Answer:
b.
Explanation:
absorption, evaporation, and dissolving are all physical changes
bubbles forming, however, is a chemical reaction
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Answer:
Explanation:
Hello,
By applying the Dalton's law, we can compute the partial pressure of the helium has:
Now, solving for the partial pressure of the helium gas we get:
On the other hand, the mass of the helium gas is computed via the ideal gas equation in terms of the helium's mass:
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Answer:
the answer is true
I hope it will help you
Explanation:
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Answer:
B) exothermic.
Explanation:
Hello!
In this case, we need to keep in mind that exothermic reactions release heat, so they increase the temperature as the final energy is less than the initial energy; in contrast, endothermic reactions absorb heat, so they decrease the temperature as the final energy is greater than the initial energy.
In such a way, when a dissolution process shows off a negative enthalpy of dissolution, we infer it is an exothermic process due to the aforementioned; therefore, the answer is:
B) exothermic
.
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Answer:
Static electricity is transferred during charging by conduction when electrons from a charged from one object to another object by direct contact. For example, on a carpet, charges are transferred from a person's feet to the rest of his/her body.