Please help with these two questions I’m still in a quiz right now I was absent How many moles are in 1.88*10^24 atoms of sodium?

Another question to solve also:
How many grams are in 7.52*10^24 atoms of KCI?

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

What is the overall order of reaction for rate = k[no]2[o2]

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor