Asound wave can be used to shatter a wine glass. this can be explained by which of these ? a) sound is a compression wave. b) the sound will interfere with the molecules in the glass. c) the sound resonantes at the natural frequency of the glass. d) if sound is loud enough it will have enough energy to break the glass

C) the sound resonates at the natural frequency of the glass

Explanation:

Resonance is a case that occurs when the frequency being played becomes equal to the natural frequency of the material. The natural frequency of a material is the frequency it generates when struck.

So, if the natural frequency of the wine glass and the frequency of the sound which is being subjected to glass become equal it results in the glass shattering.

magnityde and direction

  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