Aqueous lithium hydroxide is used to purify air in space crafts and submarines because it can absorb the carbon dioxide that is exhaled: 2 LiOH(aq) + CO 2 (g) → Li 2 CO 3 (aq) + H 2 O(l). What volume of carbon dioxide can be removed from the cabin of a
spacecraft, which is kept at 25°C and 0.97 atm, if the gas reacts with a mass of 15.0 g of lithium hydroxide?

How many moles of gas are present if p=11 atm, v=12l, t=185k?

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.

An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³