Select from below all elements that follow the DUET rule (not the octet rule). (you can select multiple) a) Li

b) Mg

c) O

d)He

e) H

f) Ne

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

Using the thermodynamic information in the aleks data tab, calculate the standard reaction free energy of the following chemical reaction: →+p4o10s6h2ol4h3po4s round your answer to zero decimal places.

Find the number of moles of argon in 364g of argon.