For a particular formic acid buffer (pKa of HCOOH is 3.74), the ratio of CHOO- to CHOOHr at pH 4.25 was 3.236. If you have 100 mL of the buffer and the total ion concentration (CHOOH and CHOO-) is 0.20 M, how many moles of NaCHOO do you need to add to raise the pH to 4.71?

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.