Determine the number of atoms per unit cell for each of the following metals. Unit cells of polonium, tungsten and nickel. Polonium's unit cell has eight atoms at the corners of the cell (one eighth in and seven eighths out). Tungsten's unit cell has one atom in the center of the cell and eight atoms at the corners of the cell (one eighth in and seven eighths out). Nickel's unit cell six atoms within the faces of the cell (half in and half out) and eight atoms at the corners of the cell (one eighth in and seven eighths out). . Part A Polonium Express your answer as an integer.

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.

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

Which statement best describes the flow of energy in this scenario