A ES YODO AQUELLO QUE ManTIENE MASA Y OCUPA UN LUGAR EN EL ESPACIO Bes la fuerza xon la gravedad de un planeta atrae la masa de un objeto
ces una porcion limitada de materia que ocupa un lugar en el espacio
d-_es un tipo de materia que tiene na composicion definida y constante
e es la cantidad de materia que tiene un cuerpo
aka una ashuda CUERPO/MATERIA/PESO/MASA/SUATANCIA ayud

What was the procedure by which case united states vs lopez went to court

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.