How many particles are in 1.3x10^3 of g NH3 ?

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

Need so much on this one how many yards?