
QAB 1°
Authored by ADRIANA HERNANDEZ - CALVA
Chemistry
University
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14 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Las opciones correctas para expresar la relación soluto-disolvente en una disolución de concentración 0.3 M son:
0.3 moles de una sustancia en 1 litro de disolución
0.3 mmoles de una sustancia en 1 litro de disolución
0.3 moles de una sustancia por mililitro de disolución
0.3 mmoles de una sustancia por mL de disolución
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Las opciones para expresar la masa molecular del NaOH son:
40 g/mol
40 mg/mmol
40 mg/mol
40 g/mmol
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Para preparar 500 mL de una disolución de NaOH de concentración 1 M se requieren: (dos respuestas)
0.50 mol
500 mmol
0.50 mmol
50 mol
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Para preparar 500 mL de una disolución de NaOH de concentración 0.5 M, se debe pesar:
10 gramos
1.0 gramos
0.10 g
100 mg
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Los mililitros de ácido nítrico (HNO3) con una pureza de 75 % y una densidad de 1.4 g/mL que se necesitan para preparar 600 mL de una disolución 1.5 M son:
54 mL
5.4 mL
4.5 mL
45 mL
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
El ácido nitroso (HNO2) es un:
ácido fuerte
ácido débil
anfotero
ácido diprotico
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Teoricamente el pH para una disolución de ácido nitroso (HNO2) de concentración 0.75 M es:
Ka del (HNO2) = 7.1x10-4
1.70
0.125
12.3
13.9
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