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kirza4 [7]
3 years ago
15

Pls answer it will be really helpful

Chemistry
2 answers:
IRISSAK [1]3 years ago
4 0

Answer:

304 because 76% - 400 is 96, subtract 400 by 96

vlabodo [156]3 years ago
3 0
It’s 96 I believe? Sorry if I’m wrong
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Calculate the entropy change for the surroundings of the reaction below at 350K: N2(g) + 3H2(g) -> 2NH3(g) Entropy data: NH3
krek1111 [17]

Answer : The entropy change for the surroundings of the reaction is, -198.3 J/K

Explanation :

We have to calculate the entropy change of reaction (\Delta S^o).

\Delta S^o=S_{product}-S_{reactant}

\Delta S^o=[n_{NH_3}\times \Delta S^0_{(NH_3)}]-[n_{N_2}\times \Delta S^0_{(N_2)}+n_{H_2}\times \Delta S^0_{(H_2)}]

where,

\Delta S^o = entropy of reaction = ?

n = number of moles

\Delta S^0{(NH_3)} = standard entropy of NH_3

\Delta S^0{(H_2)} = standard entropy of H_2

\Delta S^0{(N_2)} = standard entropy of N_2

Now put all the given values in this expression, we get:

\Delta S^o=[2mole\times (192.5J/K.mole)]-[1mole\times (191.5J/K.mole)+3mole\times (130.6J/K.mole)]

\Delta S^o=-198.3J/K

Therefore, the entropy change for the surroundings of the reaction is, -198.3 J/K

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2 years ago
Give 1 example of a chemical reaction that is involved in coral<br> bleaching.
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2HCO3 - + Ca2+ CaCO3 + CO2 + H2O Bicarbonate (HCO3-) combines with calcium ions in the water to make calcium carbonate (CaCO3, limestone). This process can occur both within organisms such as corals or as a simple chemical reaction in the water itself.
3 0
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Why does ionization energy tend to increase as you move across a period
koban [17]
It tends to in increase because the size of the atoms increase. 
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evablogger [386]

Answer: Option (c) is the correct answer.

Explanation:

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Due to solar energy various chemical reactions take place in the food.

Thus, we can conclude that chemical energy is stored in our food and this chemical energy start out as light energy from the sun.

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Answer:

B. Conclusions are based on observations

Explanation:

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