How many kilojoules of heat will be released when exactly 1 mole of manganese, mn, is burned to form mn3o4 at standard state condaition?

If a planet rotates 360 degrees during a 24 hour time period, what does that tell us about the planet? a. the middle of the planet is in darkness b. the seasons on the planet vary every day. c. the planet runs on a 12-hour time clock. d. the temperature on the planet varies daily.

What overall charge must all compounds have

If a particle has z = 25 and 23 electrons, what is its charge?