Question

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Answer 1

19. Mm NaCl 0 58.4 g/mol

Moles = masa/Mm

Moles = 14.3 g / 58.4 g/mol = 0.245 mol

Masa = 42.2 / 1000 0 0.0422 Kg

m = 0.245 mol / 0.0422 Kg = 5.83

20.

1L = 6 mol-g H2SO4= 1,34 Kg solucion

 

 Kg de H2SO4 = 6(98g H2SO4)(1kg H2SO4 / 1000 g H2SO4) = 0,588 Kg H2SO4.

de agua = 1,34 kg - 0,588kg= 0,752 kg H2O. 

Molalidad (m)= 6 mol-g H2SO4 / 0,752 Kg H2O=7.97 m en H2SO4.