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dem82 [27]
4 years ago
15

How many electrons and how many protons Al3+

Chemistry
1 answer:
NemiM [27]4 years ago
8 0
Al+3is the third electron ionization level of the atom Al. Al has an atomic number of 13, thus it has 13 protons and electrons. By shooting a photon with a certain amount of energy (the energy in kj/mol) the atom will be ionized and lose the electrons. 13-3 = 10 The total amount of electrons in Al3+ is 10 <span>*The energy required to ''detach'' 3 electrons from the 3s and 3p orbital.</span>
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The p K a of hypochlorous acid is 7.530 . A 60.0 mL solution of 0.103 M sodium hypochlorite ( NaOCl ) is titrated with 0.296 M H
IrinaVladis [17]

Answer:

pH of the solution after addition of 8 ml 0,296 molar HCl = 7.94

Explanation:

In this case buffer exist between hypochlorous acid HClO is a weak acid and its conjugate base hypochlorite ion ClO⁻ which are deliver to the solution by NaOCl ( sodium hypochlorite ).

The salt is completely dissociate

                     [NaOCl] = [ClO⁻]

Using Henderson equation to find pH of this buffer

            pH = pKa + log\frac{[Conjugate base]}{[Acid]}

or,               = 7.53  + log\frac{60 X 0.103}{8 X 0.296}

or,               = 7.53 + 0.4

or,               = 7.94

6 0
3 years ago
What is the freezing point (in degrees Celcius) of 3.75 kg of water if it contains 189.9 g of C a B r 2?
blondinia [14]

Answer:

The freezing point of the solution is -1.4°C

Explanation:

Freezing point decreases by the addition of a solute to the original solvent, <em>freezing point depression formula is:</em>

ΔT = kf×m×i

<em>Where Kf is freezing point depression constant of the solvent (1.86°C/m), m is molality of the solution (Moles CaBr₂ -solute- / kg water -solvent) and i is Van't Hoff factor.</em>

Molality of the solution is:

-moles CaBr₂ (Molar mass:

189.9g ₓ (1mol / 199.89g) = 0.95 moles

Molality is:

0.95 moles CaBr₂ / 3.75kg water = <em>0.253m</em>

Van't hoff factor represents how many moles of solute are produced after the dissolution of 1 mole of solid solute, for CaBr₂:

CaBr₂(s) → Ca²⁺ + 2Br⁻

3 moles of ions are formed from 1 mole of solid solute, Van't Hoff factor is 3.

Replacing:

ΔT = kf×m×i

ΔT = 1.86°C/m×0.253m×3

ΔT = 1.4°C

The freezing point of water decreases in 1.4°C. As freezing point of water is 0°C,

<h3>The freezing point of the solution is -1.4°C</h3>

<em />

4 0
3 years ago
Read 2 more answers
How many total atoms are there in one molecule of C145H293O168?
nasty-shy [4]

Answer:

606 atoms

Explanation:

Add the numbers    145 + 293 + 168

4 0
3 years ago
Volume = 90g / 3g cm3 What is the volume help ASAP
Vesna [10]

Answer:

The answer will be this 30g/cm3

5 0
3 years ago
how much hydrogen gas is necessary to exert a pressure of 1.4 ATM at 430k if occupying a volume of 15.1 l
lora16 [44]

Answer:

5

Explanation:

7 0
3 years ago
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