Topic
Q:
4 Multiple Choice 1 point
Which particle in Earth's atmosphere would you expect to have the fastest speed?
\( \mathrm{N}_{2} \)
\( \mathrm{O}_{2} \)
\( \mathrm{CO}_{2} \)
Ar
Q:
For each of the following situations, name without explanation the process unit (piece of
equipment) that can be used:
1.1 Oxygen is contacted with zinc to obtain zinc oxide;
1.2 An aqueous sugar solution containing \( 10 \mathrm{wt} \% \) of sugar is processed to obtain \( 50 \mathrm{wt} \% \) of
the same solution;
\( \left[2^{1 / 2}\right] \)
1.3 An aqueous salt solution containing \( 40 \mathrm{wt} \% \) of salt is processed to obtain solid salt
particles and salt solution;
Q:
1.1 Oxygen is contacted with zinc to obtain zinc oxide;
1.2 An aqueous sugar solution containing \( 10 \mathrm{wt} \% \) of sugar is processed to obtain 50 wt
Q:
3.- ¿Que científico propuso el modelo atómico
representado en la siguiente imagen?
A. Dalton.
B. Thomson.
C. Chadwick.
D. Rutherford :
Q:
QUESTION 3
3.1 Give an example for each of the following:
3.1.1. mixture which is not a solution,
3.1.2. a fluid,
3.1.3 a semi-batch process,
3.1.4 a continuous process,
3.1.5. a solution.
Q:
Si el aluminio tiene una masa de \( 27 \mathrm{~g} / \mathrm{mol} \) y el
oxigeno de \( 16 \mathrm{~g} / \mathrm{mol} \) ¿cuál es la masa molar
del \( \left(\mathrm{Al}_{2} \mathrm{O}_{3}\right)_{2} \)
Q:
La configuración electrónica indica la manera en
que se distribuyen los \( e^{-} \)entre los distintos
orbítales atómicos, sigulendo el principio de
AUFBAU o de construcción, el cual establece que
Q:
State the colour change when excess aqueous sodium hydroxide is added to a solution of
methyl orange in acid.
Q:
a) \( 4,5 \mathrm{~L} \) de mezcla con 150 ml de stevia líquida. ( \( \mathrm{R}: 3,33 \% \mathrm{v} / \mathrm{v} \) )
b) 50 ml de agua y 30 ml de perfume (considerar volumenes aditivos). ( \( \mathrm{R}: 37,5 \% \mathrm{v} / \mathrm{V} \) )
c) 76 ml de disolución formados con 13 ml de alcohol y agua. (R: \( 17,10 \% \mathrm{v} / \mathrm{v} \) )
Q:
8. Explain why each of the following pairs is
not likely to form an ionic bond.
a. chlorine and bromine
b. potassium and helium
c. sodium and lithium
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