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3 years ago

When the equation Al2(SO4)3 + NaOH + Al(OH)3 + Na2SO4 is correctly balanced, what is the coefficient of Al(OH)3?

1 answer:

4 0

The balanced chemical formula should be Al2(SO4)3 + 6NaOH = 2Al(OH)3 + 3Na2SO4

Therefore the coefficient of Al(OH)3 is 2!

Hope that helps :)

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The solubility of co in water at 0c and 1 atm co pressure is 0. 0354 mg of co in 1 ml of water. Calculate the moalrity of aqueso

Dmitriy789 [7]

From all the calculations that were carried out, the concentration of 2atm is 0.0026 M.

<h3>What is molarity?</h3>

The term molarity is defined as the number of moles divided by the volume of the solution. Using the formula; C = kp where

C = concentration
k = constant
p = pressure

C = 0. 0354 * 10^-3 g/28 g/mol × 1000/1 L

C = 0.0013 M

k = C/p = 0.0013 M/1 atm

k = 0.0013 Matm-1

Now;

C = 0.0013 Matm-1 * 2 atm

C= 0.0026 M

Learn more about molarity: brainly.com/question/12127540

4 0

2 years ago

What is the pH of a 3.5 x 10-5 M solution of HCl?

Luden [163]

Answer:

pH = 4.45

Explanation:

We need to find the pH of $3.5\times 10^{-5}\ M$ solution of HCl. We know that, pH of a solution is given by :

$pH=-log[H]^+$

Put all the values,

$pH=-log[3.5\times 10^{-5}]\\\\pH=4.45$

So, the pH of the solution of HCl is 4.45.

5 0

3 years ago

Use the Rydberg equation to calculate the wavelength (in Å) of the photon absorbed when a hydrogen atom undergoes a transition f

ivolga24 [154]

Answer:

1024Å

Explanation:

The Rydberg equation is an empirical relationship equation expressed by Balmer and Rydberg which is given as:

1/λ = $R_{H} (\frac{1}{n_{f} ^{2} }-\frac{1}{n_{i} ^{2} } )$ .............................(1)

where $R_{H}$ is the Rydberg constant given as $1.09 x 10^{7}m^{-1}$ , n is the transition level and the subscript f and i show the final and initial level numbers respectively. λ is the wavelength.

$n_{f}$ = 1

$n_{i} = 3$

Using equation (1), we have

1/λ $= 1.097 x 10^{7}(\frac{1}{3^{2} }- \frac{1}{1^{2} })$

= $1.097 x 10^{7} (\frac{1}{9} -\frac{1}{1} )$

= $1.097 x 10^{7}(0.11-1)$

= $1.097 x 10^{7} (-0.89)$

= - 9763300

λ = $-\frac{1}{9763300}$

= $-1.024x 10^{-7}m$

We should note that the negative sign we have is as a result of photon absorption whereby the hydrogen atom gains energy to undergo a transition from the lower energy level to a higher one. Wavelength does not have a negative value.

To convert to Å, we have

λ = $\frac{1.024 x 10^{-7} }{10^{-10} }$ = 1024Å

Therefore the wavelength of the photon in Å is 1024Å

7 0

3 years ago

What type of chemical reaction occurs in Ca + Cl2— CaCl2?

kodGreya [7K]

Combination reaction

7 0

4 years ago

Which mineral property is easily observed but can be unreliable when it comes to mineral identification

patriot [66]

I believe it is the color

7 0

3 years ago