Reflection occurs when a wave

The correct answer is " bounces off an object".

Explanation:

Reflection occurs when a wave bounces off an object.  

For example, when a ray of light incidents on the surface of a plane mirror. The light gets reflected from the plane mirror because of the silver polishing on the backside of the mirror.

There are two laws of reflection:

(1) The reflected ray, the incident ray and the normal to the surface of the mirror are all lie in the same plane.

(2) The angle of reflection is equal to the angle of incidence.

show the diagram then i will answer

  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