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2 years ago

What is the pH of a 4.08*10-'M solution of H30+?

Chemistry

1 answer:

Mariana [72]2 years ago

4 0

Answer:

8.4

Explanation:

-log(4.08x10^-9) = 8.4

- Hope that helped! Please let me know if you need further explanation.

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A reaction generates hydrogen gas (H) as a product. The re-

Amiraneli [1.4K]

<u>Answer:</u> The average rate of the reaction is $7.82\times 10^{-3}M/min$

<u>Explanation:</u>

To calculate the molarity of hydrogen gas generated, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Moles of hydrogen gas = $3.91\times 10^{-2}mol$

Volume of solution = 250 mL = 0.250 L (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

$\text{Molarity of }H_2=\frac{3.91\times 10^{-2}mol}{0.250L}=0.1564M$

Average rate of the reaction is defined as the ratio of concentration of hydrogen generated to the time taken.

To calculate the average rate of the reaction, we use the equation:

$\text{Average rate of the reaction}=\frac{\text{Concentration of hydrogen generated}}{\text{Time taken}}$

We are given:

Concentration of hydrogen generated = 0.1564 M

Time taken = 20.0 minutes

Putting values in above equation, we get:

$\text{Average rate of the reaction}=\frac{0.1564M}{20.0min}\\\\\text{Average rate of the reaction}=7.82\times 10^{-3}M/min$

Hence, the average rate of the reaction is $7.82\times 10^{-3}M/min$

6 0

2 years ago

4. Define oxidation and reduction in terms of the gain or loss of electrons.

Andreyy89

$\mathbb\color{cyan}{\tiny A\scriptsize N\small S\large W\Large E\huge R}$

Oxidation is loss of electrons, gain of oxygen or loss of hydrogen.
Reduction is gain of electrons, loss of oxygen or gain or hydrogen.

3 0

2 years ago

_____ stars can be between one thousand times dimmer and one million times brighter than the Sun.

dmitriy555 [2]

Answer:

The answer is

D. Main sequence

Explanation:

Main sequence stars can be between one thousand times dimmer and one million times brighter than the Sun.

What is main sequence stars?

A main sequence star is any star that is fusing hydrogen in its core and has a stable balance of outward pressure from core nuclear fusion and gravitational forces pushing inward.

6 0

3 years ago

A sample of an uranium compound is found to be losing mass gradually. Explain what is happening to the sample.

yan [13]

Answer:

The uranium in the sample of the compound is radioactive

Explanation:

Some atoms can split on their own. Some split when bombarded by energetic particles. Such atoms are said to be radioactive.

Radioactivity is borne out of the drive of an atom to reach stabillity. Every atom have a specific neutron/proton ratio which ensures stability of the nucleus. A nucleus with a stability ratio different from that which makes it stable will become unstable and split into one or more other nuclei with emissons of energetic particles.

Note: neutrons and protons dictates the mass of an atom. They are located in the nucleus which is the site for nuclear radioactive reactions.

4 0

2 years ago

In which of these ways can volcanoes help build up land?

Neporo4naja [7]

C) by adding lava.
Heat, gasses and water vapour do not create land. Lava can solidify, become a rock,which can become new lan

7 0

3 years ago