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Katyanochek1 [597]
3 years ago
9

How do you answer this? does anyone know the equation you use?​

Chemistry
1 answer:
bonufazy [111]3 years ago
6 0

number 18 is 40.3kj/mol

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Whats 2 + 2? correct answers only
spayn [35]

9

Explanation:

cause 2 + 2 is equal to 9

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3 years ago
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During chemical weathering, forsterite is dissolved by the carbonic acid in rainwater. The weathering reaction is as follows:
Semenov [28]

Answer:

Keqq = 310

Note: Some parts of the question were missing. The missing values are used in the explanation below.

Explanation:

<em>Given values: ΔH° = -178.8 kJ/mol = -178800 J/mol; T = 25°C = 298.15 K; ΔS° = -552 J/mol.K; R = 8.3145 J/mol.K</em>

Using the formula ΔG° = -RT㏑Keq

㏑Keq = ΔG°/(-RT)

where ΔG° = ΔH° - TΔS°

㏑Keq = ΔH° - TΔS°/(-RT)

㏑Keq = {-178800 - (-552 * 298.15)} / -(8.3145 * 298.15)

㏑Keq = -14221.2/-2478.968175

㏑Keq = 5.73674166

Keq = e⁵°⁷³⁶⁷⁴¹⁶⁶

Keq = 310.05

4 0
3 years ago
A substance that cannot be broken down into other substances by ordinary chemical procedures is an
Hatshy [7]
An ELEMENT is a substance that cannot be broken down into other substances by ordinary chemical procedures.  Some easy examples would be:  <span>gold, iron, carbon, </span>hydrogen<span>, </span>oxygen<span>, nitrogen.</span> 
5 0
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The pOH of a solution is 6.0. Which statement is correct?
I am Lyosha [343]

Answer : Option D) The pH of the solution is 8.0.

Explanation : pOH of a solution is a measure of hydroxide ion (OH^{-}) concentration in a particular solution. It gives the measure of alkalinity of a solution. Normally, aqueous solutions at 25°C have pOH which is less than 7 are usually alkaline, when pOH is found to be greater than 7 then they are acidic and when pOH will be equal to 7 then it is neutral.

pH + pOH = 14, this relationship is used to find pH of any unknown solution with given pOH value,

Here, we known pOH is 6.0, so we get,

pH = 14 - 6 = 8.0;

Hence, the pH will be 8.0.

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3 years ago
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What is the Hercules beetle’s scientific name?
I am Lyosha [343]

Answer:

Hercules beetles, Dynastes hercules, occur in the new world tropics of Central and South America.

Explanation:

The southern Mexican border to west central Bolivia represent the species' northern and southern limitations, respectively.

3 0
2 years ago
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