Xrays with a wavelength of 0.070 nm diffract from a crystal. two adjacent angles of x-ray diffraction are 45.6 and 21.0 what is the distance between the atomic planes responsible for the diffraction?

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

Which component of the earth’s atmosphere is decreased due to photosynthesis?

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.