Light passes from substance a into substance b as shown. what could these two substances be? a. a could be water (speed of light = 225,000 km/s); b could be air (speed of light = 300,000 km/s). b. a could be water (speed of light = 225,000 km/s); b could be glass (speed of light = 200,000 km/s). c. a could be ruby (speed of light = 170,000 km/s); b could be sapphire (speed of light = 170,000 km/s). d. a could be water (speed of light = 225,000 km/s); b could be diamond (speed of light = 120,000 km/s).

answer; ///i believe that the correct answer is (carbon); good luck

  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

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.