Gunos 3. Identifica los tipos de iones y completa la información de la tabla 2.13.
no (0)
Ión
Tabla 2.13 Datos de algunas especies químicas
Número de
¿Tiene mayor o menor
electrones
número de protones que
de electrones?
epres
Tipo de ión
(anión o cation)
Al3+
13
10
ce en cada
eria
oxígeno?
19
18
9
10
Mg?
éculas y no
Lewis son
Vio
20
1
18
I
moléculas
4. Propón la representación de Lewis para las siguientes fórmulas:
CÓ, NH, NO, N, Si.
A partir de las fórmulas anteriores responde.
a) ¿Cuáles representan un átomo?
b) ¿Cuáles representan una molécula?
c) ¿Cuáles se asocian a un elemento?
d) ¿Cuáles son iones? ¿De qué tipo son?​

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

the answer is c. nacl