Q14: Our sun
Q15: The strong magnetic reaction in our atmosphere
Answer:

Explanation:
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In this case, the molar enthalpy of reaction is obtained by dividing the involved energy by the reacting moles:

Thus, it is important to notice that the compound "uses" the energy, it means that it absorbs the energy, for that reason the sign is positive. Moreover, computing the result in kJ/mol we finally obtain:

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Answer: acceleration= Change in velocity/ change in time
Explanation:
A= Delta v/ delta t
The charge would be -2 because there are 2 more electrons than protons, and electrons have a negative charge.