When oh- and h+ ions are brought together, they quickly combine to form water molecules.
a. true
b. false

The correct answer is true.

Explanation:

When the ions OH- and H+ come into contact with each other, they briskly combine to produce the molecules of water. In this combination, a cation and an anion combine to exhibit a neutral state of their charges and produce molecules of water.  

Neutralization refers to a reaction in which a base like NaOH and an acid like HCl react quantitatively with each other, and in this kind of reaction salt and water are the products of the reaction.  

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

i need mutiple choices