
RECORDANDO CUARTO...............
Authored by Ariel Alvarez
Chemistry
4th - 5th Grade
Used 1+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Los números pequeños de cada átomo en una formula se llaman:
números pequeños
coeficientes
subíndices
variables
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
El at-g es:
El peso atómico expresado en libras
El peso atómico expresado en gramos
El peso atómico expresado en kilogramos
Todos los anteriores
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
El peso atómico de un elemento X es 51.7. Si este elemento consta de dos isótopos que tienen números de masa de 50 y 52. Cuál es el porcentaje de abundancia del isótopo más ligero:
5%
2%
60%
ninguno
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Hallar el Peso molecular de la metanfetamina (C10H15N)
20g/mol
120 g/mol
170 g/mol
149 g/mol
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
La lisina, un aminoácido esencial en el cuerpo humano contiene CHON. En un experimento la combustión completa de 2.175g de lisina produjo 3.94g de CO2 y 1.89g de agua. En otro experimento 1.873g de lisina produjeron 0.436g de amoniaco a) Determinar la F.E. b) Determinar la F.M. de la lisina sabiendo que el peso molecular real es 150 g/mol
C2H2O4N4
C4H5O4N5
C6H6O6N12
NINGUNO
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