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1. Question: What is the molar mass of CaSO4?
2. Question: Based on the balanced chemical equation: 2 NH3 + 3 CuO → 3 Cu + N2 + H2O, which of the following statements is NOT true?
3. Question: How many atoms of oxygen are there in the molecule Al2(SO4)3?
4. Question: How many grams of H2O are in 0.2 moles of H2O (molar mass 18.01 g/mol)?
5. Question: What allows us to convert from moles of one substance to moles of another substance?
6. Question: Balance the reaction V + O2 → VO. When balanced, what is the coefficient in front of V?
7. Question: What is the balanced form of the reaction: FeCl3 + NaOH → Fe(OH)3 + NaCl?
8. Question: 2 moles of AlCl3 were reacted as shown by the balanced reaction below. How many moles of MgCl2 formed?
9. Question: A chemist dissolved 24 grams of CaCl2 (molecular mass 110.98 g/mol) in water to prepare a solution with a total volume of 360 mL. What is the molarity of this solution?
10. Question: What formula would you use to prepare a dilute solution from a concentrated solution?
11. Question: You are preparing a solution from 750 L of a 3.0 M NaCl solution. How many L of a 1.5 M NaCl solution could you produce by diluting the original solution?
12. Question: How many ions would you expect MgBr2 to break down into in water?
13. Question: A chemist dissolves FeBr3 in water to make a 2.0 M solution. What is the osmolarity of this solution?
14. Question: The KMT describes the behavior of an ideal gas. Specifically: Select all that apply.
15. Question: A sample of gas is cooled at a constant pressure. I would expect the volume of the gas to:?
16. Question: At an unchanging temperature, an 80 L sample of gas with a pressure of 2.0 ATM is compressed to a volume of 70 L. What is the pressure of the compressed gas?
17. Question: A 9.0 L container of gas has a pressure of 3.0 ATM at 20 degrees C. How many moles of gas are in this container?
18. Question: A bubble with a volume of 2.00 mL at a pressure of 3.00 ATM and a temperature of 265 K rises to just below the surface of the water, where the pressure is 1.00 ATM and the temperature is 270.0 K. What will the new volume be in mL?
19. Question: When the reaction here goes in the backward direction, what is acting as the base? H3O+ + PH3 ⇌ PH4+ + H2O.
20. Question: HCl and LiOH react in a neutralization reaction. What two products would I expect from this reaction?
21. Question: Choose the values of pH which would be considered basic. Select all that apply.
22. Question: The conjugate acid of NH3 would be?
23. Question: If I added a few drops of acid to a small beaker of solution with a pH of 6.4 and after the addition of these drops, the solution remained at a pH of 6.4, I would expect that the solution was?
24. Question: While preparing a buffer, you have prepared a solution containing CN- ions. What would you add to this solution next to prepare this buffer?