High School General Chemistry worked out Questions for PreTest, Homework Help


Hey I need the answer and work to these asap! Meaning I need you to explain to me how you got the answer! All the questions are related! Let me know if you have any questions!!

SHORT ANSWER (work included)

2K(s) + 2H2O(l) > 2KOH(aq) + (H2(g)        (for questions 5-10)

5)Convert 25.46g of potassium to moles

6) If the resulting aqueous solution of potassium hydroxide contained 14.65g of solute and had a volume of 0.75L, calculate the molarity

7)The hydrogen gas released was captured in 2.0L container. If 5.67g of H2 was collected at 26.5degreesC, what would be the pressure of the sample?

8) How many grams f water would be necessary to completely react 55.0g of potassium?

9) If the hydrogen gas was collected into a rigid container at 27degreesC and 101 kPa, but then heated to 85degreesC, what would be its new pressure?

10)Which has stronger intermolecular forces H20 or H2? Explain.