How much heat is needed to vaporize 25.0 kg of water (Ly - 540 kcal/kg)? 4.63 kcal
03.15 kcal
21,600 kcal
13,500 kcal

Answerthe force between the charges will be  f/9 (one-ninth of force f)explanationcoulomb's law relates the magnitudes  two point charges q₁ and q₂, the distance, r, between the charges, and the electrostatic force, f, between the two charges:     k represents coulomb's constant, k = 8.99×10⁹ n·m²/c².note that if we have r = 3r, then   

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