Question

Va rog ajutati-ma si nu raspundeti doar pentru puncte va rog!!​

Answer 1

Răspuns:

Explicație:

2.

n =  m : M

126 g HNO3

MHNO3= 1 + 14 +3.16=63-------> 63g/moli

n= 126g : 63g/moli = 2 moli HNO3

28g CaO

MCaO= 40 + 16=56-----> 56g/moli

n= 28g : 56g/moli = 0,5 moli CaO

3.

m = n . M

2moli H2SO4

MH2SO4= 2+32 +4.16=98-------> 98g/moli

m =  2moli . 98g/moli = 196 g H2SO4

3,5moli  Al2S3

M= 2.27 + 3.32= 150-------> 150g/moli

m= 3,5moli . 150g/moli = 525 g Al2S3

4.

3moli H3PO4

1 mol  H3PO4 ----------6,023.10²³molecule H3PO4

3 moli----------------------------------------x

x= 3  .  6,023.10²³ = 18,069 .10²³molecule H3PO4

49 g H2SO4

MH2SO4=98----> 98g/moli

n= 49g : 98g/moli= 0,5 moli H2SO4

1 mol H2SO4----------6,023.10²³ molecule H2SO4

0,5 moli--------------------------y

y= 0,5 . 6,023.10²³ = 3,0115 . 10²³ molecule H2SO4