20 points

the table compares the wavelength of some unknown electromagnetic waves.

comparison of wavelength electromagnetic wave wavelength
electromagnetic wave wavelength
a. 10− ^4 m
b. 10− ^6 m
c. 10^2 m
d. 10^2 m

which electromagnetic wave has the highest frequency? explain your answer.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.