4.En un laboratorio se necesita elaborar una disolución que tenga un punto de ebullición de 103 ºC. Para ello, se disponen 500 g de agua y de resorcina (C6H4(OH)2). ¿Qué cantidad de resorcina se requiere para elaborar la disolución? Considera que la Ke del agua es 0,52 ºC Kg/mol. Básate en las siguientes preguntas: a)¿Cuál es la variación de la temperatura de ebullición de la disolución y del agua? (2 ptos.)

b)¿Cómo calcularías la molalidad de la disolución a partir de la información? (3 ptos.)

c)Calcula la masa en gramos de resorcina que se debe utilizar para elaborar la solución requerida. (2 ptos.)

Lithium diisopropylamide [(ch3)2ch]2nli, referred to as lda, enjoys many uses as a strong base in synthetic organic chemistry. it is customarily prepared by the reaction of diisopropylamine [(ch3)2ch]2nh with butyllithium. draw the products of the reactions in the appropriate boxes and select the acid, base, conjugate acid, and conjugate base. be sure to answer all parts.

What’s the scientific notation for the number 6,840,000,000

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl +4h2o enter the elemental symbol. view available hint(s) is reduced