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DerKrebs [107]
3 years ago
7

What actions show conserving by reusing? Choose the two correct answers

Chemistry
1 answer:
hram777 [196]3 years ago
3 0
A and D

Hope this helps
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¿A qué grupo pertenecen los átomos de Z = 8, Z= 36 y Z=39? ¿Cuántas capas de electrones tiene cada uno? ¿Cuántos electrones harí
zaharov [31]

Answer:

Mira la explicación.

Explanation:

¡Hola!

En este caso, podemos encontrar facilmente el grupo al que pertenecen dichos elementos con números atómicos 8, 36 y 39 respectivamente mediante su búsqueda en la tabla periódica. Así, z=8 corresponde a oxígeno, z=36 a kriptón y z=39 a itrio.

Por otro lado, para saber el número de capas, debemos desarrollar la configuración electrónica para cada uno:

O: 1s^2,2s^2,2p^4\\Kr: 1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^{10},4p^6\\Y:1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^{10},4p^6,5s^2,4d^1

Con esto, vemos que oxígeno tiene dos capas, kripton cuatro capas e iritrio cinco, a lo que a oxígeno le faltan dos electrones para llenar dicha capa, a kripton ninguno y a iritrio nueve.

Saludos.

3 0
3 years ago
Octane has a density of .692 g/mL at 20 degrees C. How many grams of O2 are required to burn 19.0 gal of C8H18?
madreJ [45]
3.64 hope that helps you 
8 0
3 years ago
Because they have aromas, compounds with a ring of resonance bonds are called –
Aleksandr [31]

Answer:

C I'm pretty sure

Explanation:

uhhhhhhhhh yes

6 0
3 years ago
What is the molarity of a 4.447 L solution
igomit [66]

Answer:52M

Explanation:

use S= 1000w/ MV

Here, s= molarity

w= the amount of NaCl

M= the atomic mass of NaCl

V= the volume of solution

4 0
3 years ago
Warm air rises because of its
slega [8]

Hotter less dense then colder air as a result cold air sinks and hot air rises

4 0
3 years ago
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