In the following reaction 2c6h6 + 15o2 12co2 + 6h2o how many grams of oxygen will react with 10.47 grams of benzene (c6h6)?

                                =
                                = 0.134 mol

mol of oxygen: 
                 ratio of 
                 =  2 : 15
                 =  1 : 7.5

: . mol of  = 0.134mol * 7.5
                                         = 1.01 mol

Mass of Oxygen = mol * Mr
                           = 1.01 mol * (16*2) g/mol
                           = 32.22g 

Note: Mr is molar mass

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.