A fictional cubed-shaped bacterium, Bacterius cubis, occupies a volume of 2.1 femtoliters. This particular type of bacteria is known to communicate with its own species by secreting a small molecule called bactoX (MW = 130.9 g/mol). Answer the following questions regarding this bacterium.

A) Each bacterium contains 9.780 x 103 bactoX molecules that can be secreted. How many moles of bactoX are present in a 1.6-pL sample volume that contains 6.790 x 106 bacterial cells?
Number ................. mol
B) Calculate the molarity (mol/L) of bactoX in the 1.6-pl_ sample volume if all of the bacteria were to simultaneously secrete all of the bactoX molecules contained within their cell bodies into the vial.
Number ................. M
C) Scientists discovered that bactoX will induce a luminescence response in B. cubis when the concentration in a sample reaches 5.10 x 0:12 M. How many molecules of bactoX must be present in solution to initiate luminescence in a 1.7-pL sample? How many individual bacteria cells does this represent (the number of bactoX molecules per cell is given in part A)?

Number ................. molecules

Number ................. cells
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D) What volume (in nanoliters) would the bacteria cells in part C occupy if tightly packed (assume there is no space between the cells)?

Number ................. nL

Answer rating: 100% (QA)

A Concentration of bactoX 9780 x 10 3 molecules bacteria Number of bactoX in 3682000 bacteria BactoX ... View the full answer