que cantidad de calor se debe aplicar a una barra de plata de 24kg para que eleve su temperatura de 20°C a 80°C​

Side chains which have pure hydrocarbon alkyl groups (alkane branches) or aromatic (benzene rings) are non-polar. Examples include valine, alanine, leucine, isoleucine, phenylalanine. The number of alkyl groups also influences the polarity. The more alkyl groups present, the more non-polar the amino acid will be.