Calculate the efficiency of a compact fluorescent light bulb if it produces 30 J of light energy, while using 95 J of electrical energy. Show your equations.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

What happens to the atomic radius when an elctron is lost