Systems in nature tend to undergo changes toward

(1) lower energy and lower entropy

(2) lower energy and higher entropy

(3) higher energy and lower entropy

(4) higher energy and higher entropy

Which of the following is an example of chemical energy? A windmill spinning. Electrons moving in an electrical circuit. Energy in an apple that a worm eats. Heat given off by a light bulb.

Describe 3 methods to increase the rate of dissolution for sugar in a cup of tea

Which substance can not be broken down by a chemical change? (1) ethane (3) silicon (2) propanone (4) water

How do higher temperatures influence a chemical change?

Which of the following characteristic must be present for a substance to be called a mineral

What would be the total mass of the products of a reaction in which 25 grams of table salt decomposes into the elements sodium and chlorine?

The nucleus of a Helium atom has a charge equal to twice the proton's charge. Let FN denote the magnitude of the force the Helium nucleus exerts on one of the electrons in a Helium atom, and let Fe denote the magnitude of the force one electron in

What can you say about the past four decades?

Calculate the percent yield for the reaction above if 25.0 grams of H2SO4 was actually produced and the theoretical yield was predicted to be 42.0 grams. (% yield = Actual / theoretical x 100) SO3 (g) + H200 H2SO4 (9) O 59.5 O 168 O 0.595 O 1.68

Why does hot water freeze faster than cold water?