La quimica analitica tiene como objetivo de estudio el analisis culitativo y cuantitativo de las sustancias que contruyen loz materiales que encontramos en la naturaleza .Contempla las tacenicas de manipulacion y la fundamentacion teoricas para las separaciones , identificaciones y medidas. Las reacciones quimicas son evidencia de los cambios cualitativos y cuantitativos que se dan en los proceso de !a vida diaria y de la naturaleza. para el analisis cuantitativo de las sustancias se aplican los metodos gravimetricos y volumetricos . a) ¿En que se diferencia estos metodos de analisis?

b) ¿En que caso se aplica cadanuno de ellos?​

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

Plz ! what does it mean for an allele to be dominant?