Question

am nevoie de ajutor urgent!!!

Precizati formula moleculara, calculati raportul atomic si compozitia procentuala pentru: zaharoza si pentru acidul 2-amino-propanoic (alfa -alanina)​

Answer 1

Răspuns:

C12H22O11 -zaharoza

r.a C:H:O=12:22:11

MC12H22O11=12x12+1x22+16x11=342g/mol

342gC12H22O11.............144gC...............22gH............176gO

100g C12H22O11.............x%C..................y%H.................z%O

x=100x144/342=calculeaza

y=100x22/342=calculeaza

z=100x176/342=calculeaza

C3H7NO2 - acid 2-amino-propanoic (alfa -alanina)​

r.a. C:H:N:O=3:7:1:2

MC3H7NO2=3x12+1x7+14+2x16=89g/mol

89g C3H7NO2...............36gC.............7gH............14gN............32gO

100gC3H7NO2................x%C.............y%H............z%N..................t%O

x=100x36/89=calculeaza

y=100x7/89=calculeaza

z=100x14/89=calculeaza

t=100x32/89=calculeaza

Explicație: