Can someone , ? ?
chemistry

9. the molecular mass of sodium oxide (na2o) is
a. 61.97894.
b. 22.98977.
c. 38.98917.
d. 45.97954.

10. a substance that contains hydrogen that may be replaced by a metal is a/an
a. colloid.
b. acid.
c. nonmetal.
d. base

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.