A cornstalk grows from a seed that is watered and fertilized. Is this a physical or chemical change? Justify your answer. 1. А. В. Calculate the number of molecules in 60.0 g of C¢H12O6. С. Explain wave-particle duality of light.

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Chapter1: Chemical Foundations
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1. A.
A cornstalk grows from a seed that is watered and fertilized. Is this a physical or
chemical change? Justify your answer.
В.
Calculate the number of molecules in 60.0 g of C6H12O6.
C. Explain wave-particle duality of light.
A hydrogen atom with its electron in the n=6 energy level emits a photon of IR
light. Calculate (a) the change in energy of the atom and (b) the wavelength (in Å)
of the photon. RH=2.18×10-18 J.
D.
Е.
The wavelengths of two electromagnetic radiation is 800 nm and 300 nm,
respectively. Which one have relatively higher energy? Justify your answer.
F.
Name three electromagnetic radiations, whose speed is the same.
Transcribed Image Text:1. A. A cornstalk grows from a seed that is watered and fertilized. Is this a physical or chemical change? Justify your answer. В. Calculate the number of molecules in 60.0 g of C6H12O6. C. Explain wave-particle duality of light. A hydrogen atom with its electron in the n=6 energy level emits a photon of IR light. Calculate (a) the change in energy of the atom and (b) the wavelength (in Å) of the photon. RH=2.18×10-18 J. D. Е. The wavelengths of two electromagnetic radiation is 800 nm and 300 nm, respectively. Which one have relatively higher energy? Justify your answer. F. Name three electromagnetic radiations, whose speed is the same.
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