Five gases combined in a gas cylinder have the following partial pressures: 3 point 0 0 atm open paren cap n sub 2 close paren , 1 point 8 0 atm open paren cap o sub 2 close paren , 0 point 2 9 atm Ar , 0 point 1 8 atm He , and 0 point 1 0 atm cap h What is the total pressure that is exerted by the gases? Use cap p sub cap t is equal to cap p sub 1 plus cap p sub 2 plus cap p sub 3 plus dot dot dot cap p sub n