Compare to hardness of gypsum to an everyday substance

It is always feasible that a substance will dissolve in water when: A. Enthalpy is positive and entropy is negative. B. Enthalpy is negative and entropy is negative. C. Enthalpy is negative and entropy is positive. D.

Give two sources of energy that can cause ocean waves

A. describe where to look on the periodic table to find Elements which have similar reactivity and other properties. B. explain why they have similar properties C. name three elements that have those similarities.

Of element x has 22 protons, how many electrons does it have

Given a solution with a hydroxide ion concentration oh = 2.73 * 10-5 what is the ph

What is the mass in grams of 390 mL

Around 1910, Rutherford bombarded gold foil with alpha particles. Most of the alpha particles passed straight through. To his surprise, a smaller number were deflected by 180°. This summary recounts the scientific discovery of A.

What is the density? Mass = 120 g Volume = 96 mL

A spoonful of salt is stirred into a pot of water. The salt is a

What are some catchy projects titles for the question, "What liquids cause the most tooth decay?"