Chemistry, 09.04.2020 05:06, ShawnSaviro4918
Luis dice a Eduardo que cuando la leña se quema, solo quedan las cenizas y que, por tanto, no hay conservación de la masa. ¿que le contestaría Eduardo, que es un experto en reacciones químicas?
a)Que se tendría que tener en cuenta la masa de oxigeno que ha reaccionado y la de dióxido de carbono y vapor de agua que se ha formado, para poder comprobar que la masa se conserva.
b) que en las reacciones quimicas la masa se conserva, pero en las combustiones siempre disminuye.
Answers: 2
Chemistry, 22.06.2019 12:30, murtaghliam1
Word equation for k(s) +h2o(l) yield koh (aq) + h2
Answers: 3
Chemistry, 22.06.2019 17:00, emma3216
In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added
Answers: 1
Chemistry, 23.06.2019 09:00, sammypaige08
A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.
Answers: 2
Luis dice a Eduardo que cuando la leña se quema, solo quedan las cenizas y que, por tanto, no hay co...
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