The pH of water is about 7. The pH of lemon juice is about 2. Which liquid is an acid?

Given the energy levels of electrons in a hydrogen atom (table), rank the photons emitted by the following electron transitions from longest to shortest wavelength. n=4 to n=3 n=4 to n=2 n=2 to n=1 n=3 to n=1

Has anyone taken Adderal for a test or homework? does it really work?

11 The greatest amount of energy released per gram of reactants occurs during a (1) redox reaction (2) fission reaction (3) substitution reaction (4) neutralization reaction

A decrease in the magnitude of velocity is called

What effect does electronegativity have on the type of bonds formed when two atoms react to form a compound?

How are percent mass calculations used? a. They are used for determining concentrations in solutions and water of hydration c. They are used for determining water of hydration and the combustion analysis of hydrocarbons b.

The following mechanism has been proposed for the gas-phase reaction of chloroform (CHCl3) and chlorine.

Catherine has some seawater. She wants to separate pure water from the seawater. She sets up the apparatus shown in the diagram below. Name the change of state that occurs at the surface of the seawater. It is a distillation diagram

Elements in the noble gas family are considered stable because

A house cat with a mass of 3.0 kg runs at a constant rate of 4.0 m/s in a straight line. What is the momentum of the cat?