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A fire extinguisher contains 95g of of carbon dioxide gas. How many molecules of the gas are present
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Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.
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An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.
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Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?
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Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
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A fire extinguisher contains 95g of of carbon dioxide gas. How many molecules of the gas are present...
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