What is the wavelength of an electromagnetic wave that has a frequency of 2.45 x 10° Hz in a vacuum? (The speed of light in a vacuum is 3.00 x 10^8 m/s.) A. 8.17 m
B. 4.08 x 10^-10 m
C. 7.35 x 10^17 m
D. 1.22 x 10^-7 m

43.452

step-by-step explanation:

284 times .153 = 43.452

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

the role of the microscope world in creating new materials .