A shopping mall wanted to determine whether the more expensive “Tough Stuff" floor wax was better than the cheaper “Steel Seal” floor wax at protecting its floor tiles against
scratches. One liter of each grade of floor wax was applied to each of the 5 ¢st sections of the
main hall of the mall. The test sections were all the same size and were covered with the
same kind of tiles. Five other test sections received no wax. After 3 weeks, the number of
scratches in each of the test sections was counted. what is the experimental variable?
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Janel’s class studied properties of matter and how matter can change. janel decided she would do an experiment mixing baking soda and vinegar.question: describe the properties of baking soda and vinegar, and explain the changes that janel should see when she mixes the two types of matter. •first, identify the physical state of matter of baking soda. describe another property of baking soda. •next, identify the physical state of matter of vinegar. describe another property of vinegar. •then, explain what janel should see when she mixes the baking soda and vinegar. •describe the states of matter of the new materials that are formed. •explain how janel can be certain a change has occurred. me

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

|using the periodic tablewarm-upuse the periodic table in the tools bar to answer the following questions.what elemental classification does oxygen belongto? done