-03:00
6 . 10^23 moleculas -------------- 18g
x-------------------------------------------9 g         
         x= 3. 10^23                                      

Alternativa C

3 5 3
A melhor resposta!
2014-03-12T22:55:12-03:00
6.10²³--------------- 18g
x---------------------- 9g
 x= 6.10²³ . 9/ 18
x = 6.10²³ / 2
x = 3.10²³
letra c.
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