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Wewaii [24]
3 years ago
6

HIiii. Hope y'all having a great day... so... i have a question...who's your favorite..rapper...singer....etc

Chemistry
2 answers:
BabaBlast [244]3 years ago
5 0

Answer:

Louis Tomlinson, Emma Watson.

Explanation:

Thanks....you too ^_^

creativ13 [48]3 years ago
4 0

elvy the god

smiles773

nba yb

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What is the concentration of OH− and pOH in a 0.00072 M solution of Ba(OH)2 at 25 ∘C? Assume complete dissociation.
Mumz [18]

Given :

0.00072 M solution of Ba(OH)_2 at 25^oC .

To Find :

The concentration of OH^-and pOH .

Solution :

1 mole of Ba(OH)_2 gives 2 moles of OH^- ions .

So , 0.00072 M mole of Ba(OH)_2 gives :

[OH^-]=2 \times 0.00072\ M

[OH^-]=0.00144\ M

[OH^-]=1.44\times 10^{-3}\ M

Now , pOH is given by :

pOH=-log[OH^-]\\\\pOH=-log[1.44\times 10^{-3}]\\\\pOH=2.84

Hence , this is the required solution .

3 0
2 years ago
HURRY PLEASE HELP <br><br> 5 x 10^4 ÷ 2.5 x 10^2 =
weqwewe [10]

Answer:

1600

Explanation:

5×10^4÷2.5×10^2

(5×10^4)

(10^4)

(5×40)

(200)

(200÷2.5)

(80)

(80×10^2)

(10^2)

(20)

(80×20)

Answer is 1600.

Sorry if it's not correct.

7 0
3 years ago
Which situation best represents convection
Sonbull [250]

Answer:

A hot air balloon taking off

Explanation:

4 0
2 years ago
Calculate the concentration of so42− ions in a 0.010 m aqueous solution of sulfuric acid. express your answer to four decimal pl
dimulka [17.4K]
<span>Answer: 0.00649M


The question is incomplete,
</span>

<span>You are told that the first ionization of the sulfuric acid is complete and the second ionization of the sulfuric acid has a constant Ka₂ = 0.012
</span>
<span>
With that you can solve the question following these steps"
</span>

<span>1) First ionization:
</span>
<span>
H₂SO₄(aq) --> H⁺ (aq) + HSO₄⁻ (aq)


Under the fully ionization assumption the concentration of HSO4- is the same of the acid = 0.01 M


2) Second ionization
</span>

<span>HSO₄⁻ (aq) ⇄ H⁺ + SO₄²⁻ with a Ka₂ = 0.012
</span>

<span>Do the mass balance:
</span>


<span><span>        HSO₄⁻ (aq)        H⁺        SO₄²⁻</span>
</span>
<span /><span /><span>        0.01 M  - x          x            x


</span><span>Ka₂ = [H⁺] [SO₄²⁻] / [HSO₄⁻]</span>
<span /><span>
=> Ka₂ = (x²) / (0.01 - x) = 0.012
</span><span />

<span>3) Solve the equation:


</span><span>x² = 0.012(0.01 - x) = 0.00012 - 0.012x</span>
<span /><span>
x² + 0.012x - 0.0012 = 0
</span><span />

<span>Using the quadratic formula: x = 0.00649
</span><span />

<span>So, the requested concentratioN is [SO₄²⁻] = 0.00649M</span>

4 0
3 years ago
Read 2 more answers
What makes an inference different from a quess?
frosja888 [35]

Answer:

Explanation:

Inferences are not based on anything from the text while guesses are made only using the text. Inferences are based on evidence in the text while guesses are not. Inferences are made by only using major details from the text while guesses only use minor details.

3 0
2 years ago
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