Astarís light is shifted to the red part of the light spectrum.

what does this mean about the length of light waves and movement of the star?

a.
the wavelengths are getting shorter, meaning the star is moving toward the observer.

b.
the wavelengths are getting longer, meaning the star is moving toward the observer.

c.
the wavelengths are getting shorter, meaning the star is moving away from the observer.

d.
the wavelengths are getting longer, meaning the star is moving away from the observer.

  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

it is called kinetic energy