Can you please solve the questions on this page? Thank you! 9. Predict what effe
ID: 576505 • Letter: C
Question
Can you please solve the questions on this page?Thank you! 9. Predict what effect increasing CaCl the charge of the metal ion has on the sokubility in water of KCI compared with 43. a. The solubility of KCI is greater than that of CaCl, due to stronger C to stronger Coulombic fonces in solubility of KCI is greater than that of Cacl, due to weaker Coulombic forces in The solubility of KCI is less than that of CaCl, due to weaker Coulombic forces in the the KCI. The the KCI. e. KCI The solubility of KCI is less than that of Cacl, due to stronger Coulombic forces in the KCI d. 10. A certain mass of neon gas is contained in a rigid steel container. The same mass of helium gas is added to this container. Which of the following best describes what happens? Assume the temperature is constant A The pressure in the container increases but does not double b. The pressure in the container more than doubles. c. The pressure in the container does not change. d. The pressure in the container doubles. which of the following is a reasonable estimate for the volume of a balloon that has been filled with is g of oxygen gas at STP? DI c. 1L a. 501 . I0 L b. 200 L Two gases are removed from their original container and placed into a third container, where they react with each other. All three containers 12. have identical volumes, and all gases are at the same temperature. Which container has the lowest pressure? a. Container C after the reaction b. Container A before the reaction They all have the same pressure d. Container B before the reaction
Explanation / Answer
(10)
The correct answer is (b): the pressure in the container more than doubles, this is because the same mass of Helium gas will contain more moles than the same mass of Neon gas, because molecular weight of Helium is much less than that of Neon, so the total moles in the container more than doubles, and so does the pressure.
(11)
The correct answer is (d): 10 L
This is because 1 mole of any gas at STP occupies 22.4 L volume
15 g of O2 is less than half the mole, so 10 L is the appropriate assumption.
(12)
The correct answer is (d): Container B before the reaction
Since temperature and volume is constant for all the containers, so the pressure is directly proportional to number of moles of gas present.
Container B has the lowest moles before the reaction.
Hope this helps !