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___________ are modified epidermal cells which open and close for gas exchange/prevent water loss.   

Which type of root is shown in this cross section? RanunculusRoot.jpg

Match the term to the correct structure labeled as X on the bacteria bellow

What is the age of this tilia tree slide Tilia age.jpg

@X@user.full_name@X@ @GMU: Closed-tube manometers work exactly as barometers except by connecting them to a container its pressure can be measured. Assume you have a closed-ended manometer filled with an oil having a density of 0.8114 g/mL at 20°C rather than mercury (density = 13.546 g/mL at 20°C). What is the pressure if the height of the oil column is 855.74 cm?

@X@user.full_name@X@ @GMU: Draw the lewis dot structure of PCl5. How many lone-pairs of electrons (first) and bonding pairs of electrons exist on the molecule PCl5?

@X@user.full_name@X@ @GMU: Assume you have an open ended manometer filled with an oil having a density of 0.7277 g/mL at 20°C rather than mercury (density = 13.546 g/mL at 20°C). What is the pressure in atmospheres if the level of the arm open to the atmosphere is 178.00 cm higher than the level in the arm connected to the gas sample? The atmospheric pressure reading is 731.42 mm Hg.

@X@user.full_name@X@ @GMU: Closed-tube manometers work exactly as barometers except by connecting them to a container its pressure can be measured. Assume you have a closed-ended manometer filled with an oil having a density of 0.8107 g/mL at 20°C rather than mercury (density = 13.546 g/mL at 20°C). What is the pressure if the height of the oil column is 1152.70 cm?

@X@user.full_name@X@ @GMU: How much work has been done when the volume of a gas changes from 12.47 L to 18.88 L at a constant pressure of 2.138 atm and temperature?

@X@user.full_name@X@ @GMU: What is the mole fraction of C3H8 in a mixture of 13.92 g of C3H8 and 11.1159 g of H2S?