Answer: see below
Explanation:
1. Change in smell
2. Heat given off
3. New substance (cake) cannot be separated into the original ingredients
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solution:
You need to find the frequency, and they have already given you the wavelength. And since you already know the speed of light, you can use formula (2) to answer this problem. Remember to convert the nano meters to meters because the speed of light is in meters. 

Viscosity is basically how thick a liquid is so pancake syrup would be the answer
Explanation:
Equation for Calcium Hydroxide Dissolving in Water | Ca(OH)2 + H2O
Answer:
C. The splitting apart of atomic nuclei
Explanation:
Nuclear fission is the splitting apart of atomic nuclei.