Argon (Ar) is an element in group 18. Argon is . a gas highly reactive
a metalloid
a good conductor of heat

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

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?

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.