What is the temperature of 0.750 mol of a gas stored in a 6,850 ml cylinder at 2.21 atm? use pv=nrt and r=0.0821 (l•atm)/(mol•k) a.)2.95 k b.)5.24 k c.)138 k d.)246 k

Calculate the number of molecules present in 0.750 mol of mgo.

What can be found in the ionosphere

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 ?