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(a)
Interpretation:
The temperature at the surface of sun has to be estimated.
Concept Introduction:
Wien's displacement law:
It states that black body radiation curve at various temperature get higher at particular wavelength. The mathematical equation for Wien’s law is given as
T is absolute temperature in kelvins.
b is a Wien's displacement constant.
(b)
Interpretation:
The astronomers able to determine temperature of star has to be explained.
Concept Introduction:
Wien's displacement law:
It states that black body radiation curve at various temperature get higher at particular wavelength. The mathematical equation for Wien’s law is given as
T is absolute temperature in kelvins.
b is a Wien's displacement constant.
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Chapter 7 Solutions
Connect 1 Semester Access Card for General Chemistry: The Essential Concepts
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- The dissociation of the weak acid, nitrous acid, HNO2, takes place according to the reaction: HNO2 (aq) ⇌ H+(aq) + NO2–(aq) K=7.2 X 10-4 When 1.00 mole of HNO2 is added to 1.00 L of water, the H+ concentration at equilibrium is 0.0265 M.A) Calculate the value of Q if 1.00 L of water is added? B) How will reaction shift if 1.00 L of water is added?arrow_forwardSuppose a certain copolymer elastomeric material “styrene-butadiene rubber”) contains styrene ("S") monomers –(C8H8)– and butadiene ("B") monomers –(C4H6)– and that their numerical ratio S:B = 1:8. What is the mass ratio mS:mB of the two monomers in the material? What is the molecular mass M of a macromolecule of this copolymer with degree of polymerization n = 60,000? Data: AC = 12.01 u, AH = 1.008 u.arrow_forwardLab Questions from Lab: Gravimetric Determination of Calcium as CaC2O4•H2O What is the purpose of the methyl red indicator? Why does a color change to yellow tell you that the reaction is complete? Why is the precipitate rinsed with ice-cold water in step 4? Why not room temperature or hot water? Why is it important that the funnels be placed in a desiccator before weighing (steps 1 and 5)?arrow_forward
- What mass of ethylene glycol, HOCH2CH2OH, Mustbe added to 5.50 kg of water to antifreeze that would work for the car radiator to -10.0 degrees celcius? MM (g/mol): 62.07arrow_forwardWhat is the molarity of a 0.393 m glucose solution if its density is 1.16 g/mL? MM glucose 180.2 g/molarrow_forwardThe rate constant for the decay of a radioactive element is 2.28 × 10⁻³ day⁻¹. What is the half-life of this element in days?arrow_forward
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