At 25 °c, what is the hydroxide ion concentration, [oh-], in an aqueous solution with a hydrogen ion concentration of [h ] = 3.0 * 10-5 m?

What is the term given to the penetrating rays and particles given off by radioactive materials called

Which of the following best explains why anodization is a useful process in many industries? Anodization can improve the appearance of dull metals by adding layers of gold or silver to them.

If you have 100.0ml of a 30.0% aqueous solution of ethanol, what volume of ethanol is in the solution?

A weather front occurs when two air masses of differing temperatures meet. When a cold air mass meets a warm air mass, for example, what will happen to the warm air? A. It will reverse directions. B. It will sink. C. It will rise. D.

Which group of the priodic Table contains calcuim amd magnesium? Give reason for your answer.

Which of the following will most likely happen if you apply unbalanced forces to an object? It will change position. It will become charged. It will change mass. It will change size.

Magnetism easily separates what mixture? A). Sand and glass B). Sand and iron C). Sand and clay D). Sand and aluminum

Match the science with the best description?

Can magnetism be used to identify a substance

Nitrogen dioxide dimerizes to give dinitrogen tetroxide: 2NO2 (g) → N2O4 (g). At 298 K, 12.55 g of an NO2/N2O4 mixture exerts a pressure of 0.963 atm in a volume of 6.92 L. What are the mole fractions of the two gases in the mixture?