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2. Perform the following unit conversions: a. 252 nm to miles (nm to m to km to miles) b. Convert 65.0 miles/hour to cm/sec (miles to km to m to cm) c. A chemistry teacher spends 5 minutes grading 1 student's lab. She has 150 students who turn in lab papers for each lab. If we do 25 labs in class, how many minutes will I spend grading lab papers? d. Each dimensional analysis problem has taken you 1.5 minutes to complete. How many dimensional analysis problems could you complete in 6 weeks of chemistry class (242 minutes a week)? 3. Liquid sodium metal has a density of 0.93 g/cm3. How many pounds of liquid sodium are needed to fill a container whose capacity is 9.00 L