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mina [271]
3 years ago
11

Si el número atómico del Flúor es 9 y su masa atómica 19, ¿cuántos electrones, protones y neutrones, tiene? Justifique con formu

las a) 8, 8 y 9 b) 9, 9 y 19 c) 19, 9 y 10 d) 9, 10 y 9 e) 9, 9 y 10 POR FAVOR AYUDENMEN ES PARA AHORITA
Chemistry
1 answer:
ValentinkaMS [17]3 years ago
5 0

La respuesta correcta es  e) 9, 9 y 10

Explicación:

En general, la composición de los átomos incluye electrones (carga negativa), protones (carga positiva) y neutrones (carga neutra). Además, la masa atómica se refiere al número en conjunto de neutrones y protones, mientras que el número atómico define el número de protones. Es decir que masa atómica = número de protones o número atómico más de número de electrones. Además, en un átomo de carga neutra el número de electrones y protones es neutra.

De acuerdo a esto, número de protones o número atómico + número de neutrones = masa atómica

9 (número de protones) + número de neutrones = 19 (masa atómica)

número de neutrones = 19 (masa atómica) - 9 (número de protones)

número de neutrones = 10

Además, el número de protones = número de electrones por lo que 9 protones significa que hay 9 electrones

Es decir, que el número de electrones es 9, el número protones es 9, y el número de neutrones es 10

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The equation is as follow,

<span>                                  HBr </span>₍aq₎  +  H₂O ₍l₎    →

Solution:
             HBr being strong acid with Ka value of 1.0 × 10⁹. When HBr is added to water, water acts as a base and HBr acts as a acid. Water picks the proton (H⁺) from HBr and converts into Conjugate acid (H₃O⁺) ahile HBr is converted into Conjugate Base (Br⁻) after loosing proton. The equation for this reaction is as follow,

                      HBr ₍aq₎  +  H₂O ₍l₎    →    H₃O⁺ ₍aq₎  +  Br⁻ ₍aq₎
8 0
3 years ago
Can someone help me plz!!!<br><br> Calculate the mass, in grams, of 2 moles of CaCl2.
Luden [163]

Answer:

222.2 grams of CaCl2 in 2 moles

Explanation:

Mole=given mass/gram mass formula

2moles=x/Gram Mass Formula

(Gram Mass Formula of CaCl2):

Ca=40.1

Cl= 35.5 x 2= 71

-----------------------

GFM=111.1

2 moles = x/111.1 g

x=222.2

7 0
3 years ago
Read 2 more answers
Which of the following gases is expected to be most soluble in water? Explain your reasoning. (a) CH4 (b) CCl4 (c) CHCl3
sladkih [1.3K]

Answer: (c) CHCl3

Explanation:

From the rule : a polar solvent will dissolve a polar compound and a non polar solvent will also dissolves a non polar compound.

(a) CH4 is non- polar and water is a polar solvent. Therefore CH4 is not soluble in water

(b) CCl4 is non polar and water is a polar solvent. Therefore CCl4 is not soluble in wtaer

(c) CHCl3 is polar molecule and water is also a polar solvent.

Therefore CHCl3 is expected to be most soluble in water

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4 years ago
Describe the role of oceans in the water cycle?
Ainat [17]

Answer: The ocean plays a key role in this vital cycle of water. The ocean holds 97% of the total water on the planet; 78% of global precipitation occurs over the ocean, and it is the source of 86% of global evaporation. ... Water evaporates from the surface of the ocean, mostly in warm, cloud-free subtropical seas.

Explanation:

Hope this helps!

4 0
3 years ago
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A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. The concentration o
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Answer:

The concentration the student should write down in her lab is 2.2 mol/L

Explanation:

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Mass of Na2S2O3 taken = (19.440 - 2.2) g = 17.240 g.

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Volume of the solution = 50.29 mL = (50.29 mL)*(1 L)/(1000 mL)

= 0.05029 L.

To find the molar concentration of the sodium thiosulfate solution prepared we use the formula:

= (moles of sodium thiosulfate)/(volume of solution in L)

= (0.1090 mole)/(0.05029 L)

= 2.1674 mol/L

6 0
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