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sergiy2304 [10]
2 years ago
8

Which of the following sets of elements could replace the generic "X" symbol with their own to produce a valid dot notation for

the element(s)?
Select one:

a.
carbon, silicon, and germanium


b.
oxygen, sulfur, and selenium


c.
boron, aluminum, and gallium


d.
nitrogen, phosphorus and arsenic
Chemistry
1 answer:
inessss [21]2 years ago
6 0

Symbol  "X" represents Nitrogen, phosphorus, and arsenic.as they have five valence electrons in their valance shell.

<h3>What is a Lewis notation?</h3>

A Lewis form is a completely simplified illustration of the valence shell electrons in a molecule. it's miles used to expose how the electrons are organized round man or woman atoms in a molecule. Electrons are proven as dots or for bonding electrons as a line between the 2 atoms.

Lewis systems, also known as electron-dot structures or electron-dot diagrams, are diagrams that show the bonding between atoms of a molecule, and the lone pairs of electrons that can exist within the molecule.A Lewis form is based totally at the idea of the octet rule, wherein atoms percentage electrons in order that every atom has 8 electrons in its outer shell. for example, an oxygen atom has six electrons in its outer shell.

Learn more about valence electrons :-brainly.com/question/371590

#SPJ1

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____KClO3 ---&gt; ____KCl+ _____O2<br><br> 2, 2, 3<br> 1, 3, 2<br> 2, 3, 3<br> 3, 2, 2
AVprozaik [17]

Answer:

2KClO3--------->2KCl + 3O2

3 0
3 years ago
A sample of nitrogen occupies a volume of 300.0 mL under a pressure of 380.0 torr at -177C. What volume would
Leya [2.2K]

Answer:

139

Explanation:

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4 0
3 years ago
When the u-235 nucleus is struck with a neutron, the ce-144 and sr-90 nuclei are produced, along with some neutrons and beta par
butalik [34]
Answer: 2 (2 neutrons are produced).

Explanation:

1) In the left side of the transmutation equationa appears:
²³⁵U + ¹n →

I am omitting the atomic number (subscript to the leff) because the question does not show them as it is focused on number of neutrons.


2) The right side of the transmutation equation has:

→ ¹⁴⁴Ce + ⁹⁰Sr + ?

3) The total mass number of the left side is 235 + 1 = 236

4) The total mass number of Ce and Sr on the right side is 144 + 90 = 234

5) Then, you are lacking 236 - 234 = 2 unit masses on the right side which are the 2 neutrons that are produced along with the Ce and Sr.

The complete final equation is:

²³⁵U + ¹n → ¹⁴⁴Ce + ⁹⁰Sr + 2 ¹n

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6 0
3 years ago
How many milliliters of 0.100 M NaOH are required to neutralize the following solutions?
gulaghasi [49]

Answers:

  • a.) 10.0 mL of 0.0500 M HCl: 5.00 ml
  • b.) 25.0 mL of 0.126 M HNO₃: 31.5 ml
  • c.) 50.0 mL of 0.215 M H₂SO4: 215. ml

Explanation:

All the reactions are the neutralization of strong acids with the same strong base.

At the neutralization point you have:

  • number of equivalents of the base = number of equivalent of the acid

And the number of equivalents (#EQ) may be calculated using the normality (N) concentration and the volume (V)

  • # EQ = N × V

Then, at the neutralization point:

  • # EQ acid = N acid × V acid

  • # EQ base = N base × V base

  • # EQ acid = # EQ base

  • N acid × V acid = N base × V base

Also, you can use the formula that relates normality with molarity

  • N = M × number of hydrogen or hydroxide ions

<u>a.) 10.0 mL of 0.0500 M HCl</u>

  • The number of hydrogen ions for HCl is 1 and the number of hydroxide ions for NaOH is 1.

  • 10.0 ml × 0.0500 M × 1 = V base × 0.100 M × 1

         ⇒ V base = 10.0 ml ×0.0500 M / 0.100 M = 5.00 ml

<u>b.) 25.0 mL of 0.126 M HNO₃</u>

  • The number of hydrogen ions for HNO₃ is 1 and the number of hydroxide ions for NaOH  is 1.

  • 25.0 ml × 0.126 M × 1 = V base × 0.100 M × 1

         ⇒ V base = 25.0 ml ×0.126 M / 0.100 M = 31.5 ml

<u>c.) 50.0 mL of 0.215 M H₂SO4</u>

  • The number of hydrogen ions for H₂SO4 is 2 and the number of hydroxide ions for NaOH  is 1.

  • 50.0 ml × 0.215 M × 2 = V base × 0.100 M × 1

         ⇒ V base = 50.0 ml ×0.215 M × 2 / 0.100 M = 215. ml

7 0
3 years ago
Einstein's formula tells us the amount of energy to which a given mass would be equivalent, if it were all suddenly turned into
skad [1K]
Einstein's famous equation, E = mc^2 relates the mass (m) of an object to energy (E). The speed of light (c), is the constant of proportionality. Einstein formulated the equation within his theory of special relativity. Indeed, a physical interpretation of this equation is that any given mass is equivalent to the energy given by the equation, if it were suddenly converted to energy. Therefore the answer to the question is true. 
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4 years ago
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