When answering the questions below: show all work and round to the proper number of significant figures. 1. Convert 0.323 moles of Cu to atoms of Cu

2. How many moles contain 2.89x1027 formula units of calcium carbonate?

3. How many atoms are contained in 150 g of argon?

4. How many formula units are present in 450.0 grams of lead (II) chloride?

5. What mass of iron (III) chloride contains 2.35x1023 chloride ions?

3. consider a process in which a gas with the properties of air expands at constant pressure as described by the cups of air discussion in class. one kilogram of air starts out at 1 atm and 290 k. the air expands its volume by absorbing a sufficient amount of thermal energy to increase the temperature at constant pressure to 350 k. a. on a p-v diagram, sketch this process with point a as the starting point and point b as the ending point. b. if the process is completely reversible, calculate the thermal energy added from an external source. c. calculate the entropy change for this process assuming it is reversible. d. calculate the work delivered externally if this is a reversible process. e. if the process is completely irreversible, calculate the amount of entropy change for the process that is due to irreversibilities. f. if the process is completely irreversible, calculate the amount of thermal energy added from an external source and compare this result to the thermal energy calculated in part b. g. for the completely irreversible process, calculate the entropy change due to this thermal energy addition. h. for the completely irreversible process, calculate the total entropy change and compare it to the entropy change in part c.