A 70-kg 70-kg adult can die from injection of ~100 ng ~ 100 ng of botulinum neurotoxin or by inhaling -1 ug ~ 1 ug of the toxin. A sensitive assay for the neurotoxin can detect -200pg/mL~200pg/niL in 60 μL60 μL of milk or juice.
a. How many moles of neurotoxin (molecular mass 150000 g/mol) 150000 g/mol) are in 60 μL60 μL containing 200 pg/mL? 200 pg/mL? Express your answer with a prefix from Table 1-3.
b. How many molecules are in 100ng 100ng of neurotoxin?

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TABLE 1-3 Prefixes Prefix yotta zetta exa peta tera giga mega kilo hecto deca deci centi milli microf nano pico femto atto zepto yocto Symbol Y N E P T G M k h da d с m n a f a Z y Factor 10241024 10211021 10181018 10151015 10121012 1091.0 1061076 1031.03 10210² 10110¹ 10-110-1 10-210-2 10-310-3 10-610-6 10-910-9 10-1210-12 10-1510-15 10-1810-18 10-2110-21 10-2410-24