An electron is present at an energy level with an energy of 16.32 x 10−19 j. during a transition to another level, 5.4 x 10−19 j of energy was absorbed. which of the following is true about the present state of the electron? the electron moved down to an energy level and has an energy of 10.92 x 10−19 j. the electron moved down to an energy level and has an energy of 21.72 x 10−19 j. the electron moved up to an energy level and has an energy of 10.92 x 10−19 j. the electron moved up to an energy level and has an energy of 21.72 x 10−19 j.

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

How do dying stars contribute to the formation of planets

Predict the reactants of this chemical reaction. that is, fill in the left side of the chemical equation. be sure the equation you submit is balanced. (you can edit both sides of the equation to balance it, if you need to.) note: you are writing the molecular, and not the net ionic equation. > cacl2(aq) + h20(l)