(5 points) how many moles of oxygen are necessary to completely react with propane
(c3h8) to produce 16.3 mol of water according to the following balanced chemical
equation?
c3h8 + 5 o2  3 co2 + 4 h2o
7. (10 points) what mass of barium hydroxide is necessary to react with 253 g of
phosphoric acid (h3po4) according to the following balanced chemical equation?

2 h3po4 + 3 ba(oh)2  ba3(po4)2 + 6 h2o
8. (5 points) what volume of carbon dioxide (co2) gets produced when 8.0 l of octane
(c8h18) react with excess oxygen according to the following balanced chemical
equation?
2 c8h18 + 25 o2  16 co2 + 18 h2o

Will mark brainliest 26. which of these statements are true? (3 points) a. gases are compressible b. gases fill their containers completely c. the pressure of a gas is independent of the temperature d. gases have mass e. gases exert pressure f. the pressure of a gas is dependent on the volume g. gas pressure results from the collisions between gas particles h. gases have a definite volume and shape

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.

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers