What type of reaction is the following:
Na2S + 2HCI-> H2S + 2NaCl...
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How is the atomic number of a nucleus changed by alpha decay
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How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process
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Condensation happens when water vapor cools. true or false? ?
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Which of the following is the molecular formula for a simple sugar? a. cooh b. h2o c. oh d. c6h12o6
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