½h2(g) + ½i2(g) → hi(g), δh = +6.2 kcal/mole 21.0 kcal/mole + c(s) + 2s(s) → cs2(l) the temperature of the surroundings will: increase or decrease

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

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.

How does blood clotting prevent the entry of pathogens through cuts and wounds? answer asap,, this is due tomorrow. will mark as brainliest or whatever you call it : )