Determine the expected diffraction angle for the first-order reflection from the (111) set of planes for fcc nickel (ni) when monochromatic radiation of wavelength 0. 1937 nm is used.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.