Question

va rog!E urgent!2b și 3b

Answer 1

C= n/V
C= conc. molara(mol/L)
n=nr de moli
V= volumul solutiei(L)
2.b.
 V= 600 L
C=1.5 M 
=> n=V x C => n= 1.5 *600 = 900 mol H2SO4 pur
m H2SO4 = n * M => 900 mol * 98 g/mol = 88200 g = 88.2kg H2SO4 pur
M H2SO4 = 98 g/mol

3.b.
C= n/V
C= 0.1 M (mol/L)
m NaOH = 16g
n NaOH = m/M => n NaOH = 16g/40 g/mol = 0.4 mol NaOH
M= 40 g/mol
V= n/C => V sol NaOH = 0.4 mol / 0.1 mol/L = 4 L sol NaOH