(
AHO)
The table shows the ghential energy and kinetic energy of asker attaro
Gitterentions on a hill
Position and Enery
Pestion tornyound, Kuretu Ereg Perential Eragi
100 meters
Onits 50.000 units
50 meters
What is the kinetic energy of the skiest a height of 50 meters above ground
29000 snits, because total energy remains on changes
80056 anittetuse toner remains unchanged
20000 units because total energy of the skier decreases
30.000 arts because tott energy of their decreases

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.