The presence of which ion usually produces a colored solution? A. K+ B. F-
C. Fe2+
D. S2-

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

What is the typical rotational frequency frot for a molecule like n2 at room temperature (25∘c)? assume that d for this molecule is 1å=10−10m. take the total mass of an n2 molecule to be mn2=4.65×10−26kg. you will need to account for rotations around two axes (not just one) to find the correct frequency. express frot numerically in hertz, to three significant figures.