When potassium carbonate and calcium chromate are mixed, which of the following will pass through a filter? a)k and cro4 only b)ca and co3 only c)k, cro4, ca and co3 d)none of the ions pass through

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 ?