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2 years ago

What is hydrogen ion concentration of an acid solution whose PH is 3.4?

1 answer:

meriva2 years ago

4 0

It’s easy, if the PH of any acidic solution = -Log[H+], where [H+] is hydrogen ion concentration, multiply each term by (-1) then raise each term as a power to (10), so it will become like this:-
[H+] = 10^(-PH)

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The solubility of KNO3(s) in water increases as the..

makvit [3.9K]

The answer would be b. Temperature of the solution increases

Temperature determines the kinetic energy of the water molecule. Higher temperature will cause the molecule to moves faster and the compound (KNO3) could break solute molecule easier make it become more soluble. A higher pressure will increase the solubility of a gas, not solid

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3 years ago

Atoms try to have the same number of protrons and electrons. True or false

Dima020 [189]

Answer:

False

Explanation:

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2 years ago

Copper is a solid phase of copper still unknown to science. The only difference between it and ordinary copper is that Copper fo

Scrat [10]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The density is $\rho = 8.21479 g/cm^3$

Explanation:

From the question we are told that

the lattice constant is $a = 0.295 nm = 0.295*10^{-9} = 0.295*10^{-7} cm$

The density of Copper ( $\beta$ ) is mathematically represented as

$\rho = \frac{ZM}{a^3N_A}$

Where Z is the number of units in a unit cell and for BCC crystals Z =2

M is the molar mass of copper which same for Copper with a value of

$M = 63.5 g/mol$

$N_A$ is the Avogadro's constant with a value of $N_A = 6.022*10^{23}$

Substituting values

$\rho = \frac{2 *63.5}{(0.295*10^{-7})^3 * (6.022*10^{23})}$

$\rho = 8.21479 g/cm^3$

8 0

2 years ago

If a solution containing 45.101 g of mercury(II) acetate is allowed to react completely with a solution containing 12.026 g of s

AnnyKZ [126]

Answer:

14.533 grams of solid precipitate of mercury(II) dichromate will form.

Explanation:

$Hg(CH_3COO)_2(aq)+Na_2Cr_2O_7(aq)\rightarrow HgCr_2O_7(s)+2CH_3COONa(aq)$

Moles of mercury(II) acetate = $\frac{45.101 g}{318.70 g/mol}=0.14152 mol$

Moles of sodium dichromate = $\frac{12.026 g}{261.97 g/mol}=0.045906 mol$

According to reaction , 1 mole of sodium dichromate reacts with 1 mole of mercury(II) acetate , then 0.045906 moles of sodium dichromate will recat with :

$\frac{1}{1}\times 0.045906 mol=0.045906 mol$ of mercury(II) acetate

This means that mercury(II) acetate is present in an excess amount and sodium dichromate is present in limiting amount.So, amount of precipitate will depend upon moles of sodium dichromate.

According to reaction , 1 mole of sodium dichromate gives 1 mole of mercury(II) dichromate , then 0.045906 moles of sodium dichromate will give :

$\frac{1}{1}\times 0.045906 mol=0.045906 mol$ of mercury(II) dichromate

Mass of 0.045906 moles of mercury(II) dichromate:

0.045906 mol × 316.59 g/mol = 14.533 g

14.533 grams of solid precipitate of mercury(II) dichromate will form.

3 0

3 years ago

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the soun

Shtirlitz [24]

Answer:

Yes, I would be able to hear the speaker clearly because the supposedly dropping off of sound as the distance gets farther is counteracted by "reverberations" inside the auditorium.

Explanation:

According to the "Inverse Square Law," if the distance from the sound source is doubled, the intensity of the sound will diminish by 6 decibels. This is true if the situation is in a "free field," which means the sound has no reflection.

However, this is not the case in an "auditorium." An auditorium causes the "reverberation" of sound. This prolongs the resonance of the sound. So, this means that even if the sound drops off by a factor of 100 (20 decibels), due to reverberations, the height of the ceiling, the kind of wall and materials used in making the seats also affect the intensity of the sound waves. This is the reason why auditoriums are used as venues for concerts, presentations and the like where a large group of people serve as the audience.

4 0

3 years ago

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What is hydrogen ion concentration of an acid solution whose PH is 3.4?​

What is hydrogen ion concentration of an acid solution whose PH is 3.4?