S the right ascensions of two stars at a location.

Name of star Right ascension
Star 1 2 hours
Star 2 4 hours 20 minutes

What is the degree difference between the two stars that rise at the location?

It's 35 degrees IF they have the same declination. If their declinations are different, then the angle between them can be anything from 35 degrees to 180 degrees.

hi there if you are asking for conformation that wavelingth is the correct answer is wrong it is the answer is frequency. : )

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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