Question

VĂ ROGGGGGG!!!! dau coroană
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Answer 1

Răspuns:

Explicație:

2.   c

H2O-------->16g O

Ca(OH)2----->32gO

Al2(CO3)3 -------->144g O

3.   b

MH2SO4=2 + 16 + 4.16=98--------> 98g/moli

m= n . M

m= 4moli . 98g/moli =392 g H2SO4

4.    c

1mol  NaOH----------6,023.10²³molecule

5.

MN2= 2.14=28------> 28g/moli

6.

MH2O= 2+ 16=18------> 18g/moli

18g H2O---------1molH2O

180g --------------------x

x= 180 g: 18g/moli=10 moli H2O