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scoundrel [369]
3 years ago
15

Identify and explain exothermic and endothermic reactions in terms of energy transfer

Chemistry
1 answer:
Ulleksa [173]3 years ago
5 0
Exothermic reaction is when the system releases energy to the surrounding, the energy (in the perspective of the system) will have a sign of negative, as the system is transferring energy towards the surrounding.

Endothermic reaction is when the system is absorbing energy from the surrounding, the energy (in the perspective of the system) will have a sign of positive, as energy is transferred to the system.
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3 years ago
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3 years ago
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9966 [12]

Answer:

im not sure but I hope this helps

Explanation:

I believe the equivalents is just the moles reactant/moles limiting reactant

water has a denisty of 1 g/mL. 1 L is 1000 ml so there are 1000g/L.

the molar mass of water is 18g/mol if you use the Liters in the equation above you can find the number of grams present. divide this number you found by 18 to find the moles.

now take the amount of the other reactant given and divide it by its own molar mass. this will give you the number of moles of that reactant.

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5 0
3 years ago
What are the spectator ions in the equation below? Select all that apply.
Licemer1 [7]

Answer:

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Explanation:

The Pb²+ ions react with the SO4²‐ ions to form a solid precipitate, i.e. they bond together and undergo a phase change;

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The way to do this type of question is to consider what changes and what doesn't, look at phase changes and oxidation state changes

7 0
3 years ago
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