What is the hydroxide ion concentration in an aqueous solution with a hydrogen ion concentration of concentration
2.70 x 10-2 M?

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Compare and contrast physical changes with chemical changes.

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?