DIRECTIONS: FILL THE BLANKS WITH THE CORRECT ANSWER.  The critical age under which sunscreens should not be used on babies is: ___ The critical wavelength used in the broad-spectrum test of sunscreens is: ___ Sunscreens that are broad-spectrum and have an SPF value of at least ___ can claim that they can prevent aging and skin cancer. A sunscreen claimed to be “very water resistant” still provides protection after____ minutes of water immersion.  A particle is usually called nanoparticle if its size is smaller than ___ nm.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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DIRECTIONS: FILL THE BLANKS WITH THE CORRECT ANSWER. 

  1. The critical age under which sunscreens should not be used on babies is: ___
  2. The critical wavelength used in the broad-spectrum test of sunscreens is: ___
  3. Sunscreens that are broad-spectrum and have an SPF value of at least ___ can claim that they can prevent aging and skin cancer.
  4. A sunscreen claimed to be “very water resistant” still provides protection after____ minutes of water immersion.
  5.  A particle is usually called nanoparticle if its size is smaller than ___ nm.
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