Nitrogen has a melting point of -210.0°c and a boiling point of -195.8°c. a sample of nitrogen is heated from -215.0°c to -200.0°c. which of the following best describes what happens to the nitrogen atoms during this transition?
a.
they gain enough energy to move relative to one another.
b.
they gain so much energy that the attractive forces between them have no effect on their motion.
c.
they lose enough energy to be held in a permanent location.
d.
the attractive forces between them decrease, allowing the atoms to move relative to one another.

Which best explains why an iceberg floats?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

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.