Determine how many atoms/molecules in the following samples 1.32 moles Si =
7.29 mol CO2 =
712.4 g AuCI =

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?