Question

Repede
1 si 2 repedeeeeeeeeeeeeewe

Answer 1

I/.

1 mol metanol......... 224x10la3 kcal

2000 moli.................. a = 448x10la6 kcal

III/.

consideram cate 1 mol din fiecare component

etanol CH3CH2OH are masa molara = 46 g/mol

metanol CH3OH are masa molara = 32 g/mol

=> 46 + 32 = 78 g

=> 78 g .... 3x12 g C... 10x1 g H...... 2x16 g O

100% (g)..... a% C.......... b% H.......... c% O

=> a = 3600/78 = 46,15%

b = 12,82% H si c = 41,03% O

=> d)

III/.

A - b / B - a / C - a / D - b

IV/.

C6H5-CH2-NH2 = benzilamina

CH3-C6H4-NH2 = o-toluidina / m-toluidina / p-toluidina