
PRACTICA CALIFICADA N°1-ESTEQUIOMETRIA
Authored by FERNANDO ABRAMONTE
Chemistry
2nd Grade
Used 3+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
¿Cuántos at-g contiene una muestra de 216 g de aluminio? P.A.(Al = 27)
5
6
7
8
9
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Determine el número de átomos gramo en 884 g de cromo. P.A.(Cr = 52)
19
16
18
17
15
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
En 8 g de calcio. ¿Cuántos átomos de calcio existen? P.A.(Ca = 40)
1,2046 x 1022
12,046 x 1023
12,046 x 10-22
1,2046 x 10-23
1,2046 x 1023
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
El peso molecular del yeso CaSO4 . 2 H2O es : P.A.(Ca = 40, S = 32, O = 16, H = 1)
127
172
271
177
162
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
1. El peso molecular del Acido Nitrico HNO3 :
36
43
73
83
N.A.
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Determine peso molecular del Fe2(SO4)3
PA.: (Fe =56, S = 32, O = 16).
50
100
200
500
N.A.
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Hallar el peso atómico de un elemento químico que presenta a isótopos cuyos números de masa son 50 y 52 con abundancias del 30% y 70% respectivamente.
51,4
41,5
52,8
54,1
N.A.
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