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Mariulka [41]
3 years ago
12

How many valence electrons does this atom have? (Urgent plz help)

Chemistry
1 answer:
tigry1 [53]3 years ago
7 0

Answer: theres 5

Explanation: valence electrons are the electrons in the outer shell. I took that test a few weeks ago :0

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PLEASE HELP ASAP WILL GIVE BRAINLIEST
kirill115 [55]

The amount of heat required to convert H₂O to steam is :  382.62 kJ

<u>Given data :</u>

Mass of liquid water  ( m ) = 150 g

Temperature of liquid water = 43.5°C

Temperature of steam = 130°C

<h3 /><h3>Determine the amount of heat required </h3>

The amount of heat required = ∑ q1 + q2 + q3 ----- ( 1 )

where ;

q1 = heat required to change Temperature of water from 43.5°C to 100°C .  q2 = heat required to change liquid water at 100°C to steam at 100°C

q3 = heat required to change temperature of steam at 100°C to 130°C

  • For q1

M* S_{water}*ΔT

= 150 * 4.18 * ( 100 - 43.5 )

= 35425.5 J

  • For q2

moles * ΔHvap

= (150 / 18 )* 40.67 * 1000

=  338916.67 J

  • For q3

M * S_{steam} * ΔT

= 150 * 1.84 * ( 130 -100 )

= 8280 J

Back to equation ( 1 )

Amount of heat required = 35425.5  + 338916.67 + 8280 = 382622.17 J

                                                                                               ≈ 382.62 kJ

Hence we can conclude that The amount of heat required to convert H₂O to steam is :  382.62 kJ.

Learn more about Specific heat of water : brainly.com/question/16559442

6 0
3 years ago
¿cual es el volumen de solución que contiene 10 gramos de NaCl en 100 mL de solución?.
Ivenika [448]

summer college community of college students high education community high schools provide education and education high schools community education of children high jevs human services is work to community city philadelphian workers to provide high-quality

8 0
2 years ago
Need the answer ASAP ​
wolverine [178]

Answer:

d

Explanation:

8 0
3 years ago
calculate the charge on plates if the plate area is 100 cm2 , the gap between plates is 10 mm and the scale is reading 1.0 gram.
Law Incorporation [45]

Answer: The charge on the plates are 88.4 picafarad

Explanation:The equation used in measuring charge in a plate is given as:

C=Q/V =E A/D

Where E= dielectric content

A= Area of plates

d= distance between plates

Using dielectric constant for Air=8.84×10-12F/m

A=100cm2=0.01m2

d=10mm=0.001m

C= 8.84×10-12×0.01/0.001

C= 88.4 picafarad

8 0
3 years ago
Cual es el exceso de electrones respecto al numero de protones en un cuerpo cuya carga es de -21.725 e?
Olin [163]

Answer:

Sorry i cant unserstand your language ;(

Explanation:

4 0
2 years ago
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