Aconvertible with the top down is traveling north on a road at a speed of 23.0 m/s. an ambulance, traveling south at a speed of 42.0 m/s, approaches with its siren producing sound at a frequency of 2600 hz. (enter your answers in hz. assume that the speed of sound in air is 343 m/s.) (a) what frequency does the driver of the convertible observe as the ambulance approaches? (enter your answer to the nearest integer.) hz (b) what frequency does the driver of the convertible detect after the ambulance passes her? hz (c) repeat parts (a) and (b) for the case when the ambulance is traveling northbound. while ambulance overtakes hz after ambulance passes

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂

frequency or wavelenth of em radiation in a vacuum