Early Earth was constantly being bombarded by meteorites, comets, and asteroids.
Was early Earth an open system or a closed system?

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)

If i had 2 m naoh solution, what does the 2 m stand for? 2 molar, but 2 of a solute in 1