What is the pHpH of a solution obtained by dissolving two extra-strength aspirin tablets, containing 590 mgmg of acetylsalicylic acid each, in 340 mLmL of water?

The answer to your question is pH = 2.02

Explanation:

Data

pH = ?

mass of acetylsalicylic acid = 590 mg

volume of water = 340 ml

Process

1.- Calculate the molecular mass of acetylsalicylic acid

Molecular mass = 180.2 g

2.- Convert the mass to moles

                 180.2 g 1 mol

                 0.59 g x

                 x = (0.59 x 1)/180.2

                 x = 0.00327 moles of acid

3.- Calculate molarity

Molarity = moles/volume (L)

Molarity = 0.00327/0.34

Molarity = 0.0096

4.- Calculate the pH of the solution

pH = -log[0.0096]

pH = 2.02

the answer is true.

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.