A 5.00 g sample of spinach was extracted with oxalic acid, diluted with water and an excess of KI, starch and HCl were added. The titration required 20.6 ml and 19.8 ml of 0.073 M KIO3 to turn dark blue in duplicate titrations. How much vitamin C was in 5.00 g of spinach?

Supongamos que estás estudiando dos estrellas. ambas estrellas tienen la misma magnitud aparente, pero la estrella a tiene una magnitud absoluta mayor que la estrella b. ¿que puedes decir acerca de la distancia a la tierra de estas dos estrellas?

What are the percent by mass of copper in penny lab

Given the following information: mass of proton = 1.00728 amu mass of neutron = 1.00866 amu mass of electron = 5.486 × 10^-4 amu speed of light = 2.9979 × 10^8 m/s calculate the nuclear binding energy (absolute value) of 3li^6. which has an atomic mass of 6.015126 amu. j/mol.