known to communicate with its own species by secreting a small molecule called bactoX (MW = 113.7 g/mol). A. Each bacterium contains 5140 bactoX molecules that can be secreted. How many moles of bactoX are present in a 1.9 µL sample volume that contains 4.444 x 10° bacterial cells? moles: mol B. Calculate the molarity (mol/L) of bactoX in the 1.9 µL sample volume if all of the bacteria were to simultaneously secrete all of the bactoX molecules contained within their cell bodies into the vial.

Propose a serial dilution that would give a dilution of 1/153 000 000. Each tube in your dilution series must have a volume of 50 ml or less.

This is for the last question "I am not sure how to answer 6a-d" Also if you could answer 4 and 5 as well

This is a question regarding spectrophotometry. Scenario: 0.1 mL of the unknown and 0.9 mL of distilled water are mixed in a cuvette and the absorbance is measured at 280 nm. Given the absorbance, molecular mass and the extinction coefficient of the unknown are 0.253, 16950 g and 13940 M-1cm-1 respectively, and the path length is 1 cm, how can I find the concentration of the unknown in mg/mL by Beer-Lambert Law (NOT molarity M)?