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What is the atomic number of an atom that has five neutrons and four electrons
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The pressure inside a hydrogen-filled container was 2.10 atm at 21 ? c. what would the pressure be if the container was heated to 92 ? c ?
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Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
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Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation
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What is the atomic number of an atom that has five neutrons and four electrons...
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