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Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o
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Drive down any three characteristic of modern periodic table
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Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.
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Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products
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What do you have to do to change an atom labeled + ion or - ion into a neutral atom?...
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