Question

H2C=CH--CHO
Daca 200g crema NIVEA contine 5# glicerina, din care 30% se deshidrateaza, calculeaza masa de acroleina formata.

Answer 1

100 g acroleina.....5 g glicerina 200 g acroleina.....10 g glicerina. 5% glicerina din 200 de g acroleina inseamna 10 grame. 10 grame...100% X grame....30% => x=30*10/100=3 grame. Masa molara glicerina=36+48+8=92 g/mol. Masa molara acroleina=36+16+4=56 g/mol. La 92 de grame ..... 56 grame La 3 grame.... y=56*3/92=1.82 grame acroleina