What gives the gem amethyst its purplish color?

When 4.31 g of a nonelectrolyte solute is dissolved in water to make 345 mL of solution at 25 °C, the solution exerts an osmotic pressure of 851 torr. a. What is the molar concentration of the solution? b.

When hydrogen is burned in oxygen to form water, the composition of water formed does not depend on the amount of oxygen reacted. interpret this in terms of the law of definite proportion?

In testing the effectiveness of an antacid compound, 20.0g of Hydrochloric Acid is mixed with 28.0g of Magnesium Hydroxide. will the base neutralize all of the acid? How much of which substance is in excess? 2HCL + Mg (OH) 2 - -> MgCl2 + 2H2O

What could be done to change this carbide ion to a neutral carbon atom?

What is atomicity of a molecule

How do you make liquid nitrogen icecream

When mixtures of gaseous h2 and gaseous cl2 react, a product forms that has the same properties regardless of the relative amounts of h2 and cl2 used.

An atom of potassium-37 and an atom of potassium-42 differ in their total number of (1) electrons (3) protons (2) neutrons (4) positrons

Does a physical change occur more often than a chemical change?

List two solutions you can drink