Why does the amount of energy received from a small light source decrease as the distance from the light source increase

What is the most common way atoms combine

The half-life of radon-222 is 3.8 days. If a sample currently contains 3.1 grams of radon-222, how much radon-222 did this sample have 15.2 days ago? a 12.4 grams b 47.1 grams c 49.6 grams d 57.8 grams

How does the vapor pressure of water at 10 c compare with its vapor pressure at 50 c?

If 2.25 g of NH 3 reacts with 3.38 g of O2 and produces 0.450 L of N 2 at 295 K and 1.00 atm, which reactant is limiting?

Which is an example of the use of activation energy? A. Plugging in an iron B. Playing Basketball C. Holding a match to a paper D. Eating

For the separation of the unknown mixture, you are instructed to isolate the amine followed by the acid and finally the neutral. Does the order matter? If not, what other orders could be followed?

As ice melts and changes from solid to liquid, A) entropy increases. B) kinetic energy decreases. C) an exothermic reaction occurs. D) the random movement of molecules remains constant.

What volume of 0.480 m koh is needed to react completely with 15.8 ml of 0.150 m h2so4? assume the reaction goes to completion?

Which sample of water contains particles having the highest average kinetic energy?

Use the terms magnetic field and magnetic pole in a sentence