Question

Cati atomi si moli reprezinta 740g hidroacid de calciu

Answer 1

cred ca este vorba de hidroxidul de calciu   Ca(OH)2

M,=(40gCa+2x16,gO +2x1,gH)/MOL= 74g/mol\

1mol hidroxid...........74g

x................................740g

x=n=10mol Ca(OH)2

1mol Ca(OH)2........1molatomiCa.........2molatomiO.......2molatomiH

10mol...............x= 10molatomi Ca..y= 20molatmiO...Z= 20mol atomiH,

1mol atomi...........6,023X10²³atomi

10mol at Ca..................x= 6,023x10²⁴ at.Ca

1mol at O sau H............6,023X10²³atomi

20mol O sau H..................x=                                   calculeaza !!!!!!