2) En un alto horno se procesa un óxido de Hierro con Antracita (Carbono) para producir Arrabio (Hierro Fundido). Las reacciones estequiométricas son reacciones consecutivas: A) \( \mathrm{FeO}+\mathrm{CO} \longrightarrow \mathrm{CO}_{2}+\mathrm{CO} \) B) ¿Cuánto Oxido Ferroso se necesita para producir 180 kg de Hierro? b) ¿Cuánto Carbono se habrá consumido si al final del proceso se generaron 400 kg de Dióxido de Carbono?

Upon thermal decomposition of X, a black compound was expected, but a red compound was found instead, what might be the reason? (Exam 1 L2 Ch2) a) condition of (absence of air ) was not properly applied b) the temperature applied was not sufficient c) the wrong compound was thermally decomposed instead of the correct one d) both a and c are correct

b) qual é o número de valência dos elementos?

13 gás hidrogênio reage com gás cloro produzin- do ácido clorídrico. Ao reagir 10 g de hidrogênio com 500 g de cloro, houve formação do produto ácido, mas observou-se que 145 g de cloro per- maneceram sem reagir. Qual será a massa, em gramas, do ácido clorídrico formado? Justifique

An iron ore ( X ), 2 elements ( \( Y \) and Z ) from this ore are used in making 2 types of alloys, if you know that element \( Y \) is a source of reducing agent in blast furnace, which of the following is true about element ( z ) and iron ore \( (\mathrm{X} \) ) respectively? (Exam \( 1 \mathrm{L2} \mathbf{C h} 2 \) ) a) \( Z \) has highest magnetic moment in oxidation state +2 , while \( X \) is paramagnetic b) \( Z \) has highest magnetic moment in oxidation state +3 , while \( X \) is thermally decomposed in air giving a black oxide c) \( Z \) is not considered as a transition element, while \( X \) is thermally decomposed in absence of air giving a black oxide d) \( Z \) forms paramagnetic compounds in most of it's oxidation states, while \( X \) requires roasting before reduction

Question 12 (1 point) \( \begin{array}{l}\text { 4) Listen } \\ \text { Medium carbon steel has a carbon content of } 0.35 \% \text {. What is the fractional portion } \\ \text { of carbon in this steel? }\end{array} \).