What can we say about a polarizing filter with vertically aligned chemical molecules? A. It will allow vertically polarized light to pass through it. B. It will allow horizontally polarized light to pass through it. C. It will block unpolarized light. D. It will allow all light to pass through it unchanged.

Option-A

Explanation:

The light waves travel in the form of electromagnetic waves in one of the two planes. The magnetic waves are perpendicular to the electric waves. The waves which travel in more than one plane is known as unpolarized light like sun rays.

The polarizing filter converts the unpolarized light to the polarized light by allowing the light waves to flow only in one plane. When the polarizing filter is placed vertically, the vertical filter allows the vertical light rays to pass through it.

Thus, Option-A is correct.

B.  It will allow horizontally polarized light to pass through it.

Explanation:

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  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