Question

Va rog repedeeeee+coroana​

Answer 1

Răspuns:

Explicație:

a.      NaOH

M= 23 +16 =1=40-----> 40g/moli

40 g NaOH---------23g Na----------16g O ---------1g H

100 g-------------------x---------------------y-----------------z

x= 100 . 23  : 40=57,5%Na

y=100 . 16 : 40=40% O

z= 100 . 1 : 40=2,5% H

b.  Ca(OH)2

M= 40 + 2.16 +2=74------> 74g/moli

74g---------40 g Ca -------32g O---------2g H

100------------x---------------------y--------------z

x= 100 .40 : 74=54,05%Ca

y= 100 . 32  : 74=43,24% O

z= 100 .2 : 74=2,71% H

c.     NH3

M= 14 +3=17-----> 17g/moli

17g NH3---------14g N---------3gH

100g --------------x------------------y

x= 100 . 14 : 17=82,35% N

y= 100 . 3 : 17=17,65% H

d. NH4OH

M=14 + 5 + 16=35-------> 35g/moli

35g NH4OH-------14gN---------5gH---------16gO

100g----------------------x-------------y--------------z

x= 100 . 14 : 35=40% N

y= 100 . 5 : 35=14,29% H

z= 100 . 16 : 35=45,71% O