What type of reaction is this?

2K + MgBr2 → 2KBr + Mg

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

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.