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The difference between the atomic number of an element and the element’s atomic mass is the number of ions.
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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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Chemistry, 22.06.2019 14:00, rosetoheart2
What mass of natural gas (ch4) must you burn to emit 276 kj of heat?
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calculate the number of grams of each dissolve compound in the solution:500 mL of a 0.990 MNa2SO4 so...
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