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Setler79 [48]
3 years ago
13

With 11 electrons how many electron shells does sodium have?

Chemistry
1 answer:
Marysya12 [62]3 years ago
4 0

Answer:

3 Shells

Explanation:

2 electrons in shell one, 8 in shell two and only 1 in shell three.

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7 on the pH scale represents what?
Nitella [24]

Answer:

seven on the ph scale is the neutral point

Explanation:

The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

3 0
2 years ago
Neutrons are found in the nucleus and separate the other particles so that the strong force can hold the nucleus together. Which
fiasKO [112]
The answer is protons(it always has a positive charge)hope that helps. :)
3 0
4 years ago
Read 2 more answers
A chemist prepares a solution of silver(I) nitrate AgNO3 by measuring out ×4.7102μmol of silver(I) nitrate into a 450.mL volumet
Veseljchak [2.6K]

The concentration in /mmolL of the chemist's silver(I) nitrate solution is 0.01047 mmoles/litre.

Explanation:

Data given:

Number of moles of AgNO3 in micro mole 4.7102micromol.

The concentration is supposed to be in mmol so the micromole will be converted to milimole.

So, 1 micromole = 0.001 millimole

hence, 4.712micromole will be 0.004712 millimole.

Volume is given as 450ml which is converted into L

to convert ml into L it is divided by 1000

so 0.45 L is the volume.

Molarity or concerntration is calculated by the formula,

molarity = \frac{number of moles}{volume in litres}  

putting the values in the formula:

molarity = \frac{0.0047103}{0.45}

              = 0.01047 mmoles/litre is the molarity of AgNO3 solution in 450 ml of solution.

3 0
4 years ago
H2s + h2o h3o+ + hs- identify the bronsted-lowry base(s) in the above equation. (select all that apply.)
gregori [183]
  The  Bronsted  base in  H2S  +H2O  →  H3O^+  + HS^-  is  H2O

     Explanation
According to  Bronsted  Lowry     definition  of an  base , that is  a  base  is  a compound that   act as a protons  acceptor.   These  protons  are in form of  hydrogen     ions .    H2O  in  the above  equation   accept  one hydrogen   ions  to  form   H3O^+
8 0
3 years ago
Initially, [NH3(g)] = [O2(g)] = 3.60 M; at equilibrium [N2O4(g)] = 0.60 M. Calculate the equilibrium concentration for NH3.
natima [27]

The question is incomplete, here is the complete question:

Consider the reaction  4NH_3(g)+7O_2(g)\rightarrow 2N_2O_4(g)+6H_2O(g)

Initially, [NH_3(g)]=[O_2(g)] = 3.60 M; at equilibrium [N_2O_4(g)]=0.60M  . Calculate  the equilibrium concentration for NH_3

<u>Answer:</u> The equilibrium concentration of ammonia is 2.8 M

<u>Explanation:</u>

We are given:

Initial concentration of [NH_3(g)] = 3.60 M

Initial concentration of [O_2(g)] = 3.60 M

For the given chemical equation:

                     4NH_3(g)+7O_2(g)\rightarrow 2N_2O_4(g)+6H_2O(g)

Initial:               3.60        3.60            

At eqllm:      3.60-4x     3.60-7x           2x             6x

We are given:

Equilibrium concentration of [N_2O_4(g)] = 0.60 M

Evaluating the value of 'x'

\Rightarrow 2x=0.60\\\\\Rightarrow x=\frac{0.60}{2}=0.2

So, equilibrium concentration of NH_3=(3.60-4x)=(3.60-(4\times 0.2))=2.8M

Hence, the equilibrium concentration of ammonia is 2.8 M

6 0
3 years ago
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