Can someone give me advice on how to do this

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.

Define a is a tiny pavket of energy

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work