Question

Calculati masa moleculara a alaninei si valinei si determinati procentul de carbon

Answer 1

alanina : H2N-CH(CH3)-COOH  C3H7NO2    M = 89g/mol
 %C = 36·100/89 = 40,45%
valina :    (CH3)2CH-CH(NH2)-COOH    C5H11NO2   M = 117g/mol
%C = 60·100/117 = 51282%