A sample of tofu has a hydrogen ion concentration of [H+]=6.3*10-8. What is the approximate pH of the tofu?

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explanation:

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120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

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.