What happens if an opaque object is placed in the path of light? a) light bends when it hits the object. b) light does not pass through the object. c) light completely reverses its direction. d) light pierces the object and continues to travel.

The correct option is B.

Explanation:

An opaque objects are those object which does not allow light to pass through them. It blocks the path of light.

For example, wood.

When an opaque object is placed in the path of light then light does not pass through the object.

Light continue travels in a straight path until it bounces off the ground. Then, it will form a shadow.

Therefore, the correct option is B.

  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

thermal energy is the answer