Chemistry Unit 01: Matter in Motion

1. 1. How many moles are in a 2.3g sample of MgCl₂? 
2. 2. What is STP?
3. 3. What is the volume of 1.2 moles of CO₂ at STP?
4. 4. When dealing with gas laws, it is important to remember to convert temperatures into ___________________.
5. 5. What are the postulates of kinetic molecular theory?
6. 6. What is the new pressure of 75 mL of a gas that is compressed to 50 mL when the original pressure was 1.02 atm and the temperature was held constant?
7. 7. A sample of gas in a rigid container at 15.2^oC and 1.25 atm has its temperature increased to 45.0^oC. What will be the new pressure?
8. 8. Calculate the approximate volume of a 4.24 mol sample of a gas at -20^oC and a pressure of 3.75 atm.
9. 9. Why does doubling the temperature of an idea gas in a closed vessel double the pressure?
10. 10. What is the mass of 2.4 moles of glucose (C₆H₁₂O₆)?
11. 11. How many moles is 7.5 x 10²² molecules of water?