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gayaneshka [121]
3 years ago
7

Refer to the following elements to answer the questions below. 126C168O11H147N3216S3115P, where the upper index is atomic mass a

nd the lower index is atomic number. How many electrons will a single atom of sulfur with no charge and no bonds have in its valence shell?
Chemistry
1 answer:
hjlf3 years ago
3 0

<u>Answer:</u> The number of valence electrons in sulfur atom are 6.

<u>Explanation:</u>

The isotopic representation of sulfur atom is _{16}^{32}\textrm{S}

Valence electrons are defined as the electrons that are present in the outer most orbital of an atom. Electrons present in the orbitals having highest principle quantum number are termed as valence electrons.

Sulfur is the 16th element of the periodic table having 16 electrons.

Electronic configuration of sulfur atom is 1s^22s^22p^63s^23p^4

The number of valence electrons present in sulfur atom are 2 + 4 = 6

Hence, the number of valence electrons in sulfur atom are 6.

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Write a chemical equation showing how this is an acid according to the Arrhenius definition. Express your answer as a balanced c
mylen [45]

Answer:

HC_2H_3O_2_{(aq)}\rightarrow H^+_{(aq)}+C_2H_3O_2^-_{(aq)}

Explanation:

Arrhenius theory:-

The Arrhenius theory was introduced introduced by Swedish scientist named Svante Arrhenius in 1887.

According to the theory, acids are the substances which dissociate in the aqueous medium to produce electrically charged atoms ( may be molecule). Out of these species furnished, one must be a proton or the hydrogen ion, H^+.

So,

The expression for acid, HC_2H_3O_2 is:-

HC_2H_3O_2_{(aq)}\rightarrow H^+_{(aq)}+C_2H_3O_2^-_{(aq)}

6 0
4 years ago
Q3. Why do you think there were so many heated debates about cell theory? Click or tap here to enter text.​
Korolek [52]
Why were there so many heated debates around the development of the cell theory? There were no concrete information about the development of the cell, thus they did not have the evidence to come to conclusions. People would argue about what theory was correct. who named the cell?
8 0
3 years ago
How many grams of HCL are needed to make 500.0 mL of a 0.100 M solution?
Brums [2.3K]

Answer:

1.44 g

Explanation:

The problem gives you the molarity and volume of the target solution, so right from the start you know that you can use that information to determine the number of moles of hydrochloric acid that it must contain.

So, molarity measures a solution's concentration in terms of how many moles of solute, which in your case is hydrochloric acid, you get per liter of solution.

A

0.158 M

hydrochloric acid solution contains

0.158

moles of hydrochloric acid for very liter of solution. Since you're dealing with

250 mL

, the equivalent of

1

4

th

of a liter, your solution will contain

250

mL

⋅

1

L

10

3

mL

⋅

0.158 moles HCl

1

L

=

0.0395 moles HCl

Now that you know how many moles of hydrochloric acid are needed to prepare your solution, use the compound's molar mass to convert this to grams

0.0395

moles HCl

⋅

36.46 g

1

mole HCl

=

∣

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

1.44 g

a

a

∣

∣

−−−−−−−−−−

Explanation:

Please  brainliest.

4 0
3 years ago
which of the following describes how ice could have once covered warm places such as australia and india
4vir4ik [10]

Answer:

U shaped vallies?

Explanation:

(i dont know if this was one of the options)

6 0
3 years ago
Which of the following lists objects in order from smallest to largest?
lyudmila [28]

Answer:

C. Moon, Earth, Jupiter, Sun

Explanation:

Well, the moon is smaller than the Earth so, C is the only logical explanation

8 0
2 years ago
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