Which ion is responsible for basic properties?

hydronium

hydroxide

hydrogen

a and c

What is the exact location of an earthquake on earths surface, A. Core B. pole C. Focus and D. Epicenter?

Raphaela wants to enter the school science fair and has a list of ideas for a project. Which questions could she answer through scientific investigation? Check all that apply.

What is the difference between a phase and a phase transition? a. a phase is a region with homogeneous (uniform) properties and a conversion between states is called a "phase transition" c.

13. which of the following states of matter has no definite shape but does have a fixed volume? a. liquid b. solid c. gas d. element

What is the symbol for deciliter?

Which part of Dalton's atomic theory was disproved by Thomson's experiment? O Atoms cannot be created, destroyed, or divided into smaller particles. O Chemical reactions occur when atoms combine, separate, or rearrange.

Of the following, which is most likely to result after a farmer sprays his crops with pesticides? A. The crops die. B. The insect population increases. C. The soil dries up and blows away. D. A neighbor's well tests positive for pesticides.

How many liters does the following number of atoms of helium take up? 9.42x10^22 atoms He

Why isn't biuret reagent required for determining the absorption spectrum of hemoglobin?

During which phase change does the arrangement of water molecules become more orderly A.) melting B.) subliming C.) boiling D.) condensing