Discussion Topic Globally, the winter of 2014–15 was the warmest winter on record at that time, but it sure
didn't seem that way for most of the eastern United States. This region experienced
record-low temperatures and extreme snowfall, especially in the northern and coastal
areas. During this period of extreme cold and snow, it was not uncommon to see
comments on social media disputing climate change. For example, some commenters
took pictures of huge piles of snow and added comments such as, "This doesn't look like
global warming."
Do these commenters have a point? Should extreme snowfall over the course of a
season cast doubt on the theory of global climate change? Make a scientific argument
explaining why you agree or disagree with these commenters.

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.

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?